Models & pricingLifecycle and reference

Model cards

Model cards with detailed documentation for Claude models.

Detailed documentation of Claude Fable 5.2 and Claude Mythos 5.2.

Detailed documentation of Claude Haiku 5.5.

Detailed documentation of Claude Sonnet 5.5.

Detailed documentation of Claude Opus 5.5.

Detailed documentation of Claude Fable 5.1 and Claude Mythos 5.1.

Detailed documentation of Claude Opus 5.

Detailed documentation of Claude Sonnet 5.

Detailed documentation of Claude Fable 5 and Claude Mythos 5.

Detailed documentation of Claude Opus 4.8.

Detailed documentation of Claude Opus 4.7.

Detailed documentation of Claude Mythos Preview.

Detailed documentation of Claude Sonnet 4.6.

Detailed documentation of Claude Opus 4.6.

Detailed documentation of Claude Opus 4.5.

Detailed documentation of Claude Haiku 4.5.

Detailed documentation of Claude Sonnet 4.5.

Detailed documentation of Claude Opus 4.1.

Detailed documentation of Claude 4 models.

System card for Claude Sonnet 3.7 with performance and safety details.

Detailed documentation of Claude Haiku 3.5 and Claude Sonnet 3.5.

Detailed documentation of Claude 3 models including the latest 3.5 addendum.

Detailed documentation of Claude 2 models.