Together AI Upgrade & Migration Overview Together AI provides an OpenAI-compatible inference platform hosting 100+ open-source models (Llama, Mixtral, Qwen, FLUX) with fine-tuning and batch inference capabilities. The API lives at and follows OpenAI's chat completions format. Tracking model deprecations and API changes matters because Together regularly retires older model versions, updates model IDs when weights are refreshed, and changes fine-tuning job schemas — causing silent failures when a model ID that worked yesterday returns today with no advance warning in the response. Version Dete…