# The Multivac — Evaluation Report

**Evaluation ID:** EVAL-20260318-161727
**Date:** Mar 18, 2026
**Category:** code
**Question ID:** EVAL-20260318-161727

---

## Question

This Go code processes orders concurrently but occasionally produces incorrect totals. Find and fix all concurrency issues.

```go
package main

import (
    "fmt"
    "sync"
)

type OrderProcessor struct {
    totalRevenue float64
    orderCount   int
    errors       []string
}

func (op *OrderProcessor) ProcessOrder(amount float64, wg *sync.WaitGroup) {
    defer wg.Done()

    if amount <= 0 {
        op.errors = append(op.errors, fmt.Sprintf("invalid amount: %.2f", amount))
        return
    }

    op.totalRevenue += amount
    op.orderCount++
}

func main() {
    op := &OrderProcessor{}
    var wg sync.WaitGroup

    orders := []float64{99.99, 149.50, -10.00, 299.99, 49.99, 0, 199.99}

    for _, amount := range orders {
        wg.Add(1)
        go op.ProcessOrder(amount, &wg)
    }

    wg.Wait()
    fmt.Printf("Total: $%.2f from %d orders\n", op.totalRevenue, op.orderCount)
}
```

---

## Winner

**GPT-5.4** (openrouter)
- Winner Score: 9.91
- Matrix Average: 9.52
- Total Judgments: 55

---

## Rankings

| Rank | Model | Provider | Avg Score | Judgments |
|------|-------|----------|-----------|----------|
| 1 | GPT-5.4 | openrouter | 9.91 | 7 |
| 2 | Claude Sonnet 4.6 | openrouter | 9.80 | 7 |
| 3 | MiniMax M2.7 | openrouter | 9.71 | 7 |
| 4 | MiniMax M1 | openrouter | 9.69 | 7 |
| 5 | MiniMax M2 | MiniMax | 9.45 | 7 |
| 6 | MiniMax-01 | openrouter | 9.34 | 7 |
| 7 | MiniMax M2.5 | openrouter | 9.32 | 7 |
| 8 | MiniMax M2.1 | openrouter | 8.97 | 6 |

---

## 10×10 Judgment Matrix

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

| Judge ↓ / Resp → | MiniMax M2.7 | MiniMax M2.5 | MiniMax M2.1 | MiniMax M2 | MiniMax M1 | MiniMax-01 | Claude Sonnet | GPT-5.4 |
|---|---|---|---|---|---|---|---|---|
| MiniMax M2.7 | — | 9.3 | 8.8 | 9.6 | 9.8 | 10.0 | 9.8 | 10.0 |
| MiniMax M2.5 | 10.0 | — | 9.8 | 10.0 | 9.8 | 10.0 | 9.6 | 9.8 |
| MiniMax M2.1 | 10.0 | 9.8 | — | 10.0 | 9.8 | 9.8 | 10.0 | 10.0 |
| MiniMax M2 | 10.0 | 10.0 | · | — | 10.0 | 9.0 | 10.0 | 10.0 |
| MiniMax M1 | 9.8 | 9.6 | 8.6 | 9.6 | — | 9.3 | 10.0 | 10.0 |
| MiniMax-01 | 9.6 | 9.6 | 9.6 | 9.0 | 9.6 | — | 9.8 | 9.8 |
| Claude Sonnet | 9.6 | 9.0 | 8.4 | 9.6 | 9.8 | 8.8 | — | 9.8 |
| GPT-5.4 | 9.0 | 8.1 | 8.6 | 8.4 | 9.0 | 8.4 | 9.4 | — |

---

## 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.

---

## Citation

The Multivac (2026). Blind Peer Evaluation: EVAL-20260318-161727. 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-20260318-161727/results
Full dataset: https://app.themultivac.com/dashboard/export