Mystery Stealth Model Space Bunny Alpha Hits OpenRouter Free for the Weekend

A deliberately anonymous stealth model, Space Bunny Alpha, appeared on OpenRouter and is completely free for the weekend, drawing community attention. Its specs are aggressive, multiple users have verified its real-world performance, and a hint from the rabbit team remains the only clue to its origins.

Confirmed

• 1M token context window with native multimodal input spanning text, images and video
• Adjustable reasoning effort and tool calling support
• OpenRouter's official page positions it as an anonymous large model: extremely fast inference, strong coding, built by a third-party vendor that chose to stay anonymous
• Available free via OpenRouter and OpenCode for the entire weekend
• User @AlGrigor relayed that someone generated a complete stealth game themed around space bunnies in one shot within 10 minutes, then kept iterating on it
• Developer @iamfakhrealam tested it: given only an ASCII wireframe as the full spec — an exact 250px sidebar, responsive grid, live charts simulating telemetry every 2 seconds — the model reproduced the pixel-level layout in one pass and wired up all state logic including side navigation
• @SimonBalmain relayed the rabbit team's @rabbithmi statement: the model is codenamed space bunny (🐰) and is suspected to be linked to the upcoming rabbit OS3

Unconfirmed

• The developer's identity remains fully anonymous; the rabbit team's statement is the only attribution clue and awaits further confirmation
• Pricing after the free period and official release plans are unknown

Why it matters

• Free access to an anonymous stealth model is rare on OpenRouter and typically signals anonymous load testing or a pre-launch warm-up; the rabbit team's hint offers a new lead toward "backed by rabbit, teasing OS3," though it remains unverified
• The combination of 1M context, multimodal input and tool calling, plus verified rapid game generation and one-shot reproduction of a full UI from an ASCII wireframe, makes it worth trying this weekend

2026-09-26 ~ 2026-09-26 · 7 related posts

Full story(4 episodes)→

• Episode 1: Mystery Stealth Model "Space Bunny" Goes Free Across Platforms, Sparking Community Tests(2026-09-24, 6 posts)
• Episode 2: Stealth Model "Space Bunny Alpha" on OpenRouter Suspected to Be MiniMax M3.1(2026-09-24, 8 posts)
• Episode 3: Mystery Stealth Model Space Bunny Alpha Hits OpenRouter Free for the Weekend(2026-09-26, 7 posts)
• Episode 4: Mystery Model SpaceBunny Tops OpenCode Charts for 5 Days, Identity Unknown(2026-09-27, 5 posts)

• [source] Mystery Stealth Model Space Bunny Alpha Hits OpenRouter Free With 1M Context — heyshrutimishra · 2026-09-26
• [source] Mystery model "Space Bunny" compiles ASCII wireframe into working dashboard first try — iamfakhrealam · 2026-09-26
• Mystery model Space Bunny goes free on OpenRouter: 1M context, one-shot a game in 10 minutes — Al_Grigor · 2026-09-26
• Mystery model 'Space Bunny' goes free on OpenRouter with 1M context and video input — socialwithaayan · 2026-09-26
• [source] Mystery stealth model "space bunny" appears free on OpenRouter, hints at rabbit OS3 — SimonBalmain · 2026-09-26

2 near-duplicate retellings: heyshrutimishra · socialwithaayan