Claude Fable 5.2, Anthropic's newest model, is now available on the CubePath AI Gateway. It is built for demanding reasoning and long agent sessions, and you use it with the same token and balance as every other model on the gateway.
Use anthropic/claude-fable-5-2 with the OpenAI SDK, or claude-fable-5-2 with the Anthropic SDK and Claude Code. The model decides how much to think on each request, and the reasoning effort sets how deep it goes. Prompt caching and tools work as usual.