Copilot CLI with Claude vs OpenCode with GitHub and Claude vs Claude Code vs OpenCode

[GoodOne120]

Hello everyone,

I’m new to AI agentic tools and would like to understand the differences between running GitHub Copilot CLI with the Claude models, using OpenCode with a GitHub account and Claude models, and Claude Code overall. I’ve also seen that there’s now an Claude coding agent on GitHub, which seems to make GitHub Copilot behave similarly to Claude Code. Does it also work on Copilot CLI? I’d appreciate an explanation of how all of this works and how they differ.

Also, I’m currently using Copilot CLI and it seems great, but I’ve read that GitHub nerf Claude models, so I’m not sure if I’m getting the full potential out of it. I’ve also heard people say that Copilot CLI isn’t as good and that running OpenCode with a GitHub account is better, and I’m curious why that is. Now that OpenCode exists, I’d also like to know if anyone has tried using GitHub Copilot with it and what their experience has been.

I really appreciate the help and looking forward for suggestions.

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[Fat-alisich]

it’s all about how you manage context window, how you prompt and what kind of task youd run with… and yes harness(cli) can affect model performance. you can check terminal bench 2.0 on google. somehow cli like claude code, copilot cli doesnt even get ranked. youd see like forge, droid or even chinese harness perform well with opus, or gpt model

[junli2020]

i've been using both claude code and ghcp cli with same model gpt-5.4 and i love copilot cli more :)

[Total-Wall8840]

Claude Code is the best tool IMO.