Claude Sonnet 5.5

Every ClaudeGPT Si story about Claude Sonnet 5.5, newest first: news, analysis, reviews and guides.

1 story · Updated Oct 27, 2026

Claude Sonnet 5.5 costs $2 per million input tokens, half of Opus 5.5

API pricing, context window, plan access and the price gap with Opus 5.5, as of October 27, 2026.

ClaudeGPT Si NewsroomOct 27, 20263 min read