MiniMax M3.1 Flash Open Weights: 428B at $0.15/M Tokens

MiniMax published open weights for M3.1 Flash on Hugging Face, a 428-billion-parameter Mixture-of-Experts model priced at $0.15 per million input tokens and aimed at AI agent builders. Independent testing by Artificial Analysis found a 93% hallucination rate for the model, which outputs at more than 200 tokens per second — roughly three times faster than its predecessor, MiniMax M3.

MiniMax published the open weights for M3.1 Flash on Hugging Face today — a 428-billion-parameter Mixture-of-Experts model priced at $0.15 per million input tokens and built specifically for AI agent builders. Before you wire it into your next pipeline, there is one number worth knowing: 93%. That is the hallucination rate Artificial Analysis found in independent testing. Fast, cheap, and worryingly confident about things it does not know. Fast and Cheap Where It Counts The model’s practical appeal is straightforward. At 200-plus tokens per second output — roughly three times faster than its predecessor, MiniMax M3 — and with a … The post