Claude Sonnet 5.5 vs Space Bunny Alpha (Stealth)
A direct, empirical evaluation of Claude Sonnet 5.5 (Anthropic) against Space Bunny Alpha (Stealth) (MiniMax (Unannounced Stealth Release via OpenRouter)).
Claude Sonnet 5.5
Developed by Anthropic · Proprietary Frontier Dynamic Hybrid Reasoner parameters
Terminal-Bench 4.0 execution (70.6%), SWE-bench Verified coding (82.4%), GitHub Copilot multi-file edits, and low-latency autonomous agentic coding at $2/$10 pricing.
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 Sonnet 5.5 | Space Bunny Alpha (Stealth) |
|---|---|---|
| SWE-bench Verified | 82.4% | 65.4% |
| MMLU-Pro | 88.4% | 86.2% |
| MATH-500 | 95.2% | 92.8% |
| Context Window | 1,000,000 tokens | 1,000,000 tokens |
| Input Pricing (per 1M) | $2.00 | $0.00 |
| Output Pricing (per 1M) | $10.00 | $0.00 |