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@simonw

Simon Willison

@simonw

Claude Sonnet 4.6 really likes drawing top hats on its pelicans https://simonwillison.net/2026/Feb/17/claude-sonnet-46/

simonwillison.net

Introducing Claude Sonnet 4.6

Sonnet 4.6 is out today, and Anthropic claim it offers similar performance to November's Opus 4.5 while maintaining the Sonnet pricing of $3/million input and $15/million output tokens (the Opus …

simonwillison.net
12:09 AM · Feb 18, 2026