Anthropic

Model timelines and latest releases from Anthropic.

Compare latest 3 releasesCalculate the cost for your team

Model timelines

Release history per model from this vendor. Click any marker for the version page.

Claude Haiku
Claude Sonnet
Claude Opus
Claude Fable
Claude Mythos
Claude
3 - Mar 1333.5 - Nov 43.54.5 - Oct 154.55.5 - Oct 75.53 - Mar 433.5 - Jun 203.53.7 - Feb 243.74 - May 2244.5 - Sep 294.54.6 - Feb 174.65 - Jun 3055.5 - Sep 285.53 - Mar 434 - May 2244.1 - Aug 54.14.6 - Feb 54.644.7 - Apr 16 4.8 - May 28 5 - Jul 24 5.5 - Sep 22 Zoom in to separate4 releases5 - Jun 955.1 - Sep 15.12Preview - Apr 7 5 - Jun 9 Zoom in to separate2 releases5.1 - Sep 15.12 - Jul 1122.1 - Nov 212.12023 Q32023 Q42024 Q12024 Q22024 Q32024 Q42025 Q12025 Q22025 Q32025 Q42026 Q12026 Q22026 Q32026 Q4

Models

Claude Opus

Released

Latest: 5.5

Anthropic's most capable model for complex reasoning, coding, and agentic tasks.

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Claude Sonnet

Released

Latest: 5.5

Anthropic's balanced model offering strong performance at a lower cost than Opus.

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Claude

Released

Latest: 2.1

Anthropic's original general-purpose Claude model line before the tiered Claude 3 family.

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Claude Fable

Released

Latest: 5.1

Anthropic's Mythos-class Claude model with safeguards tuned for general availability, sitting above Opus in capability.

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Claude Mythos

Released

Latest: 5.1

Anthropic's Mythos-class frontier Claude models with reduced safeguards for trusted partners in cybersecurity and life sciences research.

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Claude Haiku

Released

Latest: 5.5

Anthropic's fastest Claude model line, tuned for low latency and high throughput on everyday tasks.

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