Anthropic: Claude Sonnet 4, Anthropic — route, pricing & source

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%),...

OpenRoutermediumLast checked: May 14, 2026
Input
$3.00 / 1M
/ 1M tokens
Output
$15.00 / 1M
/ 1M tokens
Cached input
Not available
Not available
Cache write
Not available
Not available

Context and limits

Context window
1M
Max output
64,000
Input modalities
image, text, file
Output modalities
text
Weight access
Closed
Availability
Unknown
Capability flags
VisionToolsReasoningLong context

From source metadata + verification fields — confirm provider docs before production.

Access and license

Official API
No
Open weights
No
Self-hostable
No
License
Closed · API onlyNo public weights: use through a vendor’s cloud API or product. “Proprietary” means the creator does not distribute the trained model weights for self-hosting.

Source

Source
OpenRouter Models API
Confidence
medium
Route
OpenRouter
Last checked
May 14, 2026
Source notes
  • Includes Hugging Face benchmark data only when the dataset is public, ungated, allowlisted, and matched by reviewed aliases.
Open source
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