LLMAPI only
Claude Sonnet 4
Anthropic
Updated May 22, 2026 · Benchmarks via Artificial Analysis, specs & pricing via OpenRouter · Methodology · Report an error
Superseded by Claude Sonnet 4.5
Specifications
- Type
- LLM
- Access
- API only
- Released
- May 22, 2025
- License
- proprietary
- Context window
- 1,000,000 tokens
- Knowledge cutoff
- January 31, 2025
- Output speed
- 101 tok/s
- Latency (TTFT)
- 0.4s
- Input
- Text, Image
- Output
- Text
- API pricing
- $3.00 in · $15.00 out / 1M tokens
Capabilities
Function callingWeb search
Benchmarks
Reasoning
| GPQA Diamond | 75.4 |
Coding
| SWE-bench Verified | 72.7 |
| Terminal-Bench | 35.5 |
| LiveCodeBench | 65.5 |
Agents
Multimodal
| MMMU | 74.4 |
General
| MMLU | 88 |
| MMLU-Pro | 84.2 |
| Humanity’s Last Exam | 9.6 |
Our take
The balanced Claude 4 model, pairing strong coding and reasoning with the price and speed that made it the developer default.