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Claude Opus 5
Anthropic · Opus
Anthropic released Claude Opus 5 on July 24, 2026.
Claude Opus 5 is the Anthropic model launched on July 24, 2026, described as a step-change improvement over Claude Opus 4.8. It supports a 1M token context window (both the default and the maximum), 128k max output tokens and thinking on by default, at $5 / $25 per million input / output tokens, the same as Opus 4.8. It is available on the Claude API, Amazon Bedrock, Claude Platform on AWS, Google Cloud and Microsoft Foundry. Effort is the main control, with the full ladder from low to max. Mid-conversation tool changes launched in beta with it, and Dreams and the computer use and browser use toolsets followed in August. Its successor is Claude Opus 5.5.
Claude Opus 5 at a glance
- Released
- API model id
claude-opus-5- Available on
- Claude APIAmazon BedrockClaude Platform on AWSGoogle CloudMicrosoft Foundry
- Previous model
- Claude Opus 4.8 (May 28, 2026)
- Announcement
- platform.claude.com
What changed from Claude Opus 4.8
The breaking change from Claude Opus 4.8 is thinking: disabling it is allowed only at effort high or below, so thinking disabled with effort xhigh or max returns an error.
Anthropic recommends steering the model with effort, using max for capability-critical work.
New to model names and version numbers? Read how AI labs version their models.
Claude Opus 5 release timeline
The launch and every later Anthropic release that mentions Claude Opus 5, oldest first.
- Claude Opus 5 launch
Launched Claude Opus 5, a cost-effective model matching Claude Fable 5 capabilities at half the price.
Source: Claude Help Center Release Notes - Claude Opus 5.5 Launch
Launch of Claude Opus 5.5 (claude-opus-5-5) for long-running agentic coding and knowledge work. Features 1M token context window, 128k max output tokens, and adaptive thinking. Available on multiple platforms.
Source: Claude Platform Release Notes
Claude Opus 5 FAQ
When was Claude Opus 5 released?
Anthropic released Claude Opus 5 on July 24, 2026. The launch entry below links to the official announcement.
Where is Claude Opus 5 available?
Claude Opus 5 is available on Claude API, Amazon Bedrock, Claude Platform on AWS, Google Cloud and Microsoft Foundry. Later availability changes are listed under follow-up releases on this page.
What is the Claude Opus 5 API model id?
Use claude-opus-5 in Anthropic's API.
What came before Claude Opus 5?
Claude Opus 5 follows Claude Opus 4.8, released on May 28, 2026.
Other Anthropic models
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