OpenAI: GPT-5.1-Codex
OpenAI
openai/gpt-5.1-codexAbout this model
GPT-5.1-Codex is a specialized version of GPT-5.1 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks....
Make a request
OpenAI-compatible: set the base URL and your Promptix API key, keep your existing SDK.
curl https://promptix.tn/api/v1/chat/completions \ -H "Authorization: Bearer $PROMPTIX_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "model": "openai/gpt-5.1-codex", "messages": [ {"role": "user", "content": "Hello! What can you do?"} ] }'Pricing
In TND per 1M tokens. VAT and the platform fee are added at top-up.
Input tokens
4.153 TNDper 1M tokens
Output tokens
33.226 TNDper 1M tokens
1,000 requests with 1K input and 500 output tokens cost about 20.766 TND.
Specifications
- Provider
- OpenAI
- Context window
- 400,000 tokens
- Input modality
- Text
- Added
- Nov 13, 2025
- Supported parameters
include_reasoningmax_completion_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstool_choice