Claude Opus 4.8
By Anthropic
Released: 2026-05-28
Claude Opus 4.8 is Anthropic's June 2026 flagship model, succeeding Opus 4.7. It posts a headline score of 81 on the hardest agentic coding and reasoning suites, holds long-horizon tool-use plans together across far more steps, and is notably more candid about its own uncertainty - refusing to fabricate rather than confidently pressing on. It is the default choice for serious agentic and software-engineering workloads.
Visit Claude Opus 4.8AI-Powered
Leverages advanced AI technology to deliver cutting-edge capabilities and results.
Fast & Efficient
Optimized performance ensures quick results without compromising on quality.
Purpose-Built
Specifically designed for llms tasks and workflows.
Anthropic Model Timeline
Long-context context
200k tokens context
200k tokens context
1,000k tokens context
200k tokens context
200k tokens context
1,000k tokens context
200k tokens context
200k tokens context
200k tokens context
200k tokens context
200k tokens context
Specifications
AI Evaluation
The strongest model Anthropic has shipped. The longer reliable horizon and improved self-assessment matter more in production than the benchmark - though you only feel the gain if your workflow is built to exploit it.
Pros
- Best-in-class agentic reliability
- More honest about uncertainty
- Surgical code edits
Cons
- Premium pricing
- 'Too honest' for users who want an answer no matter what
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