Models

Every model with a recorded change, from releases to retirements. 164 models from 10 companies.

All companies Anthropic DeepSeek Google Meta Microsoft Mistral AI Moonshot AI OpenAI SpaceXSI Z.ai

All families Claude Fable Claude Haiku Claude Mythos Claude Opus Claude Sonnet

Available Retired (4)All

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Showing 18 models. Most popular is estimated US search interest over recent months, as of Oct 24, 2026. Searches for a family name count toward its current versions, and an older version ranks below the one that replaced it.

Claude Opus 5.5
Model at Anthropic · Claude Opus family
Limits change: Perplexity Agent API xhigh effort raises max steps from 100 to 300 · 3d
Claude Fable 5.1
Model at Anthropic · Claude Fable family
Now available: Full Claude Platform available on Google Cloud (Anthropic managed) · 1w
Claude Mythos 5.1
Model at Anthropic · Claude Mythos family
Successor: Claude Fable 5.1 released as the successor to Fable 5 · Sep 1, 2026
Claude Sonnet 5.5
Model at Anthropic · Claude Sonnet family
Now available: Full Claude Platform available on Google Cloud (Anthropic managed) · 1w
Claude Fable 5
Model at Anthropic · Claude Fable family
Successor: Claude Fable 5.1 released as the successor to Fable 5 · Sep 1, 2026
Claude Opus 5
Model at Anthropic · Claude Opus family
Benchmark: Arena text leaderboard: Gemini 4 Argon first, Opus 5.5 second, GPT-6 Astra 73rd · 1w
Claude Haiku 5.5
Model at Anthropic · Claude Haiku family
Now available: Full Claude Platform available on Google Cloud (Anthropic managed) · 1w
Claude Sonnet 5
Model at Anthropic · Claude Sonnet family
Price change: Claude Sonnet 5 keeps its $2 / $10 price permanently · Aug 10, 2026
Claude Opus 4.8
Model at Anthropic · Claude Opus family
Retiring: Claude Opus 4.8 fast mode is deprecated and ends November 30, 2026 · 2d
Claude Haiku 4.5
Model at Anthropic · Claude Haiku family
Now available: Claude in Amazon Bedrock opens to all Bedrock customers · Apr 16, 2026
Claude Sonnet 4.6
Model at Anthropic · Claude Sonnet family
Quality report: Anthropic confirms three changes degraded Claude Code quality · Apr 23, 2026
Claude Mythos 5
Model at Anthropic · Claude Mythos family
Now available: Access to Claude Fable 5 restored after export controls lifted · Jul 1, 2026
Claude Opus 4.7
Model at Anthropic · Claude Opus family
GitHub: Copilot removes Claude Opus 4.7, Kimi K2.7 Code, Gemini 3.5 Flash and 3.6 Flash · Oct 2, 2026
Claude Opus 4.6
Model at Anthropic · Claude Opus family
Breaking change: Fast mode removed for Claude Opus 4.6 · Jun 29, 2026
Claude Opus 4.5
Model at Anthropic · Claude Opus family
Claude Sonnet 4.5Retiring Nov 30, 2026
Model at Anthropic · Claude Sonnet family
Retiring: Claude Sonnet 4.5 deprecated, retiring November 30, 2026 · Sep 30, 2026
Claude Mythos Preview
Model at Anthropic · Claude Mythos family
Retiring: Claude Mythos Preview deprecated, retirement date to be announced · Jun 9, 2026
Claude Haiku 3.5
Model at Anthropic · Claude Haiku family
Quality report: Anthropic confirms three infrastructure bugs degraded Claude responses in August and September 2025 · Sep 17, 2025