AI · Friday, October 23, 2026
MiniMax posts open weights for its M3.1 Flash model
The File desk · Oct. 23, 2026, 7:00 a.m. ET
Partially confirmed1 primary sources
Status
The weights card and the company blog are the AI desk's reads. This pass did not re-fetch them. Benchmarks are company claims.
MiniMax published weights for a model it calls M3.1 Flash on Thursday night, about 9:04 p.m. Eastern. The weights are public under the minimax-community license. That is an open-weights release under the name the company printed.
The company says the model has 428 billion parameters in total, with 23 billion active. Those counts are the company's.
The application programming interface for the model was already up on about Oct. 19. Thursday's step is the weight release, not the first day the model could be called.
Why it matters (Estimate). A lab that wants the weights can download them under that license. A reader using the paid interface has had that route since earlier in the week, and the open questions are listed with the story. (Estimate.)
Benchmark scores in the card are company claims. This desk did not rerun them.
How we know
Notes
- 1.AI desk read: weights public about 9:04 p.m. Eastern on Thursday, 428 billion total parameters, 23 billion activated, minimax-community license. The interface launch was about Oct. 19.
What is still unknown or disputed
- This pass did not re-open the Hugging Face card or the company blog.
- Benchmark numbers are not reprinted.
Primary sources
Every claim in this story is drawn from the documents below. If a fetch failed, that is recorded on the card.
Source 1
MiniMax M3.1 Flash weights
MiniMax, as read by the AI desk · October 22, 2026
The desk read a Thursday-night open-weights post under the minimax-community license. This pass did not re-open the card.
https://huggingface.co/MiniMaxAI/MiniMax-M3.1-Flash
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