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OpenAI GPT 5.6 Sol Chat Completions (via mm.family x402)
x402
OpenAI GPT 5.6 Sol Chat Completions (via mm.family x402) is a paid API for AI agents from openai.mm.family, paid per call via x402, $0.001024/call, status unknown (last checked 2026-10-03).
Runs GPT-5.6-Sol chat completions (up to 272K input tokens) billed per-call in USDC via the x402 payment protocol, with Flex/Standard/Fast service tiers and configurable reasoning levels.
Price / call$0.001024
Success—
StatusUnknown
How this service works
gpt-5.6-sol: OpenAI GPT 5.6 Sol (<=272K input tokens) chat completions, paid per call in USDC. Per 1M tokens in/out: Flex (default) 2.0/10.0, Standard 4.0/20.0, Fast 8.0/40.0; pick with service_tier. Plus $0.0005 (Base) or $0.0005 (Solana) per call; the quote charges input plus 10% of max_tokens. Levels: none, low, medium, high, xhigh (model gpt-5.6-sol:<level>). Empty answers are free. Rates: https://openai.mm.family/x402/pricing
Output
A JSON chat completion object containing the assistant's reply text, finish reason (e.g. 'stop'), prompt and completion token counts, model name, service tier used, and a completion ID — matching the OpenAI chat completions response format.
Example use cases
Long-document summarization with large context
“I have a 200,000-token legal contract I need summarized into key obligations and risks — send it to GPT-5.6-Sol on the Flex tier with a max of 2000 output tokens.”
Structured JSON extraction from unstructured text
“Use GPT-5.6-Sol to pull out all dates, parties, and monetary amounts from this document and return them as JSON — Standard tier, up to 512 tokens output.”
Multi-turn coding assistant with high reasoning
“Chat with GPT-5.6-Sol at the 'high' reasoning level: I need help debugging this Python async function — here's the conversation so far, continue it with up to 800 tokens on the Fast tier.”
Technical details
Endpoint
POSThttps://openai.mm.family/x402/v1/models/gpt-5.6-sol/chat/completions?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need OpenAI's GPT-5.6-Sol model specifically, require up to 272K input tokens, want to pay per-call in USDC via x402 (no subscription), and need control over service tier (Flex for lowest cost, Fast for lowest latency) or reasoning intensity level. Prefer over generic OpenAI API when crypto-native micropayment billing is required or when the caller lacks an OpenAI API key but holds USDC.
Side effects
- Insufficient USDC balance for the x402 payment — returns 402 Payment Required
- Input tokens exceed 272K context limit — returns 400 with token count error
- Invalid model variant string — returns 400 validation error
- Unsupported service_tier value — returns 400 enum error
- Rate limiting or upstream OpenAI unavailability — returns 429 or 503
- max_tokens too large for chosen tier — may return 400 or truncated response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| model | string | |
| tools | array | |
| stream | boolean | |
| messages | array | |
| max_tokens | integer | |
| service_tier | string | |
| response_format | object | |
| reasoning_effort | string |
Output
Schema · Response
{
"type": "json",
"example": {
"id": "chatcmpl-x",
"model": "gpt-5.6-sol",
"usage": {
"total_tokens": 9,
"prompt_tokens": 8,
"completion_tokens": 1
},
"object": "chat.completion",
"choices": [
{
"index": 0,
"message": {
"role": "assistant",
"content": "Hello",
"refusal": null
},
"finish_reason": "stop"
}
],
"service_tier": "flex"
}
}Tags
x402
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