anthropic/claude-sonnet-4.6Claude Sonnet 4.6 is Anthropic’s proprietary AI model, released Feb 17, 2026. It costs $3/M input and $15/M output tokens, and handles a 1M-token context window.
Sonnet 4.6 is Anthropic's most capable Sonnet-class model yet, with frontier performance across coding, agents, and professional work.
Scores on standardized evaluations. Higher is better — and rank shows where Claude Sonnet 4.6 lands among all models tracked on Model Beat.
Abstract visual reasoning
Harder abstract reasoning
Graduate-level scientific reasoning
Frontier of human expert knowledge
Factual accuracy & hallucination
Novel ML problem-solving
Scientific research coding
Real GitHub issue resolution
Human-rated web development
Olympiad-qualifier math
Research-level math problems
Hardest research math
Multi-step agentic tasks
Command-line agentic tasks
Tool-agent-user reliability
Sonnet 4.6 is Anthropic's most capable Sonnet-class model yet, with frontier performance across coding, agents, and professional work.
Claude Sonnet 4.6 is an AI model developed by Anthropic, part of the Claude family, released Feb 17, 2026.
Claude Sonnet 4.6's list price from Anthropic is $3 per million input tokens and $15 per million output tokens.
Claude Sonnet 4.6 supports a context window of up to 1M tokens.
On standardized evaluations tracked by Epoch AI, Claude Sonnet 4.6 scores 1521 on WebDev Arena, 66.1% on WeirdML, 50.1% on SciCode.
Claude Sonnet 4.6 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 Sep 22, 2026.