Claude’s most advanced models for coding and knowledge work. Their research capabilities also offer an early glimpse of how AI models will contribute to scientific progress.
Claude Fable 5.1
Launch date
Claude Opus 5.5Anthropic's first model in their new Claude 5.5 family
Launched on September 23rd, 2026
Claude Fable 5.1Claude’s most advanced models for coding and knowledge work
Launched on September 2nd, 2026