The A.I. Daily
Meta's Muse appears to use OpenAI model muse-special
A developer found a subagent model labeled azure/muse-special in Meta's Muse logs, with an encrypted payload and tool-call IDs matching OpenAI's Responses API. Muse's model catalogue also lists GPT-5.5, GPT-5.6, Claude and Kimi via third-party routes.