# The Multivac — Evaluation Report

**Evaluation ID:** EVAL-20260207-134346
**Date:** Mar 04, 2026
**Category:** reasoning
**Question ID:** REASON-008

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## Question

Three bidders (A, B, C) are in a first-price sealed-bid auction for an item. Their private valuations are:
- A values it at $100
- B values it at $80  
- C values it at $60

Each bidder knows only their own valuation but knows the valuations are uniformly distributed between $0 and $100 for all bidders.

1. What is each bidder's optimal strategy?
2. What is the expected revenue for the seller?
3. How would this change in a second-price auction?
4. If the bidders could collude, what would happen?

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## Winner

**GPT-OSS-120B** (OpenAI)
- Winner Score: 9.52
- Matrix Average: 8.32
- Total Judgments: 90

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## Rankings

| Rank | Model | Provider | Avg Score | Judgments |
|------|-------|----------|-----------|----------|
| 1 | GPT-OSS-120B | OpenAI | 9.52 | 7 |
| 2 | MiMo-V2-Flash | Xiaomi | 9.51 | 6 |
| 3 | Claude Opus 4.5 | Anthropic | 9.17 | 6 |
| 4 | Gemini 3 Flash Preview | Google | 9.16 | 6 |
| 5 | Claude Sonnet 4.5 | Anthropic | 9.00 | 7 |
| 6 | Grok 3 (Direct) | xAI | 8.97 | 6 |
| 7 | Gemini 2.5 Flash | Google | 8.81 | 6 |
| 8 | DeepSeek V3.2 | DeepSeek | 8.78 | 6 |
| 9 | OLMo Think | Allen AI | 5.30 | 3 |
| 10 | Gemini 3 Pro Preview | Google | 4.97 | 3 |

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## 10×10 Judgment Matrix

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

| Judge ↓ / Resp → | Claude Opus | Gemini 3 | MiMo-V2-Flash | Claude Sonnet | DeepSeek V3.2 | Gemini 3 | Gemini 2.5 | GPT-OSS-120B | OLMo Think | Grok 3 |
|---|---|---|---|---|---|---|---|---|---|---|
| Claude Opus | — | 9.2 | 9.4 | 8.4 | 8.8 | 0.0 | 8.2 | 9.2 | 0.0 | 8.4 |
| Gemini 3 | 9.8 | — | 10.0 | 10.0 | 9.8 | 0.0 | 9.8 | 10.0 | 0.0 | 9.8 |
| MiMo-V2-Flash | 9.0 | 8.6 | — | 9.0 | 8.3 | 7.6 | 8.2 | 9.0 | 6.6 | 8.2 |
| Claude Sonnet | 9.2 | 9.4 | 9.4 | — | 8.4 | 0.7 | 9.2 | 9.8 | 0.7 | 9.0 |
| DeepSeek V3.2 | 9.0 | 9.7 | 9.4 | 9.4 | — | 6.6 | 9.0 | 9.2 | 8.6 | 9.2 |
| Gemini 3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | — | 0.0 | 0.0 | 0.0 | 0.0 |
| Gemini 2.5 | 9.0 | 9.4 | 9.7 | 9.0 | 9.0 | 0.0 | — | 10.0 | 0.0 | 9.2 |
| GPT-OSS-120B | 0.0 | 0.0 | 0.0 | 8.6 | 0.0 | 0.0 | 0.0 | — | 0.0 | 0.0 |
| OLMo Think | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | — | 0.0 |
| Grok 3 | 9.0 | 8.7 | 9.2 | 8.7 | 8.4 | 0.0 | 8.4 | 9.4 | 0.0 | — |

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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: REASON-008. 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-20260207-134346/results
Full dataset: https://app.themultivac.com/dashboard/export