Claude Opus 5
Claude Opus 5 is an Anthropic model released on July 24, 2026, with the API ID claude-opus-5.
- Lab
- Anthropic
- Release date
- Status
- Generally available
- API model ID
- claude-opus-5
- Context window
- 1,000,000 tokens
- Max output
- 128,000 tokens
Anthropic released Claude Opus 5 on July 24, 2026, as claude-opus-5. The Claude Platform release notes give a 1M-token context window (default and maximum) and 128K max output tokens, with thinking on by default. Anthropic made it available in Claude.ai, Claude Code and Claude Cowork, and on the Claude API, Amazon Bedrock, Claude Platform on AWS, Google Cloud and Microsoft Foundry.
Claude Opus 5.5 followed on September 22, 2026.
- Availability
- Claude.ai, Claude Code, Claude Cowork; Claude API, Amazon Bedrock, Claude Platform on AWS, Google Cloud, Microsoft Foundry.
- Official source
- anthropic.com
- Last checked
Questions
When was Claude Opus 5 released?
claude-opus-5.What is the context window of Claude Opus 5?
Where can I use Claude Opus 5?
What came after Claude Opus 5?
Source
Release dates, model IDs and limits come from each lab’s own announcement, changelog, documentation or deprecations page, linked on every model with the date it was last checked. How we pick and check sources: editorial standards.