OpenAI's frontier GPT-5.6 model for complex professional work. 1M context window with reasoning.
Available on
Privacy
- Zero data retention
- Enterprise
- Training
- No
- Region
- US
Codex is OpenAI's open-source coding agent for the terminal. It works from natural-language instructions to edit code across your project, run commands, and complete tasks end to end, with its source available on GitHub under Apache-2.0. On Opper, launch it on GPT, Claude, Gemini, DeepSeek and 300+ more — one key, automatic fallbacks, and a choice of region.
Paste this into your coding agent (Claude Code, Cursor, Codex, and more) and it will set up and build with Opper for you.
GPT-5.6 Sol runs on the routes below. Route only to EU providers when your data has to stay in Europe.
| Provider | Region | Zero data retention | Training | Input | Output |
|---|---|---|---|---|---|
| OpenAI | US | Enterprise | No | $5.00 | $30.00 |
OpenAI's frontier GPT-5.6 model for complex professional work. 1M context window with reasoning.
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