Claude 4Released 2025-05-14
Claude Sonnet 4
Proven all-rounder with 64K max output
Family
Claude 4
Release Date
2025-05-14
Best For
Legacy applications, proven stability, established integrations
Overview
Claude Sonnet 4 was the first Sonnet model of the Claude 4 generation. It provides an exceptional balance of intelligence and cost with 64K max output at $3/$15 per MTok. It remains a strong and reliable choice for existing integrations and production systems.
Pricing
Input / 1M tokens
$3.00
Output / 1M tokens
$15.00
Context Window
200K
Max Output
64K
API model ID:
claude-sonnet-4Key Features
✓64K token max output
✓200K token context window
✓Near-Opus intelligence at 5x lower cost
✓Proven stability in production environments
✓Fast response times for interactive applications
Use Cases
Existing integrations requiring stability
Production systems with established prompts
General-purpose coding and debugging
Content creation and copywriting
Benchmarks
| Benchmark | Score |
|---|---|
| Graduate-Level Reasoning (GPQA) | 72.0% |
| Coding (SWE-bench Verified) | 41.0% |
| MMLU (5-shot) | 87.9% |
| HumanEval (Python) | 88.5% |