{"uid":"cap_T_QL44dTV-3Y9AahLH6hP","slug":"x402-monpham-work-gpt-5-6-terra-chat-completions-8ef35b04","name":"x402.monpham.work GPT-5.6 Terra Chat Completions","description":"GPT-5.6 Terra — balanced frontier model (Intelligence Index 55.0, GPQA Diamond 92.5%, Terminal-Bench Hard 57.6%). Best for everyday coding, multi-step reasoning, and agentic tasks needing more capability than Luna without Sol's cost. Limits: 16K input / 4K output tokens per call. OpenAI-compatible request and response format.","url":"https://x402.monpham.work/v1/terra/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":"0.025","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":"$0.025/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.025","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.025","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_5AlQnM6YZx-TUqcCEevuv","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.025","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Runs chat completions via the GPT-5.6 Terra balanced frontier model (Intelligence Index 55.0), supporting multi-step reasoning, coding, and agentic tasks at mid-tier cost and capability.","exampleAgentPrompt":"Use the GPT-5.6 Terra model to answer this multi-step reasoning question with up to 2000 tokens: 'A factory produces widgets at 120 per hour but breaks down randomly — if downtime follows a Poisson distribution averaging 2 breaks per 8-hour shift each lasting 30 minutes, what is the expected daily output?'","exampleUseCases":[{"title":"Multi-step coding assistant","prompt":"I need you to use the Terra model to write a Python function that parses a nested JSON structure, flattens it into a list of key-value pairs, and handles missing keys gracefully — generate up to 1500 tokens and keep temperature at 0.2 for precision."},{"title":"Agentic task planning","prompt":"Use the GPT-5.6 Terra model to break down this project into a detailed step-by-step execution plan: 'Launch a SaaS product in 90 days with a two-person team and a $10K budget.' Give me up to 3000 tokens in the response."},{"title":"Complex reasoning Q&A","prompt":"Ask the Terra AI model to solve this logic puzzle and explain its reasoning step by step: 'Five people each own one of five houses in a row, each painted a different color, each keeping a different pet...' — use temperature 0.5 and up to 2000 tokens."}],"resultDescription":"Returns an OpenAI-compatible chat completion object containing the assistant's generated message, finish reason, and token usage counts (prompt tokens, completion tokens, total tokens). Optionally streams tokens via SSE if stream is set to true.","failureModes":["Input messages exceed 16,000 token limit — request rejected with token limit error","max_tokens set above 4000 — capped or rejected","Malformed messages array (missing role or content fields) — validation error","Payment of $0.025 USDC not completed via x402 protocol — 402 Payment Required response","Model ID does not match gpt-5.6-terra — may fall back to default or return error","Temperature outside 0-2 range — validation error or unexpected outputs"],"whenToPreferThis":"Choose Terra over Luna when you need stronger multi-step reasoning, harder coding tasks, or higher benchmark performance (GPQA Diamond 92.5%) and Luna's capability is insufficient. Choose Terra over Sol when cost efficiency matters and you do not need Sol's maximum capability tier. Ideal for agentic pipelines that require mid-tier intelligence at $0.025 per call with a 16K input context window and OpenAI-compatible format.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-30T00:33:30.446Z","isFirstParty":false,"canonicalSlug":"x402-monpham-work-gpt-5-6-terra-chat-completions-8ef35b04"}