{"uid":"cap_QZTGO3U7WYvKo6BXbA8dB","slug":"farout-pay-per-call-llm-inference-gpt-5-6-sol-via-x402-ae8eb011","name":"FarOut Pay-Per-Call LLM Inference (GPT-5.6-sol) via x402","description":"Fixed-price chat completions for gpt-5.6-sol on FarOut: flat $0.005 per call (includes up to 4,000 input + 1,000 output tokens). Rate: $0.380/1M input tokens, $2.280/1M output tokens. Pay with USDC on Base using x402. No API key, no account, no prepaid balance.","url":"https://farouter.tech/v1/models/gpt-5.6-sol/chat/completions","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"model":{"type":"string","description":"Model id from GET /v1/models, e.g. glm-5.3. No provider prefix."},"stream":{"type":"boolean","description":"SSE streaming."},"messages":{"type":"array","items":{"type":"object","required":["role","content"],"properties":{"role":{"enum":["system","developer","user","assistant","tool"],"type":"string"},"content":{}},"additionalProperties":true},"minItems":1,"description":"Chat messages, [OI]-compatible {role, content}."},"max_tokens":{"type":"integer","minimum":1,"description":"Output token budget. Sets your spending cap; actual usage is what gets settled (true-up)."},"temperature":{"type":"number","maximum":2,"minimum":0,"description":"Sampling temperature."},"max_completion_tokens":{"type":"integer","minimum":1,"description":"Alias of max_tokens (gpt-5.x models)."}}},"responseSchema":{"type":"json","example":{"usage":{"prompt_tokens":6,"completion_tokens":8},"choices":[{"message":{"role":"assistant","content":"Hello! How can I help?"},"finish_reason":"stop"}]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_kI-aVms7o07YJK-tIB3P6","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Send a chat/completion request to GPT-5.6-sol (or any of 17 frontier models) and pay per call in USDC on Base via x402 — no API key or account required.","exampleAgentPrompt":"Using FarOut's pay-per-call API with GPT-5.6-sol, write me a short Python function that parses a JSON file and extracts all email addresses — set max_tokens to 512 and temperature to 0.2.","exampleUseCases":[{"title":"Autonomous agent coding assistant","prompt":"I need you to call FarOut's GPT-5.6-sol model to write a Python script that fetches stock prices from a public API and plots them — keep it under 800 tokens output and use temperature 0.3."},{"title":"On-demand reasoning without account setup","prompt":"Use FarOut to send this logic puzzle to DeepSeek V4 and get a step-by-step solution — I don't have an API key so use the x402 pay-per-call route, max 1024 tokens."},{"title":"Multi-model comparison for chat response","prompt":"Send the same customer support question to both Gemini 3.1 and Kimi K3 on FarOut, with max_tokens 300 and temperature 0.7, so I can compare their answers side by side."}],"resultDescription":"Returns an OpenAI-compatible JSON object with a choices array (each entry has a message with role and content, plus finish_reason) and a usage object showing prompt_tokens and completion_tokens consumed.","failureModes":["Payment insufficient or x402 transaction rejected — request fails before inference begins","Model ID not found — returns error if model string doesn't match a supported model from GET /v1/models","max_tokens or max_completion_tokens exceeds model context limit — inference may be truncated or rejected","Malformed messages array (missing role or content) — schema validation error","Streaming (SSE) connection drops mid-response — partial output may be returned","Rate limiting or upstream model provider outage — temporary 5xx errors"],"whenToPreferThis":"Choose FarOut when your agent needs to call frontier LLMs without pre-registering an account, storing an API key, or maintaining a prepaid credit balance — ideal for autonomous agents that pay per request in USDC via x402. Prefer this over OpenAI direct when you want crypto-native per-call billing, access to multiple frontier models (GPT, Gemini, DeepSeek, Kimi, GLM, MiniMax) through one endpoint, or when operating in a trustless/permissionless environment where key management is undesirable.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:39:56.994Z","isFirstParty":false}