# The Multivac — Evaluation Report

**Evaluation ID:** EVAL-20260207-135720
**Date:** Jan 19, 2026
**Category:** code
**Question ID:** CODE-002

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## Question

Write a Python function that parses deeply nested JSON with the following requirements:
1. Handle missing keys gracefully (return None, don't crash)
2. Support a path syntax like "user.profile.settings.theme"
3. Handle arrays with index syntax like "users[0].name"
4. Return a typed result with proper error messages for debugging
5. Handle circular reference detection

Include type hints and comprehensive docstrings.

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## Winner

**GPT-5.2-Codex** (OpenAI)
- Winner Score: 9.29
- Matrix Average: 6.70
- Total Judgments: 90

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## Rankings

| Rank | Model | Provider | Avg Score | Judgments |
|------|-------|----------|-----------|----------|
| 1 | GPT-5.2-Codex | OpenAI | 9.29 | 8 |
| 2 | Grok Code Fast | xAI | 8.71 | 7 |
| 3 | Grok 3 (Direct) | xAI | 8.26 | 7 |
| 4 | DeepSeek V3.2 | DeepSeek | 8.13 | 8 |
| 5 | Gemini 3 Flash Preview | Google | 7.99 | 7 |
| 6 | Claude Opus 4.5 | Anthropic | 7.28 | 9 |
| 7 | Claude Sonnet 4.5 | Anthropic | 6.88 | 8 |
| 8 | GLM-4-7 | Zhipu | 3.73 | 5 |
| 9 | Gemini 3 Pro Preview | Google | 3.47 | 5 |
| 10 | MiniMax M2 | MiniMax | 3.25 | 4 |

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## 10×10 Judgment Matrix

Rows = Judge, Columns = Respondent. Self-judgments excluded (—).

| Judge ↓ / Resp → | Grok Code Fast | GLM-4-7 | Claude Opus | Gemini 3 | Claude Sonnet | Gemini 3 | MiniMax M2 | DeepSeek V3.2 | GPT-5.2-Codex | Grok 3 |
|---|---|---|---|---|---|---|---|---|---|---|
| Grok Code Fast | — | 1.0 | 7.0 | 8.9 | 7.0 | 2.0 | 2.0 | 9.3 | 9.8 | 9.8 |
| GLM-4-7 | 0.0 | — | 6.0 | 0.0 | 7.6 | 0.0 | 0.0 | 7.3 | 9.6 | 0.0 |
| Claude Opus | 8.2 | 0.9 | — | 7.8 | 6.8 | 0.9 | 0.9 | 7.4 | 9.0 | 7.6 |
| Gemini 3 | 9.6 | 0.0 | 8.8 | — | 8.0 | 0.0 | 0.0 | 9.6 | 9.8 | 9.6 |
| Claude Sonnet | 8.6 | 0.5 | 7.7 | 7.0 | — | 0.5 | 0.5 | 7.0 | 9.0 | 7.8 |
| Gemini 3 | 0.0 | 0.0 | 6.3 | 0.0 | 0.0 | — | 0.0 | 0.0 | 0.0 | 0.0 |
| MiniMax M2 | 8.6 | 8.0 | 6.6 | 8.6 | 5.8 | 6.3 | — | 8.7 | 9.0 | 9.3 |
| DeepSeek V3.2 | 8.6 | 8.3 | 9.6 | 8.2 | 8.6 | 7.6 | 9.6 | — | 8.6 | 9.0 |
| GPT-5.2-Codex | 8.0 | 0.0 | 5.0 | 6.8 | 2.6 | 0.0 | 0.0 | 6.2 | — | 4.8 |
| Grok 3 | 9.6 | 0.0 | 8.4 | 8.6 | 8.6 | 0.0 | 0.0 | 9.6 | 9.6 | — |

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## Methodology

- **10×10 Blind Peer Matrix:** All models answer the same question, then all models judge all responses.
- **5 Criteria:** Correctness, completeness, clarity, depth, usefulness (each scored 1–10).
- **Self-judgments excluded:** Models do not judge their own responses.
- **Weighted Score:** Composite of all 5 criteria.

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## Citation

The Multivac (2026). Blind Peer Evaluation: CODE-002. app.themultivac.com

## License

Open data. Free to use, share, and build upon. Please cite The Multivac when using this data.

Download raw JSON: https://app.themultivac.com/api/evaluations/EVAL-20260207-135720/results
Full dataset: https://app.themultivac.com/dashboard/export