Claude Fable 5.1 vs Gemini 4 Argon
A direct, empirical evaluation of Claude Fable 5.1 (Anthropic) against Gemini 4 Argon (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 Argon
Developed by Google DeepMind · Frontier Coding & Security Engine on TPU v6e Ironclad parameters
Automated GitHub issue resolution (78.4% SWE-bench Verified), cybersecurity exploit auditing (91.4% CyberSecBench), 2M token context buffer, and aggressive $1.20/$4.80 API pricing.
| Metric | Claude Fable 5.1 | Gemini 4 Argon |
|---|---|---|
| SWE-bench Verified | 82.8% | 78.4% |
| MMLU-Pro | 92.4% | 93.6% |
| MATH-500 | 97.9% | 97.6% |
| Context Window | 1,500,000 tokens | 2,000,000 tokens |
| Input Pricing (per 1M) | $12.00 | $1.20 |
| Output Pricing (per 1M) | $60.00 | $4.80 |