GPT 5.2 (Fast) API
About
Build advanced reasoning agents with GPT 5.2 (Fast), a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $3.50/1M input and $28.00/1M output tokens, native tool calling support. Access GPT 5.2 (Fast) via the Vercel AI Gateway API with up to 128K output tokens.
Capabilities
Input Modalities
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Output Modalities
text
Limits
Context Window
400K
Tokens
Input Limit
272K
Tokens
Max Output
128K
Tokens
Pricing
Standard (per 1M tokens)
Input
$3.50
Output
$28.00
Caching (per 1M tokens)
Read
$0.35
Frequently Asked Questions
GPT 5.2 (Fast) by Vercel AI Gateway costs $3.50 per 1M input tokens and $28.00 per 1M output tokens. Cached reads cost $0.35 per 1M tokens.
Model Details
ID
openai/gpt-5.2-fast
Provider
Vercel AI GatewayFamily
gpt
Release Date
Dec 11, 2025
Knowledge Cutoff
Aug 31, 2025
API Integration