Claude Opus 5
Language modelPrevious generationCard summarizedA thoughtful and proactive model that comes close to the frontier intelligence of Claude Fable 5 at half the price
Overview
Opus 5
A thoughtful and proactive model that comes close to the frontier intelligence of Claude Fable 5 at half the price
- Cost
- $5.00 in
- Context
- 1M
- Input / output
- $5.00 / $25.00
- Max output
- 128K
- Knows up to
- May 2026
- Released
- 24 Jul 2026
Anthropic's Opus-class large language model and an upgrade to Claude Opus 4.8, with gains in agentic coding, computer use and long-horizon knowledge work, plus better mathematical and scientific reasoning. On many evaluations it is comparable to, and sometimes ahead of, Claude Fable 5 and Claude Mythos 5. p.2, p.4
claude-opus-5- Input / output per 1M
- $5.00 / $25.00
- Context window
- 1M
- Max output
- 128K
- Knows up to
- May 2026
- Reasoning
- Adaptive
- Weights
- Closed
About this card. A model card is the maker's own account of a model: what it's for, how it was trained and tested, and where it falls short. This page condenses Anthropic's System Card: Claude Opus 5. Every claim carries its source page.