MiniMax M3.1 Flash Playground: The Model Behind Space Bunny

Space Bunny was MiniMax M3.1 Flash

On 19 October 2026 MiniMax confirmed that Space Bunny — the anonymous OpenRouter model that ran as stealth/space-bunny-alpha — was an early build of MiniMax M3.1 Flash. The free stealth listing ended on 5 October. The official model is multimodal (text, image, and video in; text out) with a 1 million token context window, aimed at coding, agent work, and long documents.

Try MiniMax M3.1 Flash without an API key

spacebunny.me is an independent playground, not a MiniMax or OpenRouter site. You sign up, get free credits, and chat through our backend. The OpenRouter key never reaches the browser. One-click demos cover the two jobs people search for: paste a stack trace and get a patch, or summarize a long RFC. A live estimate shows credits before you send.

What the official model is good at

• Coding: bug fixes, small diffs, and multi-step software tasks.
• Long context: RFCs and design docs, if you put the question above the paste.
• Multimodal input: screenshots alongside the stack trace.
• Speed: MiniMax positions M3.1 Flash as the efficient tier, with list price $0.15 / $0.60 per million input / output tokens after the launch window.

Credits on this playground

1 credit = 100 tokens (input plus output). New accounts get 200 credits. After MiniMax’s free window, output costs $0.60 per million tokens upstream. The $10 pack is 16,000 credits, Starter is $9/month for 15,000, and Pro is $29/month for 48,000 — about 10× that upstream cost if every token is output. This site still hard-caps each request around 100k tokens.

Start here

• Paste stack trace AI — fix a TypeScript error with a minimal patch.
• AI summarize RFC — long document summary with credit control.
• Open the playground and pick Paste error → patch or Long doc → summary.