claude-opus-5

• We've launched Claude Opus 5 (claude-opus-5), a step-change improvement over Claude Opus 4.8. Claude Opus 5 supports a 1M token context window (both the default and the maximum), 128k max output tokens, and thinking on by default, at $5 / $25 USD per MTok, the same pricing as Claude Opus 4.8. It's available on the Claude API, Claude in Amazon Bedrock , Claude Platform on AWS , Claude on Google Cloud , and Claude in Microsoft Foundry . See What's new in Claude Opus 5 for new features, behavior changes, and migration guidance, and the models overview for complete specs.

• On Claude Opus 5, disabling thinking is allowed only at effort high or below: thinking: {"type": "disabled"} with effort xhigh or max returns a 400 error, a breaking change from Claude Opus 4.8. See What's new in Claude Opus 5 .

Read from the provider's text; the quote is the provider's exact lines.

• We've launched Claude Opus 5 (claude-opus-5), a step-change improvement over Claude Opus 4.8.

Read from the provider's text; the quote is the provider's exact lines.