# OpenAI o1 Chat Completions (x402 USDC)

> OpenAI o1 Chat Completions (x402 USDC) is a paid API for AI agents from openai.mm.family, paid per call via x402, $0.003658/call, status unknown (last checked 2026-10-02).

Runs OpenAI o1 reasoning model chat completions with per-call USDC micropayment billing via x402 protocol

## Facts

- Endpoint: POST https://openai.mm.family/x402/v1/models/o1/chat/completions?utm_source=zero.xyz
- Price: $0.003658/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/openai-o1-chat-completions-x402-usdc-8ef04ee6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_T2t49tzGVZZ1X7MV1oLGm

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability openai-o1-chat-completions-x402-usdc-8ef04ee6 -d '<json body>'
```

Example prompt: Use the o1 model at high reasoning level to solve this multi-step logic puzzle: 'A farmer has 3 fields, each yielding different crops — work out the optimal rotation to maximize yield over 4 seasons' — allow up to 2000 tokens for the answer.

## When to prefer this

Choose this endpoint when you specifically need OpenAI's o1 reasoning model — known for chain-of-thought reasoning on hard math, coding, and logic tasks — and want per-call USDC micropayment billing without a subscription. Prefer over other models on this gateway when the task requires deep deliberative reasoning (use o1:high or o1:xhigh) or when cost control matters (o1:low). Prefer over OpenAI's native API when paying per-call in USDC via x402 is required for an autonomous agent workflow.

## Known failure modes

- Insufficient USDC balance causes payment failure before inference runs
- max_tokens too low for o1 reasoning traces, resulting in truncated or empty response (not billed if empty)
- Invalid model enum value returns 400 bad request
- Streaming not supported by all service tiers, may return error
- Rate limits or service tier unavailability may return 429 or 503
- Reasoning effort string unrecognized may be silently ignored or error

## How this service works

o1: OpenAI o1 chat completions, paid per call in USDC. Per 1M tokens in/out: Standard (default) 15.0/60.0; pick with service_tier. Plus $0.0005 (Base) or $0.0005 (Solana) per call; the quote charges input plus 10% of max_tokens. Levels: low, medium, high, xhigh (model o1:<level>). Empty answers are free. Rates: https://openai.mm.family/x402/pricing

## Output

Returns a JSON chat completion object containing the assistant's generated message content, token usage breakdown (prompt, completion, total), finish reason, model name, service tier, and a unique completion ID. Empty/refused responses are not billed.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "model": {
   "enum": [
    "o1",
    "o1:low",
    "o1:medium",
    "o1:high",
    "o1:xhigh"
   ],
   "type": "string"
  },
  "tools": {
   "type": "array"
  },
  "stream": {
   "type": "boolean"
  },
  "messages": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "role",
     "content"
    ],
    "properties": {
     "role": {
      "type": "string"
     },
     "content": {
      "type": "string"
     }
    }
   }
  },
  "max_tokens": {
   "type": "integer"
  },
  "service_tier": {
   "enum": [
    "flex",
    "default",
    "standard",
    "auto",
    "fast",
    "priority"
   ],
   "type": "string"
  },
  "response_format": {
   "type": "object"
  },
  "reasoning_effort": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "id": "chatcmpl-x",
  "model": "o1",
  "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": "default"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/openai-o1-chat-completions-x402-usdc-8ef04ee6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from openai.mm.family](https://www.zero.xyz/host/openai.mm.family/llms.txt)