Claude 3 Opus
Closed
Claude 3 Opus launched on March 4, 2024, with access through Anthropic’s generally available API and the paid Claude Pro chat service. It accepted text and images and had a stated 200K-token context window; larger windows were offered only for selected use cases.
Benchmark scores
Access
Anthropic API and Claude Pro access began March 4, 2024. Bedrock and Vertex availability for Opus was still forthcoming in that announcement. This historical named release is separate from later snapshots; current service availability and retirement were not audited.