Claude Sonnet 4
Anthropic
The balanced workhorse of Anthropic's first Claude 4 generation (May 2025), pairing strong intelligence with fast, cost-effective inference. Deprecated and scheduled for retirement on June 15, 2026 in favor of Claude Sonnet 4.6.
Strengths
- Strong intelligence-to-cost ratio for production workloads
- Extended thinking support with 64K max output
- 200K context window with vision and tool use
Caveats
- Deprecated - retiring June 15, 2026; migrate to Sonnet 4.6
- 200K context trails the 1M offered by Sonnet 4.6
- Vendor
- Anthropic
- Context Window
- 200,000 tokens
- Max Output
- 64,000 tokens
- License
- Proprietary
- Release Date
- 2025-05-22
- Training Cutoff
- 2025-03-31
- Modalities
- textimage
Capabilities
Vision
Audio
Video
Tool Use
Resources
Pricing
$3 per 1M input tokens, $15 per 1M output tokens. Prompt caching and Batch API (50% off) available.