List models

curl "https://api.stynar.com/v2/ai/models" \
  -H "Authorization: Bearer esk_your_key_here"

{
  "defaultModel": "gpt-6-luna",
  "models": [
    {
      "id": "gpt-6-luna",
      "provider": "openai",
      "label": "gpt-6-luna",
      "tier": "Free",
      "description": "Fast and free. Good for everyday AI Agent turns, quick edits, and AI-personalized emails.",
      "availableFor": [
        "email",
        "agent"
      ],
      "chatCredits": 1,
      "emailCredits": 0.4,
      "effortCredits": {
        "low": 1,
        "medium": 1,
        "high": 1,
        "xhigh": 1,
        "max": 1
      }
    },
    {
      "id": "gpt-6-sol",
      "provider": "openai",
      "label": "gpt-6-sol",
      "tier": "Plus",
      "description": "Better structure and instruction following.",
      "availableFor": [
        "email",
        "agent"
      ],
      "chatCredits": 2,
      "emailCredits": 0.8,
      "effortCredits": {
        "low": 2,
        "medium": 2,
        "high": 3,
        "xhigh": 4,
        "max": 5
      }
    },
    {
      "id": "claude-opus-5-5",
      "provider": "anthropic",
      "label": "claude-opus-5-5",
      "tier": "Pro",
      "description": "Anthropic flagship — best for demanding templates and multi-step reasoning.",
      "availableFor": [
        "email",
        "agent"
      ],
      "chatCredits": 4,
      "emailCredits": 1.3,
      "effortCredits": {
        "low": 4,
        "medium": 4,
        "high": 6,
        "xhigh": 8,
        "max": 10
      }
    }
  ]
}