Grok 4.1 Fast Reasoning by xAI adds extended thinking to a 2M context window for complex multi-step logic.
Available on
Pricing from$0.20/ 1M input$0.50/ 1M output2Mcontext
Privacy
- ZDR
- Training
- No
- Region
- Multi
Run Codex on Grok 4.1 Fast Reasoning
by OpenAICoding agent
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 700+ more — one key, automatic fallbacks, and a choice of region.
Run
Codexonin
CodexoninLaunch Codex on Grok 4.1 Fast Reasoning
Set up with agents
Paste this into your coding agent (Claude Code, Cursor, Codex, and more) and it will set up and build with Opper for you.
Where you can run it
Grok 4.1 Fast Reasoning 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 |
|---|---|---|---|---|---|
| Google Cloud | Multi | No | $0.20 | $0.50 |
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