# Setting LLM API Keys

You can use either OpenAI or OpenRouter (or both) for LLM reasoning. Set whichever keys you have.

## Option A: OpenRouter (GPT-5-nano, etc.)

### Quick Setup (Current Session)
```powershell
$env:OPENROUTER_API_KEY = "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"
$env:OPENROUTER_MODEL = "gpt-5-nano"   # optional override
```

### Make It Permanent
```powershell
[System.Environment]::SetEnvironmentVariable("OPENROUTER_API_KEY", "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", "User")
[System.Environment]::SetEnvironmentVariable("OPENROUTER_MODEL", "gpt-5-nano", "User")
```

### .env Example
```env
OPENROUTER_API_KEY=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
OPENROUTER_MODEL=gpt-5-nano
```

### Hugging Face Spaces
- `OPENROUTER_API_KEY`: `sk-or-...`
- `OPENROUTER_MODEL`: `gpt-5-nano` (optional, defaults to this)

---

## Option B: OpenAI (GPT-4o, etc.)

### Quick Setup
```powershell
$env:OPENAI_API_KEY = "sk-your-openai-api-key"
```

Or run:
```powershell
.\set_api_key.ps1
```

### Make It Permanent
```powershell
[System.Environment]::SetEnvironmentVariable("OPENAI_API_KEY", "sk-your-openai-api-key", "User")
```

### .env Example
```env
OPENAI_API_KEY=sk-your-openai-api-key
```

### Hugging Face Spaces
- `OPENAI_API_KEY`: `sk-...`

---

## Verification

Run:
```powershell
python test_env.json.py
```

You should see at least one of the LLM keys marked as `set`, and `llm_enabled: true`.