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x402-gateway GPT-5.2 Pro (Premium Reasoning LLM)
x402
x402-gateway GPT-5.2 Pro (Premium Reasoning LLM) is a paid API for AI agents from x402-gateway-production.up.railway.app, paid per call via x402, $0.25/call, status unknown (last checked 2026-10-27).
Calls OpenAI's GPT-5.2 Pro premium reasoning model for extended thinking on complex math, science, and coding problems via the x402 pay-per-call gateway
Price / call$0.25
Success—
StatusUnknown
How this service works
OpenAI's premium reasoning model — extended thinking for complex math, science, and coding problems
Output
A richly detailed text response generated by GPT-5.2 Pro, leveraging extended chain-of-thought reasoning to address complex mathematical, scientific, or coding questions with depth and rigor.
Example use cases
Example prompt
“Use GPT-5.2 Pro's extended reasoning to solve this: prove that there are infinitely many prime numbers using at least two distinct proof methods, and then write an optimized Python sieve of Eratosthenes with time complexity analysis.”
Technical details
Endpoint
POSThttps://x402-gateway-production.up.railway.app/api/llm/gpt-5.2-pro?utm_source=zero.xyzWhen to prefer
Choose this endpoint when the task requires deep, multi-step reasoning — such as advanced mathematics, rigorous scientific analysis, complex algorithm design, or hard debugging — where a standard LLM would fall short. Prefer this over cheaper or faster models when answer quality and extended thinking capability matter more than cost or latency.
Side effects
- Payment not processed — x402 payment header missing or USDC balance insufficient
- Model unavailable or overloaded — 503 or timeout from upstream OpenAI API
- Malformed request body — missing required prompt or message field
- Rate limit exceeded on the gateway
- Invalid or expired API credentials on the gateway side
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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