MiniMax M-series Production Wiring OpenAI-compatible chat-completion endpoint at with the M2.7-highspeed reasoning model (premium tier as of 2026-04-29). LOOKS LIKE OPENAI but silently drops 6 OpenAI parameters and exposes reasoning traces inside . Beyond chat-completion, the API is MiniMax-native (different URLs, different body shapes, different error envelopes — HTTP 200 + instead of HTTP 4xx). The model itself is a competent qualitative judge + theory explainer + tool orchestrator for finance/quant work, but cannot do raw math on realistic data sizes (saturates reasoning budget) and halluc…