MiniMax M3.1 Flash is generally available at $0.15 input
1M context, $0.15 input, and weights now on Hugging Face.
MiniMax made M3.1 Flash generally available on October 19, 2026, through the MiniMax API, its M Plan subscription and the MiniMax Code app. On MiniMax's API it costs $0.15 input and $0.60 output per million tokens, with cache reads at $0.015.
What changed
- The API model ID is
MiniMax-M3.1-Flash. - MiniMax lists a context window of up to 1M tokens, with text, image and video input and text output.
- The weights are now public on Hugging Face as
MiniMaxAI/MiniMax-M3.1-Flash. MiniMax's October 19 post said they would come later. - The model card describes a mixture-of-experts model with about 428B total and 23B active parameters.
- MiniMax says an early version ran anonymously as Space Bunny.
MiniMax says overall usage cost on agent tasks is 70% lower than its previous model. That is MiniMax's own figure, not a unit-price comparison.
License
The weights use the MiniMax Community License. It allows non-commercial use free of charge. Commercial use requires a visible "Built with MiniMax M3.1-Flash" credit and a one-time notice to MiniMax. Products or services above $20 million in yearly revenue need prior written authorization from MiniMax.
Pricing
Prices per million tokens on MiniMax's API:
| Item | Price |
|---|---|
| Input | $0.15 |
| Cached input | $0.015 |
| Output | $0.60 |
RouterPlus lists MiniMax M3.1 Flash on 1 provider. Prices per million tokens, from the live catalog on October 31, 2026:
| Provider | Input | Cached input | Output |
|---|---|---|---|
| StreamLake | $0.15 | $0.015 | $0.60 |
What to do
- On RouterPlus, the model ID is
minimax/minimax-m3.1-flash, called with one API key athttps://api.routerplus.com/v1. Sign up at app.routerplus.com/login and call the API right away. - RouterPlus does not have a MiniMax M3.1 Flash model page yet. Browse every model on the RouterPlus models page.