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Vercel AI Gateway

Claude Fable 5 API

Vercel AI Gateway
About

Build advanced reasoning agents with Claude Fable 5, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $10.00/1M input and $50.00/1M output tokens, native tool calling support. Access Claude Fable 5 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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Reasoning
Yes
Structured Output
No
Tool Use
Yes
WeightsClosed
Temperature
Adjustable
Attachment
Supported
Limits
Context Window
1.0M

Tokens

Input Limit
1.0M

Tokens

Max Output
128K

Tokens

Pricing

Standard (per 1M tokens)

Input
$10.00
Output
$50.00

Caching (per 1M tokens)

Read
$1.00
Write
$12.50
Frequently Asked Questions

Claude Fable 5 by Vercel AI Gateway costs $10.00 per 1M input tokens and $50.00 per 1M output tokens. Cached reads cost $1.00 per 1M tokens. Cache writes cost $12.50 per 1M tokens.

Model Details
ID
anthropic/claude-fable-5
Provider
Vercel AI Gateway
Family
claude
Release Date
Jun 9, 2026
Knowledge Cutoff
Jan 31, 2026
API Integration
NPM Package
@ai-sdk/gateway
Environment Variables
AI_GATEWAY_API_KEY
Documentation