Legacy (still served)
Superseded by claude-opus-5. Released 2025-11-24; ID
claude-opus-4-5-20251101; 200K context / 64K output; retirement not sooner than 2026-11-24 (no notice issued as of 2026-09-30).
Part of the Anthropic Claude 4 series
Sources
- https://platform.claude.com/docs/en/about-claude/model-deprecations (accessed 2026-09-30)
- https://platform.claude.com/docs/en/models/overview (accessed 2026-09-30)