# x402.monpham.work GPT-5.6 Sol Chat Completions

> x402.monpham.work GPT-5.6 Sol Chat Completions is a paid API for AI agents from x402.monpham.work, paid per call via x402, $0.06/call, status unknown (last checked 2026-10-27).

Runs chat completions via a self-described 'GPT-5.6 Sol' frontier LLM optimized for hard reasoning, complex multi-file code, and long-context analysis, with OpenAI-compatible request/response format.

## Facts

- Endpoint: GET https://x402.monpham.work/v1/sol/chat/completions?utm_source=zero.xyz
- Price: $0.06/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-27
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-monpham-work-gpt-5-6-sol-chat-completions-0e745e33
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_J0VpVccFE1uQr2w7B3Z_A

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 x402-monpham-work-gpt-5-6-sol-chat-completions-0e745e33
```

Example prompt: I need you to use the Sol flagship model — the most powerful tier — to work through this hard reasoning problem: given three interdependent Python microservices with shared state, identify all potential race conditions and suggest fixes with corrected code. Use up to 3000 output tokens and a temperature of 0.3 for precision.

## When to prefer this

Choose this endpoint when accuracy and reasoning depth are more important than cost or latency — e.g. hard logic puzzles, complex multi-file code analysis, long-context document work, or tasks where a wrong answer is costly. Prefer GPT-5.6 Luna for fast, cheap completions and GPT-5.6 Terra for a balanced middle ground. Use Sol when you need the highest-capability tier in this family and can absorb the $0.06/call cost.

## Known failure modes

- Context length exceeded: combined input messages exceed 24,000 tokens, returning a 400 error
- max_tokens capped at 4000: requests above this limit are silently or explicitly capped
- Payment failure: x402 payment of $0.06 USDC not fulfilled, resulting in a 402 response
- Model ID mismatch: unsupported model string returns an error
- Rate limiting or overload: 429 or 503 responses under high traffic
- Invalid message format: missing required 'role' or 'content' fields causes a 400
- Streaming failure: SSE stream interrupted mid-response

## How this service works

GPT-5.6 Sol — flagship frontier model, the most capable tier in the GPT-5.6 family. Best for hard reasoning, complex multi-file code work, long-context analysis, and tasks where accuracy outweighs cost. Limits: 24K input / 4K output tokens per call. OpenAI-compatible request and response format.

## Output

Returns an OpenAI-compatible chat completion object containing the assistant's generated message, model metadata, token usage counts (prompt tokens, completion tokens, total tokens), finish reason, and an ID. The response follows the standard OpenAI ChatCompletion response schema.

## 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/x402-monpham-work-gpt-5-6-sol-chat-completions-0e745e33/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.monpham.work](https://www.zero.xyz/host/x402.monpham.work/llms.txt)