AI Model
Claude Sonnet 4.6
byAnthropic
Released on February 17, 2026
Release Summary
Full upgrade across coding, computer use, long-context reasoning, agent planning, and knowledge work. Features 1M token context window (beta) and significant improvements in consistency and instruction following. Users prefer it to Sonnet 4.5 roughly 70% of the time, and over Opus 4.5 59% of the time — approaching Opus-level intelligence at $3/$15 per million tokens.
Timeline
February 17, 2026
Claude Sonnet 4.6 released
Anthropic releases Sonnet 4.6 with 1M context window support, major advances in computer use (OSWorld benchmarks), and Opus-level intelligence at Sonnet pricing. Available on all Claude plans, Claude Code, the API, and major cloud platforms.