OpenAI GPT-5.2 Chat Completions (x402)

x402

OpenAI GPT-5.2 Chat Completions (x402) is a paid API for AI agents from openai.mm.family, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).

Provides OpenAI GPT-5.2 chat completions via pay-per-call USDC billing with configurable service tiers (Flex, Standard, Fast) and reasoning levels.

Price / call$0.001

Seller volume →—

Success—

StatusUnknown

How this service works

gpt-5.2: OpenAI GPT 5.2 chat completions, paid per call in USDC. Per 1M tokens in/out: Flex (default) 0.875/7.0, Standard 1.75/14.0, Fast 3.5/28.0; 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-5.2:<level>). Empty answers are free. Rates: https://openai.mm.family/x402/pricing

Output

Returns a JSON chat completion object with an assistant message, finish reason, token usage breakdown (prompt, completion, total), model name, and service tier used. Empty responses are free of charge. The response mirrors the OpenAI chat completions response format.

Example use cases

Reasoned technical Q&A with GPT-5.2

“Ask GPT-5.2 using the standard tier and high reasoning level to explain the trade-offs between microservices and monolithic architectures, and limit the response to 800 tokens.”

Cost-optimized batch summarization

“Use GPT-5.2 on the flex tier to summarize this article in 3 bullet points, keeping it under 200 tokens to minimize cost: 'The Federal Reserve announced a 0.25% rate cut today...'”

Agentic tool-calling workflow

“Have GPT-5.2 on the fast tier process this conversation and call the appropriate tool when the user asks about current weather — here's the messages array and tool definitions I need you to pass through.”

Technical details

Endpoint

POSThttps://openai.mm.family/x402/v1/models/gpt-5.2/chat/completions?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need GPT-5.2 specifically (as opposed to GPT-4.1 or o3) and want per-call USDC micropayment billing without a subscription. Particularly useful for agents that pay only when invoked, need flexible tier selection (flex for cost, fast for latency), or operate on crypto-native payment rails via x402. Prefer over competitors when you want the latest OpenAI model with transparent per-token pricing and no monthly commitment.

Side effects

Insufficient USDC balance — payment fails and request is rejected
max_tokens quota exceeded or invalid — 400 error
Invalid model variant specified — 400 validation error
Service tier unavailable or invalid enum value — 400 error
Rate limiting at the gateway level — 429 response
Network timeout on fast/standard tier — timeout error
Streaming not supported in all client configurations

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-5.2",
    "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"
  }
}

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