Claude Opus 4.8 posts 78.2 on SWE-bench Verified

Anthropic published a 78.2% SWE-bench Verified score for Opus 4.8 with a minimal scaffold, a 1.4-point jump over the previous top entry. Lab-reported; the leaderboard maintainers have queued an independent run.

Significance 4: New top score on the primary coding axis source; lab-reported cap applies.

Sources

• primary SWE-bench Verified leaderboard retrieved 2026-08-20

Models

• Claude Opus 4.8

Affected axes

Coding

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