FrontierAnthropic
Claude Sonnet 4
Context
200K tokens
Pricing
$3/M input, $15/M output
Modalities
text, image, code
Released
May 2025
- Overview
- Anthropic's best model for coding and balanced high-capability tasks. Claude Sonnet 4 offers near-Opus intelligence at significantly lower cost and latency, making it the default choice for most production workloads.
- Why it matters
- Sonnet 4 is the workhorse model that most engineering teams will actually deploy. It leads benchmarks on code generation, refactoring, and debugging while maintaining strong reasoning across all domains. The price-performance sweet spot makes it viable for always-on coding assistants, CI/CD review bots, and production-grade RAG systems. For CTOs evaluating build-vs-buy, Sonnet 4's coding capability often tips the decision toward building custom AI tooling in-house rather than buying packaged solutions.
Key strengths
- Top-tier coding performance across languages
- Excellent price-to-performance ratio for frontier capability
- Strong vision and document understanding
- Fast enough for interactive use, smart enough for complex tasks
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