Claude Fable 5.1 vs Gemini 4 Pro (Projected)
A direct, empirical evaluation of Claude Fable 5.1 (Anthropic) against Gemini 4 Pro (Projected) (Google DeepMind).
Claude Fable 5.1
Developed by Anthropic · Proprietary Frontier parameters
Full-repository software refactoring, agentic tool workflows, formal verification, and 1.5M-token needle retrieval.
Gemini 4 Pro (Projected)
Developed by Google DeepMind · Proprietary Omni-Modal Unified Diffusion Transformer parameters
Repository-scale 10M-token refactoring, automated formal theorem proving, parametric SVG and 3D GLTF asset synthesis, and zero-hallucination execution.
| Metric | Claude Fable 5.1 | Gemini 4 Pro (Projected) |
|---|---|---|
| SWE-bench Verified | 82.8% | 75.8% |
| MMLU-Pro | 92.4% | 92.4% |
| MATH-500 | 97.9% | 97.2% |
| Context Window | 1,500,000 tokens | 2,000,000 - 10,000,000 tokens |
| Input Pricing (per 1M) | $12.00 | $1.50 |
| Output Pricing (per 1M) | $60.00 | $7.50 |