Get available AI models

{
    "success": true,
    "models": [
        {
            "id": "openai/gpt-oss-120b",
            "name": "openai/gpt-oss-120b",
            "price_per_1M_tokens": 0.45,
            "currency": "USD"
        }
    ],
    "currency": "USD",
    "minimum_balance": 0.1,
    "parameters": {
        "max_tokens": {
            "description": "Maximum number of tokens to generate",
            "type": "integer",
            "default": null,
            "range": [
                1,
                32768
            ]
        },
        "temperature": {
            "description": "Controls randomness in output",
            "type": "float",
            "default": 1,
            "range": [
                0,
                2
            ]
        },
        "top_p": {
            "description": "Nucleus sampling parameter",
            "type": "float",
            "default": null,
            "range": [
                0,
                1
            ]
        },
        "top_k": {
            "description": "Limits token sampling to top K options",
            "type": "integer",
            "default": -1,
            "range": [
                -1,
                200
            ]
        },
        "presence_penalty": {
            "description": "Penalizes tokens based on presence in prompt",
            "type": "float",
            "default": 0,
            "range": [
                -2,
                2
            ]
        },
        "repetition_penalty": {
            "description": "Penalizes repeated tokens in output",
            "type": "float",
            "default": 1,
            "range": [
                -2,
                2
            ]
        }
    },
    "authentication_type": "api_key",
    "authenticated_user": "my_api_key"
}