Anthropic: Claude Sonnet 4
Analysis Summary
Anthropic: Claude Sonnet 4 sits in the Professional tier on our leaderboard, ranked #53 of 544 published models on overall intelligence. At $3.00 input and $15.00 output per 1M tokens, it is among the most expensive on the market. It offers an exceptionally large context window suited to long-document workflows and supports tool use, function calling, vision, and reasoning.
Editorial notes
Claude Sonnet 4 from Anthropic delivers strong instruction following, vision, tool use, and a 1M token context with reliable agentic performance, making it a capable choice for client-facing content and workflow automation.
Assessed May 5, 2026
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
Performance Profile
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%),..
Capabilities
Performance Indices
Source: Artificial Analysis
Benchmark Scores
Intelligence
Technical
Content
Benchmark data from Artificial Analysis and Hugging Face
How does Anthropic: Claude Sonnet 4 stack up?
Compare side-by-side with other professional models.
Model Information
| OpenRouter ID |
anthropic/claude-sonnet-4
|
| Provider | anthropic |
| Release Date | May 22, 2025 |
| Context Length | 1,000,000 tokens |
| Max Completion | 64,000 tokens |
| Status | Active |
Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $3.00 | $0.003000 |
| Output | $15.00 | $0.015000 |
Live Performance
Live endpoint metrics ā refreshed every 30 minutes.
