# GPT-5.6 Luna Chat Completions (api.monpham.work)

> GPT-5.6 Luna Chat Completions (api.monpham.work) is a paid API for AI agents from api.monpham.work, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-27).

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.

## Facts

- Endpoint: GET https://api.monpham.work/v1/luna/chat/completions?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-27
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gpt-5-6-luna-chat-completions-api-monpham-work-cddf2cb5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_v7wzBLgkx66fNtm0c0V9y

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability gpt-5-6-luna-chat-completions-api-monpham-work-cddf2cb5
```

Example prompt: 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.'

## When to prefer this

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.

## Known failure modes

- 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

## How this service works

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.

## Output

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.

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gpt-5-6-luna-chat-completions-api-monpham-work-cddf2cb5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.monpham.work](https://www.zero.xyz/host/api.monpham.work/llms.txt)