Anthropic · Claude
Claude Sonnet 4
RetiredClaude 4 balanced tier; launched top of SWE-bench Verified at 72.7%. Guide flagged it retiring June 15, 2026 — treated as retired as of the catalog date. $3/$15.
About this version
Claude Sonnet 4 is a legacy, balanced‑tier version of Anthropic’s Claude family that was released on 22 May 2025 and retired in June 2026. It features an expanded context window of roughly 200 000 tokens and achieved top performance on the SWE‑bench verification metric at the time of its launch.
- API string
- claude-sonnet-4-20250514
- Context window
- 200K ctx
- Tier
- Legacy
- Released
- May 22, 2025
Release & change timeline
2 events- Retirement
Claude Sonnet 4 retired
Guide announced claude-sonnet-4-20250514 retiring June 15, 2026; model string returns errors after retirement.
- Release
Claude Sonnet 4 released
Claude 4 generation launch; top of SWE-bench Verified at 72.7%.
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