Vercel Chat Completion Structure

{
  "title": "Vercel AI Gateway Chat Completion Structure",
  "description": "Structural documentation for a Vercel AI Gateway chat completion request",
  "type": "object",
  "fields": [
    { "name": "model", "type": "string", "description": "provider/model-name e.g. anthropic/claude-opus-4.6" },
    {
      "name": "messages",
      "type": "array",
      "description": "Conversation messages",
      "items": {
        "type": "object",
        "fields": [
          { "name": "role", "type": "string", "description": "system, user, assistant, or tool" },
          { "name": "content", "type": "string|array", "description": "Text or multi-modal content array" }
        ]
      }
    },
    { "name": "stream", "type": "boolean", "description": "Enable SSE streaming" },
    { "name": "temperature", "type": "number", "description": "Sampling temperature 0-2" },
    { "name": "max_tokens", "type": "integer", "description": "Maximum tokens to generate" },
    {
      "name": "providerOptions",
      "type": "object",
      "description": "Provider routing configuration",
      "fields": [
        {
          "name": "gateway",
          "type": "object",
          "fields": [
            { "name": "order", "type": "array", "description": "Provider fallback chain" },
            { "name": "sort", "type": "string", "description": "cost, ttft, or tps" }
          ]
        }
      ]
    },
    {
      "name": "provider",
      "type": "object",
      "description": "Provider shorthand",
      "fields": [
        { "name": "sort", "type": "string", "description": "cost, ttft, or tps" }
      ]
    }
  ]
}