Claude 4 Opus
Anthropic · Released May 2026
The deepest reasoning model available, ideal for complex analysis and agentic coding, but premium pricing limits it to high-value tasks.
Is it right for you?
Good for
- Complex multi-step reasoning
- Agentic coding with deep codebase understanding
- Research analysis and synthesis
- Difficult mathematical proofs
Not good for
- Simple classification or extraction tasks
- High-volume production where Sonnet suffices
- Budget-constrained projects
How it performs by task
Complex reasoning
Unmatched depth of reasoning for multi-step problems, mathematical proofs, and edge case handling.
Agentic coding
Best model for autonomous coding agents that need to understand large codebases and make architectural decisions.
Research synthesis
Exceptional at synthesizing information from multiple sources into coherent, nuanced analysis.
Code generation
Top-tier code generation with the deepest understanding of complex patterns and trade-offs.
Creative writing
Produces the most nuanced and stylistically sophisticated prose, though slower than Sonnet.
Pricing
Input
$15 / 1M tokens
Output
$75 / 1M tokens
Context
1M tokens
Benchmarks
Verdict history
Long-document analysis: single-pass Claude now beats RAG below 50 docs
Full reasoningSources
- Anthropic Claude ModelsMay 2026
- Anthropic PricingMay 2026