GPT-5 Chat API
About
Build advanced reasoning agents with GPT-5 Chat, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $1.25/1M input and $10.00/1M output tokens, native tool calling support. Access GPT-5 Chat via the Vercel AI Gateway API with up to 16K output tokens.
Capabilities
Input Modalities
textimagepdf
Output Modalities
text
Reasoning
Yes
Structured Output
No
Tool Use
Yes
WeightsClosed
Temperature
Adjustable
Attachment
Supported
Limits
Context Window
128K
Tokens
Input Limit
112K
Tokens
Max Output
16K
Tokens
Pricing
Standard (per 1M tokens)
Input
$1.25
Output
$10.00
Caching (per 1M tokens)
Read
$0.13
Frequently Asked Questions
GPT-5 Chat by Vercel AI Gateway costs $1.25 per 1M input tokens and $10.00 per 1M output tokens. Cached reads cost $0.13 per 1M tokens.
Model Details
ID
openai/gpt-5-chat
Provider
Vercel AI GatewayFamily
gpt
Release Date
Aug 7, 2025
Knowledge Cutoff
Oct 1, 2024
API Integration