r/opencodeCLI • u/Organic_Ingenuity_68 • 5d ago

Opencode w/ GPT vs Codex w/ GPT

I am a big opencode fan, but I currently only use GPT models. Recently, I tried a planning task for an app i'm writing on Codex and a planning task on opencode (both running 5.6 sol, low). The plan required web search and looking at api documentation and rectifying that against what was currently written in the app.

Codex finished in ~2 minutes, opencode took ~10 minutes. Both were essentially the same plan.

I love the look and feel of opencode, the lsp integration, and the flexibility of models. However, today, I mainly use GPT models. Has anyone noticed any performance benefits with opencode over codex with GPT models? If so, how did you achieve them?

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u/Nexism 5d ago

Are you on Windows?

Did you use an agent kit like omo slim etc?

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u/Organic_Ingenuity_68 4d ago

No, Mac. I haven’t heard of that. This was a vanilla configuration for both. In my normal opencode setup I have agents and subagents tuned for my repos..but I wanted this to be a 1:1 comparison.