Claude Opus 5.5 Fast API
About
Build advanced reasoning agents with Claude Opus 5.5 Fast, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $8.00/1M input and $40.00/1M output tokens, native tool calling support. Access Claude Opus 5.5 Fast via the Venice AI API with up to 128K output tokens.
Capabilities
Input Modalities
textimage
Output Modalities
text
Reasoning
Yes
Structured Output
Limits
Context Window
1.0M
Tokens
Input Limit
1.0M
Tokens
Max Output
128K
Tokens
Pricing
Standard (per 1M tokens)
Input
$8.00
Output
$40.00
Caching (per 1M tokens)
Read
$0.40
Write
$10.00
Frequently Asked Questions
Claude Opus 5.5 Fast by Venice AI costs $8.00 per 1M input tokens and $40.00 per 1M output tokens. Cached reads cost $0.40 per 1M tokens. Cache writes cost $10.00 per 1M tokens.
Model Details
ID
claude-opus-5-5-fast
Provider
Venice AIFamily
claude-opus
Release Date
Sep 26, 2026
Knowledge Cutoff
Jun 1, 2026
API Integration