MiniMax: MiniMax M3.1 Flash (free)

MiniMax M3.1 Flash (free) is a model from MiniMax that accepts text, image, and video input and returns text. It offers a 1,000,000-token context window and allows up to 524,288 completion tokens, so long documents, extended transcripts, and lengthy generated outputs fit within a single request. It supports tool calling and a reasoning mode. Structured output support is not listed, and the open-weights status is not stated. The model costs nothing for input or output tokens, which makes it a reasonable shortlist candidate for prototyping, high-volume experiments, or multimodal workloads where budget is the main constraint. It has no independent benchmark coverage yet, so its quality relative to paid or other free options is unproven. Teams should run their own evaluations on representative tasks before relying on it. Where structured output is required, they should confirm schema adherence directly rather than assume it.