Anthropic
Claude release dates and model history
Latest Claude model: Claude Haiku 5.5, released October 7, 2026. Next: Claude Fable 5.5, rumored. Every Claude release date with sources, checked every 5 minutes.
Looking for the next model?
A browser notification for each confirmed release in this family. No account or email.
The live tracker separates released models, announcements and unconfirmed rumors. An expected date is not a confirmed release.
Follow upcoming models →About this model family
Anthropic launched Claude in March 2023, first for a small circle, then for everyone that summer. In 2024, Claude 3 invented the three sizes still used today: Haiku (fast), Sonnet (everyday), Opus (the heavy one). The versions kept coming, up to Claude 5 in 2026: Fable and Mythos. The most capable, Fable 5.1 and Mythos 5.1, arrived on 1 September 2026, Mythos for vetted partners only. The Claude 5.5 family followed: Opus 5.5 on 22 September, Sonnet 5.5 on 28 September and Haiku 5.5 on 7 October.
Release history
Dates come from the cited sources. A catalog listing date can differ from the first public release. Dates below use UTC.
Claude Haiku 5.5
Claude Haiku 5.5 is Anthropic's small, fast model for high-volume, cost-sensitive work such as summarization, subagents, and browser use. It succeeds Claude Haiku 4.5 with stronger coding, computer use, and...
Anthropic · Claude Haiku 5.5Claude Sonnet 5.5
Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fixing bugs, and producing...
Anthropic · Claude Sonnet 5.5Claude Opus 5.5
Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...
Anthropic · Claude Opus 5.5Claude Fable 5.1
Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual...
Anthropic · Claude Fable 5.1 and Mythos 5.1Claude Opus 5
Claude Opus 5 is Anthropic’s flagship model for demanding reasoning, coding, and long-horizon agentic work. It is particularly strong at end-to-end software tasks, code review and bug finding, visual analysis...
Anthropic · Claude Opus 5Claude Sonnet 5
Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work. It supports adaptive thinking with selectable reasoning effort levels (low, medium, high, max,...
Anthropic · Claude Sonnet 5Claude Fable 5
Claude Fable 5 is a Mythos-class model from Anthropic, built for autonomous knowledge work and coding. It supports text, image, and file inputs with text output, with reasoning support and...
Anthropic · Claude Fable 5 and Mythos 5Claude Opus 4.8
Claude Opus 4.8 is Anthropic's most capable generally available model in the Opus family. It supports text, image, and file inputs with text output, with reasoning support and a 1M-token...
Anthropic · Claude Opus 4.8Claude Opus 4.7
Opus 4.7 is the next generation of Anthropic's Opus family, built for long-running, asynchronous agents. Building on the coding and agentic strengths of Opus 4.6, it delivers stronger performance on...
Anthropic · Claude Opus 4.7Claude Sonnet 4.6
Sonnet 4.6 is Anthropic's most capable Sonnet-class model yet, with frontier performance across coding, agents, and professional work. It excels at iterative development, complex codebase navigation, end-to-end project management with...
Anthropic · Claude Sonnet 4.6Claude Opus 4.6
Opus 4.6 is Anthropic’s strongest model for coding and long-running professional tasks. It is built for agents that operate across entire workflows rather than single prompts, making it especially effective...
Anthropic · Claude Opus 4.6Claude Opus 4.5
Claude Opus 4.5 is Anthropic’s frontier reasoning model optimized for complex software engineering, agentic workflows, and long-horizon computer use. It offers strong multimodal capabilities, competitive performance across real-world coding and...
Anthropic · Claude Opus 4.5Claude Haiku 4.5
Claude Haiku 4.5 is Anthropic’s fastest and most efficient model, delivering near-frontier intelligence at a fraction of the cost and latency of larger Claude models. Matching Claude Sonnet 4’s performance...
Anthropic · Claude Haiku 4.5Claude Sonnet 4.5
Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows. It delivers state-of-the-art performance on coding benchmarks such as SWE-bench Verified, with...
Anthropic · Claude Sonnet 4.5Claude Opus 4.1
Claude Opus 4.1 is an updated version of Anthropic’s flagship model, offering improved performance in coding, reasoning, and agentic tasks. It achieves 74.5% on SWE-bench Verified and shows notable gains...
Anthropic · Claude Opus 4.1Claude Opus 4
Claude Opus 4 is benchmarked as the world’s best coding model, at time of release, bringing sustained performance on complex, long-running tasks and agent workflows. It sets new benchmarks in...
Anthropic · Introducing Claude 4Claude Sonnet 4
Claude Sonnet 4 significantly enhances the capabilities of its predecessor, Sonnet 3.7, excelling in both coding and reasoning tasks with improved precision and controllability. Achieving state-of-the-art performance on SWE-bench (72.7%),...
Anthropic · Introducing Claude 4Claude 3.7 Sonnet
Claude 3.7 Sonnet, in February 2025, refined the line with hybrid reasoning. Public date from the family biography or the public catalogue; a listing date is not always the release day.
Wikipedia · Claude (model release history)Claude 3.5 Sonnet
Claude 3.5 Sonnet arrived in June 2024 and was revised in October 2024. Public date from the family biography or the public catalogue; a listing date is not always the release day.
Wikipedia · Claude (model release history)Claude 3 Haiku
Claude 3 Haiku is Anthropic's fastest and most compact model for near-instant responsiveness. Quick and accurate targeted performance.
Anthropic · Claude 3 HaikuClaude 2
Claude 2 made the model public in July 2023. Claude 2.1 followed that November and doubled down on context. Public date from the family biography or the public catalogue; a listing date is not always the release day.
Anthropic · Claude 2Claude 1
Anthropic shipped Claude 1 in March 2023, the first public model of the line. Public date from the family biography or the public catalogue; a listing date is not always the release day.
Anthropic · Introducing Claude
Questions about Claude
- What is the latest Claude model?
- Claude Haiku 5.5, released on October 7, 2026.
- What is the next Claude model?
- Claude Fable 5.5, a rumor for now.
- How often does Anthropic release a new Claude model?
- About every 23 days over the last 12 months (median gap between releases).
Sources and references
Add this badge to your site
It shows live whether the next Claude model is out, and links back here.
<a href="https://no-no-update.com/en/models/claude"><img src="https://no-no-update.com/badge/claude.svg" alt="Claude release dates and model history" height="20"></a>