Claude Sonnet 4.5 API Pricing
Claude Sonnet 4.5 is Anthropic's state-of-the-art model offering high intelligence, speed, and efficiency for code generation, writing, and logical analysis. Supports text and image inputs. Token-based pricing: $1.80/M input tokens, $9.00/M output tokens. Two endpoints: standard async (/claude-sonnet-4-5) and live streaming (/claude-sonnet-4-5/stream) via SSE.
About Claude Sonnet 4.5
Claude Sonnet 4.5 is Anthropic's state-of-the-art model offering high intelligence, speed, and efficiency for code generation, writing, and logical analysis. It strikes the perfect balance between reasoning depth and execution speed. Pricing: $1.80 per million input tokens and $9.00 per million output tokens.
Interactive Savings Calculator
Estimate monthly API spend and compare absolute developer savings.
$18000.00
$1.80/M input tokens, $9.00/M output tokens$30000.00
~$3.00/M input tokens, ~$15.00/M output tokensDetailed Pricing Breakdown
| Provider | Estimated Rate | Notes |
|---|---|---|
| muapiapp | $1.80/M input tokens, $9.00/M output tokens | Token-based billing. Minimum $0.00035 per call. ~60% of official Anthropic pricing. |
| Anthropic (official) | ~$3.00/M input tokens, ~$15.00/M output tokens | Official pricing via api.anthropic.com. |
| Fal.ai | Not available | Claude Sonnet 4.5 is not available on Fal.ai. |
Developer Integration Snippets
Model FAQ
Compare similar models
Ready to scale your production?
Get instant access to developer keys. Integrate high-speed dynamic models in minutes with our robust SDKs.