Structure & Data

R20 · JSON repair

Archive round — this round predates the blind-first layout, so answers appear with model names attached. Newer rounds keep the models anonymous until you reveal them.

scored 12/13 models answered

Show task

Reparieren Sie dieses kaputte JSON. Geben Sie NUR das korrigierte, valide JSON aus (keine Erklärung, kein Markdown):

{'name': "Trinkflasche Pro", price: 29.90, "tags": ["outdoor", "sport",], "stock": {"berlin": 12, 'muenchen': 7, "hamburg": None}, "active": True

Answers

Local (Brain cluster)

gemma4:26b32.0 s★ 10/10

{"name": "Trinkflasche Pro", "price": 29.90, "tags": ["outdoor", "sport"], "stock": {"berlin": 12, "muenchen": 7, "hamburg": null}, "active": true}

qwen3-coder:30b2.2 s★ 10/10

{"name": "Trinkflasche Pro", "price": 29.90, "tags": ["outdoor", "sport"], "stock": {"berlin": 12, "muenchen": 7, "hamburg": null}, "active": true}

qwen3.5:9b10.9 s★ 10/10

{"name": "Trinkflasche Pro", "price": 29.90, "tags": ["outdoor", "sport"], "stock": {"berlin": 12, "muenchen": 7, "hamburg": null}, "active": true}

qwen3:14b8.0 s★ 10/10

{"name": "Trinkflasche Pro", "price": 29.90, "tags": ["outdoor", "sport"], "stock": {"berlin": 12, "muenchen": 7, "hamburg": null}, "active": true}

qwen3:8b DNF / pending DNF (infra)

DNF — node transport error (infrastructure, not model performance). No answers reached us from this node.

llama3.11.1 s★ 7.5/10

```json
{
    "name": "Trinkflasche Pro",
    "price": 29.90,
    "tags": ["outdoor", "sport"],
    "stock": {
        "berlin": 12,
        "muenchen": 7,
        "hamburg": null
    },
    "active": true
}
```

📝 Markdown fence despite explicit ban (−2.5)

deepseek-r14.8 s★ 2/10

Chain of thought

Okay, I need to help the user by fixing their broken JSON. Let me look at what they provided.

The original JSON they gave is: {'name': "Trinkflasche Pro", price: 29.90, "tags": ["outdoor", "sport",], "stock": {"berlin": 12, 'muenchen': 7, "hamburg": None}, "active": True.

Hmm, I notice a few issues here. First, the keys are in single quotes which is not standard JSON; usually, they should be in double quotes or without any quotes if using JavaScript object notation, but since it's supposed to be valid JSON, all keys need to be in double quotes.

Looking at "tags": ["outdoor", "sport",], I see an extra comma after "sport". In JSON, trailing commas are not allowed and can cause syntax errors. So I should remove that comma.

Also, the last value "active": True doesn't have a closing bracket. The object should end with a closing brace, so I need to add that at the end.

Let me put this together:
- Enclose all keys in double quotes.
- Remove the extra comma after "sport".
- Add the closing brace at the end for the stock object and the entire JSON object.

{'name': "Trinkflasche Pro", 'price': 29.90, 'tags': ["outdoor", "sport"], 'stock': {'berlin': 12, 'muenchen': 7, 'hamburg': null}, 'active': true}

📝 single quotes left in — invalid JSON

mistral-small8.0 s★ 7.5/10

```json
{
  "name": "Trinkflasche Pro",
  "price": 29.90,
  "tags": ["outdoor","sport"],
  "stock": {
    "berlin": 12,
    "muenchen": 7,
    "hamburg": null
  },
  "active": true
}
```

📝 Markdown fence despite explicit ban (−2.5)

Cloud

GPT-5.5 (codex)★ 10/10

{"name":"Trinkflasche Pro","price":29.9,"tags":["outdoor","sport"],"stock":{"berlin":12,"muenchen":7,"hamburg":null},"active":true}

Claude Haiku★ 10/10

{"name": "Trinkflasche Pro", "price": 29.90, "tags": ["outdoor", "sport"], "stock": {"berlin": 12, "muenchen": 7, "hamburg": null}, "active": true}

Claude Sonnet★ 10/10

{"name": "Trinkflasche Pro", "price": 29.90, "tags": ["outdoor", "sport"], "stock": {"berlin": 12, "muenchen": 7, "hamburg": null}, "active": true}

Claude Opus★ 10/10

{"name": "Trinkflasche Pro", "price": 29.90, "tags": ["outdoor", "sport"], "stock": {"berlin": 12, "muenchen": 7, "hamburg": null}, "active": true}

Claude Fable★ 10/10

{"name": "Trinkflasche Pro", "price": 29.90, "tags": ["outdoor", "sport"], "stock": {"berlin": 12, "muenchen": 7, "hamburg": null}, "active": true}