Claude Opus 5

Published

Jul 24, 2026

Claude Opus 5 is an AI model developed by Anthropic (United States), first published in July 2026. It works in the language, vision and multimodal domain, on tasks such as language modeling/generation and chat.

Epoch AI has no training-compute estimate for this model.

Access: API access. Its weights are not openly released. Epoch AI rates the confidence of this record as confident.

Full record

Organization: Anthropic
Country of organization: United States
Domain: Language, Vision, Multimodal
Task: Language modeling/generation, Chat
Model accessibility: API access
Open weights: No
Epoch confidence: Confident

Benchmark results

01

Epoch Capabilities Index

ECI Score

159.4