GPT-6 Astra and Claude Fable 5.1 on xKiro — vision, tools and a 1M-token context

GPT-6 Astra and Claude Fable 5.1 are now available on xKiro. GPT-6 Astra is the OpenAI flagship for demanding end-to-end work, suited to deep research, software engineering and long-horizon agentic tasks, with a context window just over one million tokens. Claude Fable 5.1 is the newest Mythos-class Anthropic model for autonomous knowledge work and coding. Both accept image input, call tools, and expose five reasoning levels from low to max, so you can trade speed for depth on a per-request basis. Call them through the same OpenAI- and Anthropic-compatible endpoints you already use — only the model name changes. Pay-as-you-go, billed from deposited balance.

Models included

• openai/gpt-6-astra
• anthropic/claude-fable-5-1

How to use it

Point any OpenAI- or Anthropic-compatible SDK at the xKiro gateway and pass the model id above. Nothing else changes — the price applies automatically on every call, with no coupon code and no plan change.