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claude-opus-5-5ChatExamples verified 2026-09-25

Claude Opus 5.5

The latest Opus at $4 / $20, 20% cheaper than Opus 5. Built for deep reasoning and multi-step agents.

Official price
$4 / $20/ 1M tokensInput / output
Context window
1M tokens1,000,000
Notes
  • Anthropic protocol only: the Base URL has no /v1, and /v1/chat/completions returns 404.
  • Thinking can't be turned off: thinking.disabled and budget_tokens both return 400; control it with output_config.effort (default medium).
  • tool_choice must be auto; assistant prefill isn't supported.
Read the integration guideJSON Schema

Pricing

Official price in USD. Actual charge = official price × group multiplier.

Input
$4 / 1M tokens
Cached input
$0.20 / 1M tokens
Output
$20 / 1M tokens

Endpoints

Same family

claude-sonnet-5claude-sonnet-4-6claude-opus-5claude-opus-4-8claude-opus-4-7claude-opus-4-6claude-haiku-4-5-20251001claude-fable-5-1claude-fable-5

Prices come from the public catalog; limits come from specs exported from the gateway’s validation code. Actual charge = official price × group multiplier.