Cat Jam reasoning model now available in stealth on AI Gateway
Cat Jam, a reasoning model optimized for coding and agentic tasks with low-latency inference, is now available as a free stealth release on Vercel's AI Gateway. It supports function calling, structured outputs, and configurable reasoning efforts, and integrates with popular IDEs and frameworks via the stealth/cat-jam model identifier.
is now available on as a stealth model, free to use during the stealth period.Cat JamAI Gateway
Cat Jam is a reasoning model for coding and agentic tasks, with low-latency inference. It supports , so agents can connect it to your own tools, and 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 , , , , and reasoning efforts.function callingstructured outputslowmediumhighxhighmax
(ZDR) is not available for this model. Prompts may be retained for safety reasons.Zero Data Retention
Cat Jam works with the , the OpenAI-compatible and APIs, the , and connected to AI Gateway. Use as the model name:AI SDKChat CompletionsResponsesAnthropic-compatible Messages APIcoding agentsstealth/cat-jam
To use it in Claude Code, Codex, Cursor, and more, install the latest Vercel CLI and run setup:
Then select in the agent. See the for details.stealth/cat-jamcoding agents guide
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 , , , and more.custom reportingbudgets for API keysrouting rules
AI Gateway reflects provider pricing with no markup and does not charge a platform fee on inference, including on (BYOK) requests.Bring Your Own Key
You can view available on AI Gateway.all language models
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