Grok 4.20 0309 Reasoning by xAI pairs a multi-agent architecture with visible chain-of-thought for higher accuracy.
Available on
Pricing from$1.25/ 1M input$2.50/ 1M output$0.20/ 1M cache read1Mcontext
Privacy
- ZDR
- Training
- No
- Region
- US
Run Codex on Grok 4.20 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 4.20 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 4.20 Reasoning runs on the routes below. Route only to EU providers when your data has to stay in Europe. Some routes also sell priority processing: the same model at another price, picked per request with service_tier. How service tiers work.
The model
Run Codex on other models
Step-by-step setup for running Codex on each of these models through Opper.
GPT-6 SolGPT-6 LunaClaude Opus 5.5Grok 4.7MiMo V2.6 ProLing-3.0-flash-FinDeepSeek V4.1 FlashLing-3.0-flash-VLGPT-6 AstraQwen3.8-MaxGemini 3.8 FlashMuse Spark 1.3 ContributorClaude Fable 5.1GLM-5.3-FlashQwen3.8 Flash-NextGLM-5.3Qwen3.8 27BDeepSeek V4 ProGemini 3.7 FlashGrok 4.6Qwen3.8-2.4T-A95BInkling-SmallClaude Opus 5Gemini 3.6 FlashKimi K3GPT-5.6 SolGPT-5.6 TerraGPT-5.6 LunaGrok 4.5Claude Sonnet 5GLM-5.2Kimi K2.7 CodeClaude Fable 5MiniMax M3Claude Opus 4.8Qwen3.7-MaxKimi K2.6Claude Opus 4.7GLM 5.1Gemini 3.1 Pro PreviewClaude Sonnet 4.6GLM 4.7GPT-5Grok 4.20 ReasoningDeepSeek V4 Flash VisionHy4 PreviewQwen3.8 FlashMiniMax H3MiMo V2.6 FlashSCX-coderMAGPiEGreen LGreen RSee all 700+ models
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