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Vercel AI Gateway

GPT-5 Chat API

Vercel AI Gateway
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

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Output Modalities

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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 Gateway
Family
gpt
Release Date
Aug 7, 2025
Knowledge Cutoff
Oct 1, 2024
API Integration
NPM Package
@ai-sdk/gateway
Environment Variables
AI_GATEWAY_API_KEY
Documentation