Microsoft AI ships seven in-house MAI models, including an Excel-tuned variant that matches GPT-5.4 at 10x efficiency.

Microsoft's "hill-climbing machine" lineup is now reachable via OpenRouter, Fireworks, and Baseten, and it's distinct from the earlier MAI coding models that went into Copilot. The pattern is task-specialized models that are cheap to run, and Microsoft's continued push to depend less on OpenAI. For builders, it widens the field of efficient specialized models you can route to through standard layers.