Claude Opus 3
Release (see availability)First Opus in the multimodal Claude 3 family.
Claude API and Claude Pro; partner clouds forthcoming.
Anthropic · Claude Opus version history
Documented releases by product. Dates refer to official events; coverage is curated and may not include the latest version.
Named Opus releases and distinct announcements checked against official launch and API release notes through October 1, 2026. Numerical gaps are not filled. Availability describes launch-day access, not current support; older models may be retired.
Sources checked through
Direction: oldest → newest · Earliest documented event · Most recent documented event
Claude Opus 4
Release (see availability)Extended thinking and sustained coding and agent workflows.
Paid Claude plans, API, Bedrock and Vertex AI.
Official sources
Link to this eventClaude Opus 4.1
Release (see availability)Improved coding, reasoning and agentic tasks.
Paid Claude, Claude Code, API and partner clouds.
Official sources
Link to this eventClaude Opus 4.5
Release (see availability)Improved coding, agents and computer use at lower token prices.
Claude apps, API and three major clouds.
Official sources
Link to this eventClaude Opus 4.6
Release (see availability)Improved sustained agent coding; 1M-token context initially in beta.
Model publicly released; beta applied to context capability.
Official sources
Link to this eventClaude Opus 4.7
Release (see availability)Improved difficult coding and high-resolution image understanding.
Generally available in Claude, API, Bedrock, Vertex AI and Microsoft Foundry.
Official sources
Link to this eventClaude Opus 4.8
Release (see availability)More reliable agentic work and collaboration.
Available across platforms; fast mode remained a research preview.
Official sources
Link to this eventClaude Opus 5
Release (see availability)Improved coding and knowledge work for long-running agents.
All platforms including API; default on Claude Max at launch.
Official sources
Link to this eventClaude Opus 5.5
Release (see availability)Improved complex coding and knowledge work with faster, more efficient output.
All platforms including API, AWS, Google Cloud and Azure.
Official sources
Link to this event