Claude Opus 5.5 vs Space Bunny Alpha (Stealth)
A direct, empirical evaluation of Claude Opus 5.5 (Anthropic) against Space Bunny Alpha (Stealth) (MiniMax (Unannounced Stealth Release via OpenRouter)).
Claude Opus 5.5
Developed by Anthropic · Proprietary Frontier Reasoner parameters
Autonomous enterprise codebase migrations, GitHub Copilot multi-file edits, SWE-bench Pro issue resolution (89.9%), and CodeRabbit automated reviews.
Space Bunny Alpha (Stealth)
Developed by MiniMax (Unannounced Stealth Release via OpenRouter) · Proprietary Omni-Modal Frontier Architecture parameters
Massive 512K output codebases, single-shot 3D voxel world generation, native audio/video multimodal debugging, and high-context software synthesis.
| Metric | Claude Opus 5.5 | Space Bunny Alpha (Stealth) |
|---|---|---|
| SWE-bench Verified | 89.9% | 65.4% |
| MMLU-Pro | 92.4% | 86.2% |
| MATH-500 | 97.2% | 92.8% |
| Context Window | 500,000 tokens | 1,000,000 tokens |
| Input Pricing (per 1M) | $4.00 | $0.00 |
| Output Pricing (per 1M) | $20.00 | $0.00 |