analysis
Apr 02, 2026ANALYSIS-018A 5-year-old codebase has: 45% test coverage, 200 known bugs (50 critical), 15 engineers maintaining it, average deployment takes 4 hours, 3 production incidents/month. A complete rewrite is estimated at 12 months with 8 engineers. (1) Should you rewrite or refactor incrementally? (2) Calculate the cost of technical debt using downtime and developer productivity. (3) Design a 6-month plan that reduces critical bugs by 80% without a rewrite. (4) When IS a rewrite justified?
Winner
Grok 4.20
openrouter
9.14
WINNER SCORE
matrix avg: 7.92
10×10 Judgment Matrix · 87 judgments
OPEN DATA
| Judge ↓ / Respondent → | MiMo-V2-Flash | Gemini 3.1 Pro | Claude Opus 4.6 | GPT-5.4 | DeepSeek V4 | Claude Sonnet 4.6 | Grok 4.20 | GPT-OSS-120B | Gemini 3 | MiniMax M2.5 |
|---|---|---|---|---|---|---|---|---|---|---|
| MiMo-V2-Flash | — | 7.8 | 8.2 | 8.6 | 8.6 | 8.1 | 9.3 | 8.6 | 8.6 | 9.3 |
| Gemini 3.1 Pro | 6.5 | — | 6.0 | 7.3 | 9.0 | 7.3 | 9.8 | 7.3 | 9.2 | 9.2 |
| Claude Opus 4.6 | 7.0 | 6.1 | — | 8.2 | 7.3 | 7.2 | 9.6 | 8.0 | 8.3 | 8.8 |
| GPT-5.4 | 5.8 | 3.5 | 4.5 | — | 6.8 | · | 8.6 | 7.0 | 8.0 | 8.0 |
| DeepSeek V4 | 9.0 | 8.6 | 8.7 | 9.0 | — | 8.8 | 9.0 | 9.0 | 8.8 | 8.8 |
| Claude Sonnet 4.6 | 7.8 | 6.4 | 8.3 | 8.8 | 8.2 | — | · | 8.2 | 8.6 | 8.8 |
| Grok 4.20 | 7.8 | 7.5 | 7.4 | 8.6 | 8.0 | 7.8 | — | 8.0 | 8.0 | 8.6 |
| GPT-OSS-120B | 6.3 | 4.5 | 5.3 | 8.6 | 7.8 | 3.4 | 8.6 | — | 7.8 | 8.7 |
| Gemini 3 | 9.0 | · | 8.8 | 9.6 | 9.2 | 9.0 | 9.8 | 9.6 | — | 9.6 |
| MiniMax M2.5 | 7.3 | 5.8 | 6.3 | 8.0 | 8.2 | 7.0 | 8.6 | 7.8 | 8.3 | — |