Anthropic · Claude
Claude Opus 4
RetiredClaude 4 flagship, 'world's best coding model' at launch (72.5% SWE-bench Verified). Guide flagged it retiring June 15, 2026 — treated as retired as of the catalog date. $15/$75 at launch.
About this version
Claude Opus 4 is a legacy version of Anthropic’s Claude family that launched on 22 May 2025 as the flagship model, featuring an expanded context window of roughly 200 000 tokens and being promoted as the leading coding assistant at launch, achieving a high verification rate on the SWE‑bench benchmark. The model was priced at $15 for short prompts and $75 for longer usage when introduced, and it was officially retired on 15 June 2026.
- API string
- claude-opus-4-20250514
- Context window
- 200K ctx
- Tier
- Legacy
- Released
- May 22, 2025
Release & change timeline
2 events- Retirement
Claude Opus 4 retired
Guide announced claude-opus-4-20250514 retiring June 15, 2026; model string returns errors after retirement.
- Release
Claude Opus 4 released
Claude 4 flagship; called the world's best coding model at launch.
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