ZeroReader GPT-OSS 20B Chat Completion

x402

ZeroReader GPT-OSS 20B Chat Completion is a paid API for AI agents from api.zeroreader.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-02).

Runs chat completions using OpenAI's open-source 20B language model via a pay-per-call x402 API

Price / call$0.002

Seller volume →—

Success—

StatusUnknown

How this service works

GPT-OSS 20B (OpenAI) — OpenAI's open-source 20B model.

Output

Returns a chat.completion object containing the assistant's generated reply, a finish_reason (e.g. 'stop'), a unique completion ID, and message metadata — structured identically to the OpenAI chat completion response format.

Example use cases

Example prompt

“Use the GPT-OSS 20B model to answer this question — set temperature to 0.7 and limit the response to 512 tokens: 'What are the key differences between transformer and state-space models?'”

Technical details

Endpoint

POSThttps://api.zeroreader.com/v1/ai/gpt-oss-20b?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need a mid-size capable open-source model (20B parameters) that balances quality and cost at $0.002/call, and you want OpenAI's open-source architecture rather than Meta's Llama or Mistral. Prefer over GPT-OSS 120B when latency and cost matter more than peak capability, and over smaller models like Llama 3.2 3B when task complexity demands more capacity.

Side effects

Payment not provided or insufficient USDC balance — 402 Payment Required
messages array missing or empty — 400 Bad Request
temperature out of range (>2 or <0) — 422 Validation Error
max_tokens exceeds 4096 — 422 Validation Error
Model overload or upstream inference failure — 503 Service Unavailable
Malformed message role (not system/user/assistant) — 400 Bad Request

Input

Schema · Request body

Field	Type	Description
stream	boolean
messages	array
max_tokens	integer
temperature	number

Output

Schema · Response

{
  "id": "chatcmpl-example",
  "object": "chat.completion",
  "choices": [
    {
      "index": 0,
      "message": {
        "role": "assistant",
        "content": "I'm doing well!"
      },
      "finish_reason": "stop"
    }
  ]
}

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