GPT 5.4 Mini (Fast) API
About
Build advanced reasoning agents with GPT 5.4 Mini (Fast), a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $1.50/1M input and $9.00/1M output tokens, native tool calling support. Access GPT 5.4 Mini (Fast) via the Vercel AI Gateway API with up to 128K output tokens.
Capabilities
Input Modalities
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Output Modalities
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Limits
Context Window
400K
Tokens
Input Limit
272K
Tokens
Max Output
128K
Tokens
Pricing
Standard (per 1M tokens)
Input
$1.50
Output
$9.00
Caching (per 1M tokens)
Read
$0.15
Frequently Asked Questions
GPT 5.4 Mini (Fast) by Vercel AI Gateway costs $1.50 per 1M input tokens and $9.00 per 1M output tokens. Cached reads cost $0.15 per 1M tokens.
Model Details
ID
openai/gpt-5.4-mini-fast
Provider
Vercel AI GatewayFamily
gpt-mini
Release Date
Mar 17, 2026
Knowledge Cutoff
Aug 31, 2025
API Integration