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Sonnet 5

Anthropic · 2026-06-30

Claude Sonnet 5 is Anthropic's June 2026 Sonnet-class Claude model, an upgrade to Sonnet 4.6 with stronger broad capability, improved prompt-injection robustness, and adaptive thinking support for agentic and professional-work tasks.

Benchmark scores

BenchmarkScore
AA-AnalystAgent (pass@1)61.5
AA-AnalystAgent (pass@5)77.5
AA-AnalystAgent (pass^5)46.3
AA-Briefcase Elo1355
AA-Briefcase v1.1 Elo1356
AA-LCR70.7
AA-LCR v1.176.7
AA-Omniscience Index16.4
AdvancedIF73.3
AdvancedIF (rubric mean score)92.9
AgentVQA43.4
AgentVQA Egocentric Videos47.0
AgentVQA Games53.0
AgentVQA Robotics36.5
AgentVQA Spatial Planning42.5
AgentVQA Web Agents38.0
AIME 202588.3
ALE-Bench1783
Android Bench 2.06.7
Android Bench 2.0 Completion59.8
APEX (Mercor)11.5
APEX-Agents32.5
APEX-Agents 1.167.4
APEX-Agents 1.1 Pass@154.5
APEX-SWE46.4
APEX-v1-extended49.6
Arena Alignment — Deceptive Completion15.8
Arena Alignment — False Attribution9.8
Arena Alignment — Unauthorized Action1.7
Arena Alignment Index75.7
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