{"uid":"cap_v7wzBLgkx66fNtm0c0V9y","slug":"gpt-5-6-luna-chat-completions-api-monpham-work-cddf2cb5","name":"GPT-5.6 Luna Chat Completions (api.monpham.work)","description":"GPT-5.6 Luna — fast, low-cost frontier model (Artificial Analysis Intelligence Index 51.2, GPQA Diamond 91.1%). Best for high-volume chat, classification, extraction, and lightweight agentic loops where latency and cost matter. Limits: 8K input / 2K output tokens per call. OpenAI-compatible request and response format.","url":"https://api.monpham.work/v1/luna/chat/completions?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_EaUILezPTxY02yeb9rkb_","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calls a fast, low-cost frontier language model (GPT-5.6 Luna) for chat completions, classification, extraction, and lightweight agentic tasks via an OpenAI-compatible API.","exampleAgentPrompt":"Use the Luna model to classify this customer support ticket as billing, technical, or general inquiry, and summarize the key issue in one sentence: 'My account was charged twice last month but I only made one purchase.'","exampleUseCases":[{"title":"High-volume customer review classification","prompt":"Classify the sentiment of these 500 product reviews as positive, negative, or neutral using a fast, cheap model — I need results quickly and at low cost."},{"title":"Structured data extraction from unstructured text","prompt":"Extract the company name, job title, and contact email from this block of text: 'Hi, I'm Sarah Chen, Head of Partnerships at Luminary Labs. Reach me at sarah@luminarylabs.io.'"},{"title":"Lightweight agentic loop reasoning step","prompt":"I'm building an agent that needs to decide at each step whether to search the web, call a tool, or respond directly to the user — use a fast, low-cost model to make that routing decision given this context."}],"resultDescription":"An OpenAI-compatible chat completion response object containing the assistant's generated message, finish reason, and token usage counts. Output is capped at 2,048 tokens per call.","failureModes":["Input exceeds 8,192 token limit — request rejected","Output truncated at 2,048 tokens for long generations","Rate limiting or quota exhaustion under high concurrency","Payment failure via x402 protocol blocks the request","Malformed request body returns 400-style error","Model may hallucinate facts in extraction tasks without grounding"],"whenToPreferThis":"Choose Luna when you need a fast, low-cost frontier-class model for high-volume workloads such as classification, extraction, summarization, or lightweight agentic reasoning steps where latency and per-call cost matter more than maximum intelligence. Its OpenAI-compatible format makes it a drop-in replacement. Prefer the sibling Terra model when accuracy on harder tasks (e.g. GPQA-level reasoning) is the priority and higher cost is acceptable.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-27T18:39:17.755Z","isFirstParty":false,"canonicalSlug":"gpt-5-6-luna-chat-completions-api-monpham-work-cddf2cb5"}