MiniMax launches public beta of M3.1-Flash, a lightweight model matching Opus 5.5 on frontend generation

MiniMax has opened a public beta for M3.1-Flash, a lightweight native multimodal model in its M3 series. It supports a 1M-token context window and was trained from pretraining on mixed text, image, and video semantic spaces. In tests cited by the company, it generated teaching animations, procedural motion effects, interactive web pages, and pixel-style Canvas animations, with performance on several tasks matching Claude Opus 5.5; MiniMax also says it can proactively fill in design details.

Separately, MiniMax said its H3 video model has surpassed 24 million downloads in the month since being open-sourced, with more than 300 public derivative models.

Original sources (Chinese)