OpenAI: GPT-5.3-Codex
OpenAIModerated
openai/gpt-5.3-codexAbout this model
GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional knowledge capabilities of GPT-5.2. It achieves state-of-the-art results...
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-5.3-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
5.815 TNDper 1M tokens
Output tokens
46.516 TNDper 1M tokens
1,000 requests with 1K input and 500 output tokens cost about 29.073 TND.
Specifications
- Provider
- OpenAI
- Context window
- 400,000 tokens
- Input modality
- Text
- Added
- Feb 24, 2026
- Supported parameters
include_reasoningmax_completion_tokensmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputs