anthropic/claude-sonnet-5Claude Sonnet 5 is Anthropic’s proprietary AI model, released Jun 30, 2026. It costs $2/M input and $10/M output tokens, and handles a 1M-token context window. Its strongest use case is coding, where it ranks in the 79th percentile of the models Model Beat tracks.
Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work.
Scores on standardized evaluations. Higher is better — and rank shows where Claude Sonnet 5 lands among all models tracked on Model Beat.
Graduate-level scientific reasoning
Frontier of human expert knowledge
Common-sense trick questions
Factual accuracy & hallucination
Novel ML problem-solving
Code performance optimization
Scientific research coding
Human-rated web development
Olympiad-qualifier math
Multi-step agentic tasks
Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work.
Claude Sonnet 5 is an AI model developed by Anthropic, part of the Claude family, released Jun 30, 2026.
Claude Sonnet 5's list price from Anthropic is $2 per million input tokens and $10 per million output tokens.
Claude Sonnet 5 supports a context window of up to 1M tokens.
On standardized evaluations tracked by Epoch AI, Claude Sonnet 5 scores 53.6% on SciCode, 41.3% on Humanity's Last Exam, 1544 on WebDev Arena.
Claude Sonnet 5 is a proprietary model (API access), available through its provider's API rather than as a downloadable open-weight model.
Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Aug 20, 2026.