Claude Sonnet 4.6 was released February 17, 2026. Scored 79.6% on SWE-bench Verified and ranked No. 1 on GDPval-AA leaderboard. Matches Opus-class performance on many benchmarks at one-fifth the cost. Default model for free and Pro Claude users. Priced at \$3/\$15 per million tokens with 200K context (1M beta).
Modality
text, image
Capabilities3
tool-useextended-thinkingagentic-coding