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Vercel AI Gateway

S1 API

Vercel AI Gateway
About

S1 is a high-performance LLM available via the Vercel AI Gateway API, ideal for scalable text generation and natural language processing. This model delivers available completely free of charge. Access S1 via the Vercel AI Gateway API with reliable low-latency inference.

Capabilities

Input Modalities

text

Output Modalities

audio
Reasoning
No
Structured Output
No
Tool Use
No
WeightsClosed
Temperature
Fixed
Attachment
Not Supported
Limits
Context Window
N/A

Tokens

Input Limit
N/A

Tokens

Max Output
N/A

Tokens

Pricing

Standard (per 1M tokens)

Input
Free
Output
Free
Frequently Asked Questions

S1 by Vercel AI Gateway costs Free per 1M input tokens and Free per 1M output tokens.

Model Details
ID
fish-audio/s1
Provider
Vercel AI Gateway
Family
o
Release Date
Oct 20, 2025
Knowledge Cutoff
N/A
API Integration
NPM Package
@ai-sdk/gateway
Environment Variables
AI_GATEWAY_API_KEY
Documentation