AClaude Sonnet 5.5
claude-sonnet family · launched 2026-09-28
MultimodalReasoningToolsStructuredClaude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fixing bugs, and producing...
What this model supports
Strengths by domain
Every result has a source
Raw results and standardized readings are shown together. Missing tests add neither points nor penalties.
Coding2 results
LiveBench 2.0 · CodingLiveBench94.70 scoreReading 94.7
Imported from LiveBench 2.0. The published 0–100 score is used directly; it is not z-score normalized.
Configuration: LiveBench 2.0, AIHOT aggregateOpen evidenceAIHOT · CodingAIHOT73.30 scoreReading 73.3
Imported from AIHOT aggregate leaderboard. The published 0–100 score is used directly; it is not z-score normalized.
Configuration: LiveBench 2.0, AIHOT aggregateOpen evidenceResearch & reasoning2 results
LiveBench 2.0 · ResearchLiveBench91.60 scoreReading 91.6
Imported from LiveBench 2.0. The published 0–100 score is used directly; it is not z-score normalized.
Configuration: LiveBench 2.0, AIHOT aggregateOpen evidenceAIHOT · ResearchAIHOT72.90 scoreReading 72.9
Imported from AIHOT aggregate leaderboard. The published 0–100 score is used directly; it is not z-score normalized.
Configuration: LiveBench 2.0, AIHOT aggregateOpen evidenceProfessional work2 results
LiveBench 2.0 · ProfessionalLiveBench74.30 scoreReading 74.3
Imported from LiveBench 2.0. The published 0–100 score is used directly; it is not z-score normalized. Professional = long-agentic, browser, data-analysis and design average.
Configuration: LiveBench 2.0, AIHOT aggregateOpen evidenceAIHOT · ProfessionalAIHOT71.90 scoreReading 71.9
Imported from AIHOT aggregate leaderboard. The published 0–100 score is used directly; it is not z-score normalized.
Configuration: LiveBench 2.0, AIHOT aggregateOpen evidenceKnowledge & instruction2 results
LiveBench 2.0 · KnowledgeLiveBench83.60 scoreReading 83.6
Imported from LiveBench 2.0. The published 0–100 score is used directly; it is not z-score normalized. Knowledge uses the published LiveBench research suite.
Configuration: LiveBench 2.0, AIHOT aggregateOpen evidenceAIHOT · KnowledgeAIHOT64.50 scoreReading 64.5
Imported from AIHOT aggregate leaderboard. The published 0–100 score is used directly; it is not z-score normalized.
Configuration: LiveBench 2.0, AIHOT aggregateOpen evidenceHuman preference & indices4 results
LiveBenchLiveBench81.01 scoreReading 81.0
Imported from LiveBench 2.0. The published 0–100 score is used directly; it is not z-score normalized.
Configuration: LiveBench 2.0, AIHOT aggregateOpen evidenceArena TextLMArena1,472.9 EloReading 79.4
Direct LMArena text leaderboard result.
Open evidenceAIHOT aggregate leaderboardAIHOT71.40 scoreReading 71.4
Imported from AIHOT aggregate leaderboard. The published 0–100 score is used directly; it is not z-score normalized.
Configuration: LiveBench 2.0, AIHOT aggregateOpen evidenceAA IndexArtificial Analysis67.00 indexReading 64.4
Imported from Artificial Analysis. The published 0–100 score is used directly; it is not z-score normalized.
Configuration: LiveBench 2.0, AIHOT aggregateOpen evidence