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.
CodexoninPaste this into your coding agent (Claude Code, Cursor, Codex, and more) and it will set up and build with Opper for you.
Gemini 3.1 Pro Preview 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 |
|---|---|---|---|---|---|
| Gemini | US | Enterprise | No | $2.00 | $12.00 |
| Google Cloud | US | Enterprise | No | $2.00 | $12.00 |
Gemini 3.1 Pro Preview by Google, a frontier reasoning LLM with 1M context and strong agentic coding, scoring 77% on ARC-AGI-2 and 81% on SWE-Bench Verified.
Anthropic's terminal coding agent. Run it on any model on Opper, not just Claude.
opper launch claude
An open-source, model-agnostic coding agent for the terminal, wired to Opper's catalogue.
opper launch opencode
A lightweight open coding agent. Run it on any model through Opper.
opper launch pi