Claude Sonnet 4.6 Launches with Major Computer Use and Coding Upgrades

Feb 17, 2026 · Updated Apr 25, 2026

Claude Sonnet 4.6, Anthropic's new mid-tier model, upgrades coding, computer use, long-context reasoning, and agent planning at the same price as Sonnet 4.5 ($3/$15 per million tokens). In Claude Code testing, users preferred it over Sonnet 4.5 70% of the time - reporting fewer hallucinations, better instruction following, and less code duplication. Users even preferred it to Opus 4.5, November's frontier model, 59% of the time.

Computer use sees the biggest jump: OSWorld benchmarks show steady improvement across sixteen months, with users reporting human-level performance on multi-step web forms and complex spreadsheets. Prompt injection resistance now matches Opus 4.6.

Available via claude-sonnet-4-6 on the API. The free tier now runs Sonnet 4.6 by default and includes file creation, connectors, skills, and compaction.

View the full update on anthropic.com

Claude

@claudeaiFeb 17

This is Claude Sonnet 4.6: our most capable Sonnet model yet. It’s a full upgrade across coding, computer use, long-context reasoning, agent planning, knowledge work, and design. It also features a 1M token context window in beta. https://t.co/TDId3XUSRs

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