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Anthropic CVP Releases 6 Rounds of Evaluations

·2026.04.29 10:59

Key point

Anthropic CVP released 6 rounds of evaluations of 4 Claude models.

Details

Sunglasses released 6 evaluation rounds over the past 10 days, repeatedly applying the same prompt set to 4 Claude models.

  • Target models: Opus 4.7, Opus 4.6, Sonnet 4.6, Haiku 4.5
  • Results: 120 transcripts were produced across 10 model-effort combinations, and all 120 were rated clean.
  • Method: 3 fixed prompts were used before execution, run in isolated Claude Code sessions, with transcripts captured, hashed, and archived, and responses graded on allowed / partial / blocked, usefulness, and safety criteria.
  • Timeline: approved on April 16, 2026, the 6th run concluded on April 26, and the family synthesis report was released on April 27
  • Next steps: an adversarial-framing appendix probe set will be used to conduct additional checks with JailbreakBench, HarmBench, AdvBench, PromptInject, Garak, PyRIT, and recent CVE PoCs.
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