Claude Sonnet 4.5 API
About
Build advanced reasoning agents with Claude Sonnet 4.5, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $3.75/1M input and $18.75/1M output tokens, native tool calling support. Access Claude Sonnet 4.5 via the Venice AI API with up to 50K output tokens.
Capabilities
Input Modalities
textimage
Output Modalities
text
Reasoning
Yes
Structured Output
Yes
Tool Use
Yes
WeightsClosed
Temperature
Adjustable
Attachment
Supported
Limits
Context Window
198K
Tokens
Input Limit
198K
Tokens
Max Output
50K
Tokens
Pricing
Standard (per 1M tokens)
Input
$3.75
Output
$18.75
Caching (per 1M tokens)
Read
$0.38
Write
$4.69
Frequently Asked Questions
Claude Sonnet 4.5 by Venice AI costs $3.75 per 1M input tokens and $18.75 per 1M output tokens. Cached reads cost $0.38 per 1M tokens. Cache writes cost $4.69 per 1M tokens.
Model Details
ID
claude-sonnet-45
Provider
Venice AIFamily
claude-sonnet
Release Date
Jan 15, 2025
Knowledge Cutoff
Sep 1, 2025
API Integration