News · Claude
Claude Developers: A calculator helps estimate task costs when moving to Opus 5.5
Posted on X by Claude Developers (@ClaudeDevs) on 25 September 2026. The headline is our summary; the post itself is quoted below.
Claude Developers@ClaudeDevs ·
Opus 5.5 is 20% cheaper per input and output token than Opus 5, and 60% cheaper on cache reads. So what does that actually do…
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Context
- Claude Code 2.1.283Released the same day (UTC). Added x-claude-code-prompt-id to the gateway hint headers so LLM gateways can group the requests that serve one user prompt; opt in with CLAUDE_CODE_GATEWAY_HINT_HEADERS=1 ·…
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