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Cat Jam is now available in stealth for free on AI Gateway

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Cat Jam is now available on AI Gateway as a stealth model, free to use during the stealth period.

Cat Jam is a reasoning model for coding and agentic tasks, with low-latency inference. It supports function calling, so agents can connect it to your own tools, and structured outputs that follow a JSON schema you supply. Responses include the model's reasoning text alongside the answer. Cat Jam takes text input only. Cat Jam supports low, medium, high, xhigh, and max reasoning efforts.

Zero Data Retention (ZDR) is not available for this model. Prompts may be retained for safety reasons.

Cat Jam works with the AI SDK, the OpenAI-compatible Chat Completions and Responses APIs, the Anthropic-compatible Messages API, and coding agents connected to AI Gateway. Use stealth/cat-jam as the model name:

import { streamText } from 'ai';


const result = streamText({
  model: 'stealth/cat-jam',
  prompt: 'Write a TypeScript function that retries fetch with exponential backoff.',
});
View model details

To use it in Claude Code, Codex, Cursor, and more, install the latest Vercel CLI and run setup:

npx vercel ai-gateway setup

Then select stealth/cat-jam in the agent. See the coding agents guide for details.

Try Cat Jam in the model playground.

AI Gateway provides a unified API for calling models, tracking usage and cost, and configuring retries, failover, and performance optimizations for higher-than-provider uptime. It includes built-in custom reporting, budgets for API keys, routing rules, and more.

AI Gateway reflects provider pricing with no markup and does not charge a platform fee on inference, including on Bring Your Own Key (BYOK) requests.

You can view all language models available on AI Gateway.