As of: 2026-10-20 02:15 CEST.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/m/minimax-m3-1-flash/

# MiniMax-M3.1-Flash

MiniMax, MiniMax-M family. Status: current. Type: reasoning model. Released: 2026-10-19. Training cutoff: not published.

## How to call it

| Provider | Model id | Endpoint | Docs |
|---|---|---|---|
| MiniMax API | `MiniMax-M3.1-Flash` | https://api.minimax.io/anthropic | https://platform.minimax.io |
| OpenRouter |  |  | https://openrouter.ai |
| MiniMax Code (desktop) |  |  | https://agent.minimax.io/download |

## Pricing

- Input: $0.15 per 1M tokens
- Output: $0.60 per 1M tokens
- Cache read: $0.015 per 1M tokens
- Unit as published: per 1M tokens (USD), flat rate
- Source: https://www.minimax.io/blog/minimax-m31f
- Last checked: 2026-10-19

## Specs

- Input: text, image
- Output: text
- Context window: not published
- Max output: not published
- Open weights: no
- Licence: proprietary

## What it has not seen

- No published training cutoff. Counted from its release (2026-10-19): at least 0 AI events since (0 major, 0 historic), as of 2026-10-20.
- Everything since September 2026: https://postcutoff.com/since/2026-09/

## What stands out

- Cheap fast agent model: $0.15/$0.60 per 1M tokens, 200+ tokens/s; MiniMax reports DeepSWE v1.1 73.7%, OSWorld V2 61.7, Agents' Last Exam 29.6, CyberGym 82% (self-reported). Source: https://www.minimax.io/blog/minimax-m31f
- Stealth-tested as 'Space Bunny': Ran anonymously on OpenRouter as Space Bunny, #1 by usage for 10 days with 56.7T tokens, before the reveal. Source: https://x.com/OpenRouter/status/2112152045461680591

## Notes

Weights promised for Oct 23, 2026 (MiniMax X post); until then API-only, so open_weights is false and license unknown. Context window and max output not stated at launch. OpenRouter slug not verified. Image input inferred from MiniMax's BabyVision score; not confirmed in docs.

Successor to the plan-only MiniMax-M3.1-Flash-Preview (Sept 27). Same Anthropic-format endpoint as MiniMax-M3.

Sources: https://www.minimax.io/blog/minimax-m31f · https://x.com/MiniMax_AI/status/2112150867868541221

Model page: https://postcutoff.com/m/minimax-m3-1-flash/