{"uid":"cap_CuUz7lSdTS-hxcR9zp6O4","slug":"x402-gateway-production-up-railway-app-30470af4","name":"x402-gateway GPT-5.2 Pro (Premium Reasoning LLM)","description":"OpenAI's premium reasoning model — extended thinking for complex math, science, and coding problems","url":"https://x402-gateway-production.up.railway.app/api/llm/gpt-5.2-pro","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.25","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.25/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.25","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.25","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_NkaEBI4ZD6ustHfPazlpZ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.25","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"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","exampleAgentPrompt":"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.","exampleUseCases":null,"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:50:27.883Z","isFirstParty":false}