Claude Sonnet 4
by Anthropic
Claude Sonnet 4 significantly enhances the capabilities of its predecessor, Sonnet 3.7, excelling in both coding and reasoning tasks with improved precision and controllability. Ac
Models
Claude Sonnet 4
Added 10 July 2026
Overview
Claude Sonnet 4 significantly enhances the capabilities of its predecessor, Sonnet 3.7, excelling in both coding and reasoning tasks with improved precision and controllability. Achieving state-of-the-art performance on SWE-bench (72.7%),...
Best for
Best for
Production coding agents and long-context document work that need vision
Use cases
- repo agents
- code review
- document Q&A
- multimodal support bots
How to use / API access
Call via OpenRouter with model id `anthropic/claude-sonnet-4`.
- openrouter ·
anthropic/claude-sonnet-4Docs
OpenRouter id: anthropic/claude-sonnet-4
Benchmarks
- Intelligence Index (artificial-analysis): 18.9 index
- Coding Index (artificial-analysis): 37.6 index
- Design Arena 3d (other): 1138 elo · #71
- Design Arena codecategories (other): 1143 elo · #88
- Design Arena dataviz (other): 1159 elo · #77
- Design Arena gamedev (other): 1142 elo · #75
Enterprise DNA angle
Enterprise DNA runs Sonnet-class models inside Omni with secrets, jobs, and eval harnesses so coding agents ship without babysitting providers.
Notes
Claude Sonnet 4 is listed in the EDNA Models directory from the OpenRouter catalogue.
Pros
- Strong coding and agent loops with controllable outputs
- 1M context for large repos and long documents
- Vision + text in one model for multimodal workflows
Cons
- Output tokens cost more than open-weight alternatives
- Closed weights — no self-host option
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