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Space Bunny: The Stealth Model Sparking Speculation

An anonymous stealth model dubbed Space Bunny appeared on OpenRouter with free access and a 1M context window, triggering widespread testing and speculation that it is MiniMax M3.1.

2026-09-24 ~ 2026-09-26 · 3 episodes · 17 posts

Episode 1 · Mystery Stealth Model "Space Bunny" Goes Free Across Platforms, Sparking Community Tests (2026-09-24, 6 posts)

Starting September 24, an unidentified stealth model dubbed "Space Bunny" (shown as Space Bunny Alpha / Stealth Bunny Alpha on some platforms) was made temporarily free across multiple platforms, triggering intense community testing and speculation. Its true identity remains officially unconfirmed, but the rare combination of free access, a 1M-token context, and multimodal capabilities has drawn many developers.

Confirmed

  • opencode announced the model free for one week, highlighting a 1M context window, multimodality, and Zero Data Retention.
  • Cline officially launched the model (as Stealth Bunny Alpha) for free, citing fast reasoning, strong coding, multimodal input, and a 1M-token context.
  • The model is live on OpenRouter (as Space Bunny Alpha) with adjustable reasoning, text/image/video input, and free access via Nous Portal.
  • Command Code offers the same model free on all paid plans, featuring a 1M-token context and multimodality.
  • User omarsar0 tested vision tasks and observed self-verification behavior: with a browser, it opened pages, took screenshots, fixed issues, then declared completion; he also generated a playable 3D game from a hand-drawn sketch.
  • User iamfakhrealam generated a complete game, "Space Hop"—a bunny hopping across neon space rocks collecting carrots—at 60fps with particle trails and a glass-style menu from a single prompt.

Unconfirmed

  • Developer saheedniyi02 speculated the model might be Kimi; this remains personal conjecture with no official confirmation of the model's identity.

Why it matters

  • A free stealth model offering 1M tokens of context, multimodal input, and zero data retention is rare and explains the wave of developer testing.
  • The single-prompt 60fps playable game and self-verification cases showcase the model's ceiling in coding and visual generation, fueling community discussion.

Episode 2 · Stealth Model "Space Bunny Alpha" on OpenRouter Suspected to Be MiniMax M3.1 (2026-09-24, 8 posts)

On September 23, an anonymous third party launched a stealth test model, "Space Bunny Alpha," on OpenRouter and OpenCode, free to use and positioning itself as an extremely fast flash-level reasoning model. Because it identified itself as a MiniMax model when asked in Chinese, the community widely speculated it is the upcoming MiniMax M3.1. The model was later temporarily taken offline, with OpenRouter citing provider-side issues and promising to restore it with an announcement once stable.

Confirmed

  • The model was provided by an anonymous third party, launched on OpenRouter on September 23 as a fast flash reasoning model with free access
  • It supports adjustable reasoning effort, a 1M token context window, and text, image, and video multimodal input, with official messaging emphasizing speed and strong coding capability
  • Reddit users found its chain-of-thought exhibits a typical "caveman mode" style—reasoning in ultra-terse expressions that save CoT tokens
  • A user tested it by building an immersive 3D e-commerce site, validating its coding ability
  • The model was temporarily taken offline; OpenRouter said the issue was on the provider's side and it would be restored and announced once stable

Unconfirmed

  • Whether the model is actually MiniMax M3.1 remains speculation, based mainly on its Chinese-language self-identification and community fingerprinting; leaker @koltregaskes noted it has not been fully tested

Why it matters

  • Stealth launches are a common way for vendors to stress-test new models before release; if Space Bunny Alpha is indeed MiniMax M3.1, it suggests MiniMax's next-generation model will focus on ultra-long context, multimodality, and cost-efficient reasoning
  • The "caveman mode" chain-of-thought demonstrates a technical route of reducing reasoning token costs by compressing CoT expressions—worth watching to see if it ships in the official release

Episode 3 · Mystery Stealth Model Space Bunny Offers Free 1M Context (2026-09-26, 3 posts)

An anonymous multimodal model, Space Bunny Alpha, is free on OpenRouter and OpenCode with a 1M-token context, and one user generated a complete stealth game in 10 minutes.