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GPT-5.1 Codex · impossibl

GPT-5.1 Codex is a specialised version of OpenAI's GPT-5.1 optimised for software engineering and coding workflows. It is designed for interactive development sessions as well as long, independent runs on complex engineering tasks, and is the base for the smaller GPT-5.1 Codex mini.

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Eingabe, $/1M $1.25

Ausgabe, $/1M $10.00

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Kontext 400 000

Akzeptiert Bilder, Text

Zuletzt geprüft 04.11.2026 12:00:14 UTC

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API

OpenAI-kompatible API: Die offiziellen OpenAI-SDKs funktionieren mit dieser Basis-URL. Ersetzen Sie YOUR_API_KEY durch Ihren Schlüssel vom Anbieter.

API-Basis-URL
https://api.impossibl.com/v1
Endpunkt
https://api.impossibl.com/v1/chat/completions
Modell-ID
openai/gpt-5.1-codex
curl
curl https://api.impossibl.com/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "openai/gpt-5.1-codex", "messages": [{"role": "user", "content": "Hello!"}], "max_tokens": 256}'
Python
import requests

r = requests.post(
    "https://api.impossibl.com/v1/chat/completions",
    headers={"Authorization": "Bearer YOUR_API_KEY"},
    json={
      "model": "openai/gpt-5.1-codex",
      "messages": [
        {
          "role": "user",
          "content": "Hello!"
        }
      ],
      "max_tokens": 256
    },
)
print(r.json())
JavaScript
const r = await fetch("https://api.impossibl.com/v1/chat/completions", {
  method: "POST",
  headers: {Authorization: "Bearer YOUR_API_KEY", "Content-Type": "application/json"},
  body: JSON.stringify({
    "model": "openai/gpt-5.1-codex",
    "messages": [
      {
        "role": "user",
        "content": "Hello!"
      }
    ],
    "max_tokens": 256
  }),
});
console.log(await r.json());
Anfrage (JSON)
{
  "model": "openai/gpt-5.1-codex",
  "messages": [
    {
      "role": "user",
      "content": "Hello!"
    }
  ],
  "max_tokens": 256
}
Antwort (JSON)
{
  "id": "chatcmpl-...",
  "object": "chat.completion",
  "model": "openai/gpt-5.1-codex",
  "choices": [
    {
      "index": 0,
      "message": {
        "role": "assistant",
        "content": "Hi! How can I help?"
      },
      "finish_reason": "stop"
    }
  ],
  "usage": {
    "prompt_tokens": 9,
    "completion_tokens": 12,
    "total_tokens": 21
  }
}

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API-Dokumentation des Anbieters

Source: AI Rate Card, https://airatecard.com/de/c/offer%3Aimpossibl%7Copenai/gpt-5.1-codex, prices checked 2026-11-04; seller's page: https://impossibl.com/models/openai/gpt-5.1-codex

Technische Details

ID: offer:impossibl|openai/gpt-5.1-codex