Anthropic
30 releases · Mar 2023 – Oct 2026
AI safety company building the Claude family of models. Founded in 2021 by former OpenAI researchers. AI Release Tracker has logged 30 Anthropic models, from Claude 1 (Mar 14 2023) through Claude Haiku 5.5 (Oct 7 2026). Every release below links to a dedicated page with benchmarks, parameters, and context window.
A new Anthropic model typically arrives about every 21 days, with the next projected around Wednesday, Oct 28, 2026. Its strongest benchmark results to date include BullshitBench v2 (95%, on Claude Opus 4.8), SWE-Bench Verified (96%, on Claude Opus 5), and Next.js Evals (97%, on Claude Fable 5.1). These models are closed, available through Anthropic's API and products.
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Release cadence
Releases by year
Year-over-year totals for Anthropic. The current year is partial.
Releases by day of week
Which days of the week Anthropic ships on.
Best benchmark scores
All releases
30 releases · Mar 14 2023 – Oct 7 20262026
13 releases2025
7 releases2024
6 releasesFrequently asked questions
The most recent Anthropic model tracked on AI Release Tracker is Claude Haiku 5.5, released on Oct 7 2026.