Introducing Claude Sonnet 4.6

Sonnet 4.6 is Anthropic’s new default on Free and Pro plans.
- Pricing flat at $3/$15 per million tokens (input/output).
- 1M token context window now in beta.
Developers preferred 4.6 over 4.5 ~70% of the time.
- Also beats Opus 4.5 in user preference ~59% of the time.
Computer use benchmark (OSWorld) shows steady 16-month improvement curve.
- Pace insurance benchmark: 94% accuracy on real-world computer use tasks.
Broad enterprise adoption: Cursor, GitHub, Replit, Databricks, Cognition, Harvey, Box.
- Windsurf, Bolt, Zapier, Hebbia, Rakuten among named design partners.
Safety eval: no signs of high-stakes misalignment; strong safety behaviors confirmed.