Anthropic Claude Model Release Timeline - Model Family Tree, Capability Evolution, and Platform Availability
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I summarize the model family tree of Claude Opus, Claude Sonnet, and Claude Haiku, the full chronology of major releases with links to the official
anthropic.com/news/ announcements, the evolution of capabilities (context window, vision, tool use, computer use, prompt caching, extended thinking, memory tool, 1M context, effort parameter), the differences in availability across the Anthropic API, Amazon Bedrock, Google Cloud Vertex AI, and Microsoft Foundry, and the lifecycle of deprecated and retired Claude models as listed on Anthropic's official model deprecation page.Companion articles on hidekazu-konishi.com:
- AWS History and Timeline regarding Amazon Bedrock - Overview, Functions, Features, Summary of Updates, and Introduction
- Amazon Bedrock Model Catalog 2026
- Claude Code Features and Settings Reference 2026
Overview - From Anthropic's Founding to Claude Opus 4.7
Anthropic was founded in 2021 as an AI safety company by former OpenAI researchers, and published the paper "Constitutional AI: Harmlessness from AI Feedback" in December 2022 introducing the training method that has since shaped every Claude model.The first publicly available Claude model arrived on March 14, 2023, when Anthropic launched the Anthropic API with Claude and Claude Instant.
Three years later, as of the time of writing, the Claude family covers three named size tiers - Opus, Sonnet, and Haiku - introduced together with Claude 3 in March 2024, with the current frontier being Claude Opus 4.7 announced on April 16, 2026.
Across these three years, Claude has been the first foundation model from a frontier lab to reach a 100K-token context window (May 2023), an early adopter of vision input across all model tiers (Claude 3, March 2024), the launch model for Computer Use as a public beta capability (Claude 3.5 Sonnet new, October 2024), and the introduction point for the extended-thinking and hybrid-reasoning paradigm in a production model (Claude 3.7 Sonnet, February 2025).
The 4.x generation that started in May 2025 brought a 1-million-token beta context window, the
effort parameter that lets developers trade off speed against capability, an explicit memory tool, and incremental coding gains that have made Claude Opus 4.x the default model for several AI-coding agent products.The scope of this article is limited to publicly announced models and capabilities documented at
anthropic.com/news/ and the official Claude API documentation. I do not include speculative future models. Pricing details change frequently and are deliberately omitted in favor of links to Anthropic's official pricing page.This timeline primarily references the following sources.
- Anthropic News
- Claude API Documentation
- Model deprecations - Claude API
- What's New with AWS - Amazon Bedrock
Claude Model Family Tree (Opus / Sonnet / Haiku)
Since the Claude 3 generation introduced in March 2024, the family has been organized into three named size tiers: Opus (maximum capability), Sonnet (balanced), and Haiku (low latency, low cost).The pre-3 generation (Claude 1, Claude Instant, Claude 2, Claude 2.1) predates this naming scheme; in retrospect, Claude 1 and Claude 2 sit on the Opus lineage and Claude Instant sits on the Haiku lineage.
The diagram below shows the full family tree from Claude 1 in 2023 through the 4.6/4.7 generation in early 2026.
The Sonnet lane covers the balanced tier introduced with Claude 3: Claude 3 Sonnet (March 2024), Claude 3.5 Sonnet (June 2024), Claude 3.5 Sonnet new / v2 (October 2024), Claude 3.7 Sonnet (February 2025), Claude Sonnet 4 (May 2025), Claude Sonnet 4.5 (September 2025), and Claude Sonnet 4.6 (February 2026).
The Haiku lane is the fastest and lowest-cost tier: Claude Instant (March 2023, retrospectively on the Haiku lineage), Claude 3 Haiku (March 2024), Claude 3.5 Haiku (October 2024 announce, November 2024 availability), and Claude Haiku 4.5 (October 2025). Note that Anthropic has not released Haiku versions corresponding to every Sonnet/Opus minor revision - Haiku 4.0 and Haiku 4.6 do not exist as of April 2026.
Timeline of Major Releases
Here is the full chronological timeline of Anthropic Claude model releases and major capability announcements. Each row links to the officialanthropic.com/news/ post or the equivalent official source.* The table can be sorted by clicking on the column names.
| Date | Event |
|---|---|
| 2021-01 | Anthropic is founded as an AI safety company by Dario Amodei, Daniela Amodei, and other former OpenAI researchers. |
| 2022-12-15 | Anthropic publishes the Constitutional AI paper introducing the alignment method that underpins every later Claude model. Source: Constitutional AI: Harmlessness from AI Feedback. |
| 2023-03-14 | Claude 1 and Claude Instant are announced and the Anthropic API opens for early access. Source: Introducing Claude. |
| 2023-05-11 | The context window is expanded from 9K to 100K tokens on Claude. This was the first 100K-token context window from a frontier AI lab. Source: Introducing 100K Context Windows. |
| 2023-07-11 | Claude 2 is announced with improved coding, math, and reasoning, the public claude.ai chat interface, and a 100K context window. Source: Claude 2. |
| 2023-08-01 | Claude 2 becomes available on Amazon Bedrock (in preview) with up to 100,000-token context windows, joining Anthropic Claude as a Bedrock preview model ahead of Bedrock's GA. Source: Anthropic's Claude 2 foundation model is now available in Amazon Bedrock. |
| 2023-09-25 | Anthropic and Amazon announce a strategic collaboration under which Anthropic will make future Claude models available on Amazon Bedrock and use AWS Trainium and Inferentia for training. Source: Anthropic + Amazon. |
| 2023-09-28 | Amazon Bedrock reaches general availability in US East (N. Virginia) and US West (Oregon) with Anthropic Claude 2 as one of the launch foundation models, alongside models from AI21 Labs, Cohere, Meta, Stability AI, and Amazon Titan. Source: Amazon Bedrock is now generally available. |
| 2023-11-21 | Claude 2.1 is announced with a 200K-token context window, system prompts, and tool use as a beta. Source: Claude 2.1. |
| 2024-03-04 | The Claude 3 family is announced (Opus, Sonnet, Haiku), introducing the three-tier naming scheme that all later Claude models follow. Claude 3 is the first Claude family with multimodal (vision) input across every model tier. Claude 3 Opus and Claude 3 Sonnet are available the same day; Claude 3 Haiku follows shortly after. Source: Introducing the next generation of Claude. |
| 2024-03-13 | Claude 3 Haiku is generally available on the Anthropic API. Source: Claude 3 Haiku - our fastest model yet. |
| 2024-04-04 | Tool use enters public beta on the Claude API, allowing models to call developer-defined functions. |
| 2024-05-30 | Tool use becomes generally available on Claude 3 Opus, Sonnet, and Haiku. Source: Tool use is now generally available. |
| 2024-06-20 | Claude 3.5 Sonnet is announced with significant gains in coding, reasoning, and vision, and at the same price and speed as Claude 3 Sonnet. The same announcement introduces the Artifacts feature in claude.ai. Source: Claude 3.5 Sonnet. |
| 2024-08-14 | Prompt caching enters public beta on the Anthropic API, allowing developers to cache long repeated prompt prefixes for cost and latency reductions. Source: Prompt caching with Claude. |
| 2024-10-08 | The Message Batches API enters public beta, enabling asynchronous batch processing of up to 10,000 messages at 50% off standard pricing. Source: Introducing the Message Batches API. |
| 2024-10-22 | Claude 3.5 Sonnet (new) and Claude 3.5 Haiku are announced, and Computer Use is released as a public beta capability, allowing Claude to perceive and interact with computer interfaces by viewing screens, moving the cursor, clicking, and typing. Source: Introducing computer use, a new Claude 3.5 Sonnet, and Claude 3.5 Haiku. |
| 2024-11-04 | Claude 3.5 Haiku becomes available on the Anthropic API. |
| 2025-02-24 | Claude 3.7 Sonnet is announced as Anthropic's first hybrid reasoning model with both standard and extended-thinking modes that the user controls via the API, alongside a research preview of the Claude Code command-line coding agent. Source: Claude 3.7 Sonnet and Claude Code. |
| 2025-05-22 | Claude Opus 4 and Claude Sonnet 4 are announced, kicking off the Claude 4 generation. Claude Opus 4 is positioned as the world's best coding model at the time of announcement, with extended-thinking with tool use and improved memory features. Claude Code reaches general availability. Source: Introducing Claude 4. |
| 2025-08-05 | Claude Opus 4.1 is announced with improved coding (74.5% on SWE-bench Verified), research, and data-analysis performance, available on the Claude API, Amazon Bedrock, and Google Cloud Vertex AI. Model identifier claude-opus-4-1-20250805. Source: Claude Opus 4.1. |
| 2025-09-29 | Claude Sonnet 4.5 is announced with major coding, instruction-following, and agentic improvements at the same price as Sonnet 4. Model identifier claude-sonnet-4-5-20250929. Source: Claude Sonnet 4.5. |
| 2025-10-15 | Claude Haiku 4.5 is announced, the first Haiku model to support both extended thinking and Computer Use. It matches Claude Sonnet 4's coding performance at roughly one-third the cost and over twice the speed. Model identifier claude-haiku-4-5-20251001. Source: Claude Haiku 4.5. |
| 2025-11-24 | Claude Opus 4.5 is announced with the new effort parameter for balancing capability against cost, context compaction, and a deeper memory tool. Available on the Claude API, Amazon Bedrock, Google Cloud Vertex AI, and Microsoft Foundry. Model identifier claude-opus-4-5-20251101. Source: Claude Opus 4.5. |
| 2026-02-05 | Claude Opus 4.6 is announced, inheriting the 1-million-token beta context window (first introduced in Sonnet 4.5 on 2025-09-29) at the Opus tier, with 128K output tokens, adaptive thinking, and a new Claude Code "agent teams" feature for parallel autonomous work. Model identifier claude-opus-4-6 (first generation to use the dateless pinned-snapshot ID format). Source: Claude Opus 4.6. |
| 2026-02-17 | Claude Sonnet 4.6 is announced, retaining the 1-million-token beta context window introduced with Sonnet 4.5 and adding major improvements in coding and Computer Use. Early-access developers preferred Sonnet 4.6 to Opus 4.5 in 59% of evaluations. Model identifier claude-sonnet-4-6. Source: Claude Sonnet 4.6. |
| 2026-04-16 | Claude Opus 4.7 is announced as the current frontier model with substantial gains on the hardest coding tasks, higher-resolution vision input, a new xhigh effort level, file-system-based memory recall across sessions, and the Task Budgets public beta. Available on the Claude API, Amazon Bedrock, Google Cloud Vertex AI, and Microsoft Foundry. Model identifier claude-opus-4-7. Source: Claude Opus 4.7. |
There may be slight variations in the dates in this timeline due to differences between announcement, general availability on the Anthropic API, and general availability on cloud platforms. The dates above prioritize the original Anthropic announcement date when both exist.
The content posted here is limited to major releases and capabilities considered essential for understanding the Claude family.
In other words, please note that the items on this timeline are not all updates from Anthropic, but are representative releases that I have picked out.
Capability Evolution
Beyond the model release dates themselves, Anthropic has shipped a steady stream of capability upgrades that apply across multiple Claude models. The table below tracks when each major capability first became available on Claude.* The table can be sorted by clicking on the column names.
| Capability | First Introduced | First Model | Notes |
|---|---|---|---|
| Anthropic API | 2023-03-14 | Claude 1 / Claude Instant | Initial early-access launch. |
| 100K context window | 2023-05-11 | Claude 1.3 (Claude-100K) | First 100K context window from a frontier lab. |
| Public claude.ai chat interface | 2023-07-11 | Claude 2 | Public chat product. |
| 200K context window | 2023-11-21 | Claude 2.1 | Doubling of the previous 100K limit. |
| System prompts | 2023-11-21 | Claude 2.1 | Introduced alongside Claude 2.1. |
| Tool use (beta) | 2023-11-21 | Claude 2.1 | Originally launched as a developer beta. |
| Vision (multimodal input) | 2024-03-04 | Claude 3 (Opus / Sonnet / Haiku) | Native image input on every tier. |
| Tool use GA | 2024-05-30 | Claude 3 Opus / Sonnet / Haiku | Out of beta. |
| Artifacts in claude.ai | 2024-06-20 | Claude 3.5 Sonnet | Side-panel interactive output. |
| Prompt caching (beta) | 2024-08-14 | Claude 3.5 Sonnet / 3 Haiku | Cache reusable prompt prefixes. |
| Message Batches API (beta) | 2024-10-08 | Claude 3.5 Sonnet | Asynchronous batch inference at 50% off. |
| Computer Use (beta) | 2024-10-22 | Claude 3.5 Sonnet (new) | Screen perception, mouse, keyboard. |
| Extended thinking | 2025-02-24 | Claude 3.7 Sonnet | First hybrid reasoning mode controllable from the API. |
| Claude Code (research preview) | 2025-02-24 | Claude 3.7 Sonnet | Command-line agentic coding tool. |
| Claude Code GA | 2025-05-22 | Claude Opus 4 / Sonnet 4 | Coding agent leaves preview. |
| Memory tool | 2025-05-22 | Claude Opus 4 | Server-side persistent memory primitive. |
| Files API | 2025-05-22 | Claude Opus 4 / Sonnet 4 | Upload and reference files in conversations. |
| 1M context window (beta) | 2025-09-29 | Claude Sonnet 4.5 | First 1M-token context tier. |
| effort parameter | 2025-11-24 | Claude Opus 4.5 | Trade off output tokens for capability. |
| Context compaction | 2025-11-24 | Claude Opus 4.5 | Automatic summarization of long conversations. |
| Plan Mode in Claude Code | 2025-11-24 | Claude Opus 4.5 | Pre-execution planning step in Claude Code. |
| Agent teams in Claude Code | 2026-02-05 | Claude Opus 4.6 | Parallel autonomous agents inside Claude Code. |
| 128K output tokens | 2026-02-05 | Claude Opus 4.6 | Larger maximum output. |
| Adaptive thinking | 2026-02-05 | Claude Opus 4.6 | Automatic reasoning depth selection. |
| Higher-resolution vision | 2026-04-16 | Claude Opus 4.7 | Up to 2,576-pixel long edge (~3.75 megapixels). |
| xhigh effort level | 2026-04-16 | Claude Opus 4.7 | New point on the effort tradeoff curve. |
| Task Budgets (public beta) | 2026-04-16 | Claude Opus 4.7 | Per-task token spend guidance. |
| File-system memory recall | 2026-04-16 | Claude Opus 4.7 | Cross-session memory backed by file storage. |
Availability Across Platforms
Anthropic Claude models are available on four primary platforms: the Anthropic API (andclaude.ai), Amazon Bedrock, Google Cloud Vertex AI, and Microsoft Foundry (added with the 4.5 generation). The table below summarizes when major Claude generations arrived on each platform.* The table can be sorted by clicking on the column names.
| Model | Anthropic API | Amazon Bedrock | Google Vertex AI | Microsoft Foundry |
|---|---|---|---|---|
| Claude 1 / Claude Instant | 2023-03-14 | - | - | - |
| Claude 2 | 2023-07-11 | 2023-08-01 (preview), 2023-09-28 (Bedrock GA) | - | - |
| Claude 2.1 | 2023-11-21 | 2023-11 | - | - |
| Claude 3 Opus / Sonnet | 2024-03-04 | 2024-03 | 2024-03 | - |
| Claude 3 Haiku | 2024-03-13 | 2024-03 | 2024-04 | - |
| Claude 3.5 Sonnet | 2024-06-20 | 2024-06 | 2024-06 | - |
| Claude 3.5 Sonnet (new) / 3.5 Haiku | 2024-10-22 / 2024-11-04 | 2024-11 | 2024-11 | - |
| Claude 3.7 Sonnet | 2025-02-24 | 2025-02 | 2025-02 | - |
| Claude Opus 4 / Sonnet 4 | 2025-05-22 | 2025-05 | 2025-05 | - |
| Claude Opus 4.1 | 2025-08-05 | 2025-08 | 2025-08 | - |
| Claude Sonnet 4.5 | 2025-09-29 | 2025-09 | 2025-09 | - |
| Claude Haiku 4.5 | 2025-10-15 | 2025-10 | 2025-10 | - |
| Claude Opus 4.5 | 2025-11-24 | 2025-11-24 | 2025-11-24 | 2025-11-24 |
| Claude Opus 4.6 / Sonnet 4.6 | 2026-02-05 / 2026-02-17 | 2026-02 | 2026-02 | 2026-02 |
| Claude Opus 4.7 | 2026-04-16 | 2026-04-16 | 2026-04-16 | 2026-04-16 |
For the earliest Claude generations (1, 2, 2.1), Claude was only available through the Anthropic API or via early-partner programs. The first major external platform was Amazon Bedrock, which has carried Claude since the Bedrock general availability launch on 2023-09-28. Google Cloud Vertex AI began offering Claude models starting in early 2024. Microsoft Foundry is the most recent addition, first carrying Claude with the 4.5 generation in November 2025.
For the most current platform availability and exact regional rollouts, refer to Amazon Bedrock supported foundation models, Google Cloud Vertex AI Anthropic Claude models, and the Microsoft Foundry model catalog.
Deprecations and Model Lifecycle
Anthropic operates a four-stage model lifecycle: Active → Legacy → Deprecated → Retired. Once a model is marked Deprecated, Anthropic provides a recommended replacement and at least 60 days of notice before retirement. After the retirement date, API calls to that model identifier fail. The table below lists every Claude model deprecation announcement that has been published, drawn from the official Model deprecations page.The Recommended Replacement column reflects the currently recommended successor on Anthropic's deprecation page as of the time of writing. Anthropic updates this recommendation as newer models become available, so for older deprecation announcements the recommended replacement listed here is generally not the model that was suggested at the time of the original announcement.
* The table can be sorted by clicking on the column names.
| Announce Date | Deprecated Model(s) | Retirement Date | Recommended Replacement |
|---|---|---|---|
| 2024-09-04 | claude-1.0, claude-1.1, claude-1.2, claude-1.3, claude-instant-1.0, claude-instant-1.1, claude-instant-1.2 | 2024-11-06 | claude-haiku-4-5-20251001 |
| 2025-01-21 | claude-2.0, claude-2.1, claude-3-sonnet-20240229 | 2025-07-21 | claude-opus-4-7 / claude-sonnet-4-6 |
| 2025-06-30 | claude-3-opus-20240229 | 2026-01-05 | claude-opus-4-7 |
| 2025-08-13 | claude-3-5-sonnet-20240620, claude-3-5-sonnet-20241022 | 2025-10-28 | claude-sonnet-4-6 |
| 2025-10-28 | claude-3-7-sonnet-20250219 | 2026-02-19 | claude-sonnet-4-6 |
| 2025-12-19 | claude-3-5-haiku-20241022 | 2026-02-19 | claude-haiku-4-5-20251001 |
| 2026-02-19 | claude-3-haiku-20240307 | 2026-04-20 | claude-haiku-4-5-20251001 |
| 2026-04-14 | claude-sonnet-4-20250514, claude-opus-4-20250514 | 2026-06-15 | claude-sonnet-4-6 / claude-opus-4-7 |
As of the time of writing, the active models that have not been marked for deprecation are Claude Opus 4.7, Claude Opus 4.6, Claude Opus 4.5, Claude Opus 4.1, Claude Sonnet 4.6, Claude Sonnet 4.5, and Claude Haiku 4.5. Claude Sonnet 4 and Claude Opus 4 are currently in the Deprecated state with a retirement date of June 15, 2026.
The Claude 3 generation (Opus, Sonnet, Haiku) has fully retired by April 2026 - Claude 3 Opus on January 5, 2026, Claude 3 Sonnet on July 21, 2025, and Claude 3 Haiku on April 20, 2026. The Claude 3.5 generation (Sonnet original and v2, Haiku) is also fully retired as of February 19, 2026. The Claude 3.7 Sonnet model retired on the same date.
Frequently Asked Questions
When did Claude 1 launch?
Claude 1 was announced together with Claude Instant on March 14, 2023, when Anthropic opened the Anthropic API for early access. See the official Introducing Claude announcement.When did Claude 2 launch?
Claude 2 was announced on July 11, 2023, accompanied by the publicclaude.ai chat interface. See Claude 2.When did Claude 3 launch?
The Claude 3 family (Opus, Sonnet, Haiku) was announced together on March 4, 2024. Claude 3 Opus and Claude 3 Sonnet were generally available the same day, and Claude 3 Haiku became generally available on March 13, 2024. See Introducing the next generation of Claude and Claude 3 Haiku - our fastest model yet.When did Claude 3.5 Sonnet launch?
Claude 3.5 Sonnet launched on June 20, 2024. An updated revision, sometimes called Claude 3.5 Sonnet (new) or v2, was announced together with Claude 3.5 Haiku and Computer Use on October 22, 2024. See Claude 3.5 Sonnet and Introducing computer use, a new Claude 3.5 Sonnet, and Claude 3.5 Haiku.When did Claude 3.7 Sonnet launch?
Claude 3.7 Sonnet was announced on February 24, 2025, alongside the Claude Code research preview. It was Anthropic's first hybrid-reasoning model with an extended-thinking mode. See Claude 3.7 Sonnet and Claude Code.When did Claude 4 launch?
Claude Opus 4 and Claude Sonnet 4 launched on May 22, 2025, opening the Claude 4 generation. Claude Code also reached general availability that day. See Introducing Claude 4.When was Claude Opus 4.7 released?
Claude Opus 4.7 was announced on April 16, 2026 and is the current Claude frontier model as of the time of writing. See Claude Opus 4.7.When did Claude add vision support?
Vision (multimodal image input) was added to Claude on March 4, 2024 with the Claude 3 family, and was available on every tier (Opus, Sonnet, Haiku) from launch.When did Claude add tool use?
Tool use was first introduced as a beta on November 21, 2023 with Claude 2.1, and reached general availability on May 30, 2024 across Claude 3 Opus, Sonnet, and Haiku. See Tool use is now generally available.When did Claude add Computer Use?
Computer Use was released as a public beta on October 22, 2024 alongside Claude 3.5 Sonnet (new). See Introducing computer use, a new Claude 3.5 Sonnet, and Claude 3.5 Haiku. Claude Haiku 4.5 (October 15, 2025) was the first Haiku-tier model to support Computer Use.When did Claude become available on Amazon Bedrock?
Claude 2 became available on Amazon Bedrock at the Bedrock general availability launch on September 28, 2023. The strategic Anthropic + Amazon collaboration was announced three days earlier on September 25, 2023. Since then, every major Claude generation has been made available on Amazon Bedrock either on the day of its Anthropic announcement or within a few weeks.When did Claude become available on Google Cloud Vertex AI?
Google Cloud Vertex AI began carrying Claude models starting with Claude 3 in March 2024.When did Claude become available on Microsoft Foundry?
Microsoft Foundry first carried Claude with the Claude 4.5 generation on November 24, 2025, when Claude Opus 4.5 launched simultaneously on the Anthropic API, Amazon Bedrock, Google Cloud Vertex AI, and Microsoft Foundry. Every subsequent Claude release (Opus 4.6, Sonnet 4.6, Opus 4.7) has continued to ship on Microsoft Foundry on the day of the Anthropic announcement.When was each Claude model deprecated?
See the Deprecations and Model Lifecycle section above for the full deprecation table. The most recent deprecation announcement, on April 14, 2026, marks Claude Sonnet 4 and Claude Opus 4 for retirement on June 15, 2026.What is the difference between Claude Opus, Claude Sonnet, and Claude Haiku?
Since the Claude 3 generation in March 2024, Anthropic has positioned the three tiers as follows. Claude Opus is the maximum-capability tier, used for the hardest reasoning, coding, and agentic tasks. Claude Sonnet is the balanced tier, used for production workloads where cost and latency matter alongside capability. Claude Haiku is the low-latency, low-cost tier, used for high-volume, simpler tasks. Capabilities such as extended thinking and Computer Use originally launched on Sonnet or Opus and have progressively moved down to Haiku - for example, Claude Haiku 4.5 was the first Haiku model with extended thinking and Computer Use.Is there a Claude Haiku 4.6 or Claude Haiku 4.7?
No. As of April 2026, the most recent Haiku model is Claude Haiku 4.5 from October 15, 2025. Anthropic has not released Haiku versions corresponding to every Sonnet or Opus minor revision.Summary
In this article, I built a historical timeline of Anthropic Claude foundation models from Claude 1 in March 2023 through Claude Opus 4.7 in April 2026, organized by the model family tree, the major release timeline, the evolution of capabilities, availability across cloud platforms, and the deprecation lifecycle.In three years, Claude has gone from a single proprietary chat model with a 9K-token context window to a three-tier family (Opus, Sonnet, Haiku) with 1-million-token beta context windows, native vision, tool use, Computer Use, extended thinking, server-side memory, and availability across the Anthropic API, Amazon Bedrock, Google Cloud Vertex AI, and Microsoft Foundry. Each generation has consistently shipped at the same or lower price than the previous one, and capabilities that originally debuted on the Opus or Sonnet tier - such as Computer Use and extended thinking - have progressively become available on the Haiku tier as well.
I will continue to monitor how Anthropic's release cadence and capability roadmap evolve. The most reliable place to track new Claude model announcements is the official Anthropic News page, with model deprecations listed on the official Model deprecations page.
In addition, there are also related history-and-timeline articles on hidekazu-konishi.com, so please have a look if you are interested.
AWS History and Timeline regarding Amazon Bedrock - Overview, Functions, Features, Summary of Updates, and Introduction
AWS History and Timeline - Almost All AWS Services List, Announcements, General Availability(GA)
Amazon Bedrock Model Catalog 2026
Claude Code Features and Settings Reference 2026
Amazon Bedrock Glossary
References
- Anthropic News - Official announcements
- Anthropic - Introducing Claude (2023-03-14)
- Anthropic - Introducing 100K Context Windows (2023-05-11)
- Anthropic - Claude 2 (2023-07-11)
- Anthropic - Anthropic + Amazon collaboration (2023-09-25)
- Anthropic - Claude 2.1 (2023-11-21)
- Anthropic - Introducing the next generation of Claude (2024-03-04)
- Anthropic - Claude 3 Haiku (2024-03-13)
- Anthropic - Tool use is now generally available (2024-05-30)
- Anthropic - Claude 3.5 Sonnet (2024-06-20)
- Anthropic - Prompt caching with Claude (2024-08-14)
- Anthropic - Introducing the Message Batches API (2024-10-08)
- Anthropic - Introducing computer use, a new Claude 3.5 Sonnet, and Claude 3.5 Haiku (2024-10-22)
- Anthropic - Claude 3.7 Sonnet and Claude Code (2025-02-24)
- Anthropic - Introducing Claude 4 (2025-05-22)
- Anthropic - Claude Opus 4.1 (2025-08-05)
- Anthropic - Claude Sonnet 4.5 (2025-09-29)
- Anthropic - Claude Haiku 4.5 (2025-10-15)
- Anthropic - Claude Opus 4.5 (2025-11-24)
- Anthropic - Claude Opus 4.6 (2026-02-05)
- Anthropic - Claude Sonnet 4.6 (2026-02-17)
- Anthropic - Claude Opus 4.7 (2026-04-16)
- Claude API documentation
- Model deprecations - Claude API
- Amazon Bedrock supported foundation models
- Google Cloud Vertex AI - Use Claude models
- Microsoft Foundry model catalog
References:
Tech Blog with curated related content
Written by Hidekazu Konishi