Anthropic Ships Opus 5.5 at $4/$20 per Million Tokens, Cache Reads Down 60%
ClaudeDevs · x · 2026-09-23
Anthropic's official ClaudeDevs account announced Opus 5.5 pricing on the Claude Platform: $4 input / $20 output per million tokens, down from Opus 5's $5/$25. Cache reads drop 60%, from $0.50 to $0.20.
Run /claude-api migrate in Claude Code to switch to claude-opus-5-5. Anthropic also linked a guide to lowering costs on the Claude Platform. A follow-up reply notes Opus 5.5 is much better at writing — clearer, less jargon, and more compliant with user-specified writing rules, making long Claude Code sessions easier to follow.
Related event: Anthropic Launches Claude Opus 5.5: Stronger, 40% Cheaper, Tops AA Index(259 posts)→
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