anthropic/claude-sonnet-4.5Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows.
Scores on standardized evaluations. Higher is better — and rank shows where Claude Sonnet 4.5 lands among all models tracked on Model Beat.
Abstract visual reasoning
Harder abstract reasoning
Graduate-level scientific reasoning
Frontier of human expert knowledge
Common-sense trick questions
Factual accuracy & hallucination
Novel ML problem-solving
Code performance optimization
Real GitHub issue resolution
Human-rated web development
Olympiad-qualifier math
Research-level math problems
Hardest research math
Hardest competition math
Economically valuable work
Autonomous task length
Command-line agentic tasks
Model & benchmark data from Epoch AI (CC BY); pricing, specs & descriptions from OpenRouter.