Claude Sonnet 4.5 (latest) API
About
Build advanced reasoning agents with Claude Sonnet 4.5 (latest), a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers available completely free of charge, native tool calling support. Access Claude Sonnet 4.5 (latest) via the Snowflake Cortex API with up to 16K output tokens.
Capabilities
Input Modalities
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Output Modalities
text
Limits
Context Window
200K
Tokens
Input Limit
200K
Tokens
Max Output
16K
Tokens
Pricing
Standard (per 1M tokens)
Input
Free
Output
Free
Frequently Asked Questions
Claude Sonnet 4.5 (latest) by Snowflake Cortex costs Free per 1M input tokens and Free per 1M output tokens.
Model Details
ID
claude-sonnet-4-5
Provider
Snowflake CortexFamily
claude-sonnet
Release Date
Sep 29, 2025
Knowledge Cutoff
Jul 31, 2025
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
SNOWFLAKE_ACCOUNT
SNOWFLAKE_CORTEX_PAT
API Base URL
https://${SNOWFLAKE_ACCOUNT}.snowflakecomputing.com/api/v2/cortex/v1