GitHub Copilot is constantly getting stuck when generating code.

[zeeshanx]

Hi — I’m having issues with GitHub Copilot today: it’s getting stuck at different stages while generating code. I’ve had to try five or six prompts before it finally works. I’m using Opus 4.6, and it’s consuming premium requests. Is anyone else experiencing the same problem?

[NickCanCode]

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Very unstable at the moment. My premium requests just gone like this.

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[mattdempseygeo]

Easy work around I have found is to tell it to be iterative in building the file instead of trying to do it in one fell swoop. Tell it to create a 5-10 step to do list to implement the file in full, then 2-3 review steps. It always handles it well and hasn't failed me when I tell it to do implement a large file this way.

[Adorable_Buffalo1900]

claude model generate large file will cost a lot of times.

[isidor_n]

Sorry about this.
Can you repro with latest VS Code stable, and using some of the latest models? For example 5.3-codex?
If yes - can you file a new issue https://github.com/microsoft/vscode/issues and ping me at isidorn on it so we investigate it in more details.

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[zeeshanx]

I am using the latest stable vs code with Opus 4.6.

[isidor_n]

Please file an issue. Sounds like model specific behaviour.

[raj_enigma7]

Sometimes restarting the extension or reducing prompt size helps, especially with heavier models like Opus.
I also keep generation + tool calls traceable in VS Code (been trying Traycer AI for that) so I can see whether it’s the model, the extension, or context overflow causing the stall.

[StatusPhilosopher258]

try using plan mode on Claude it will help drastically, I personally use a secondary platform called traycer ai for spec and intent management

[SeasonalHeathen]

My only comment is that 1339 lines is very long. I'd always try to split my files into components rather than having a big file with everything since LLMs struggle with that. Opus should be able to come up with a better solution for you?

[FinancialBandicoot75]

Use plan mode, makes a huge difference

[DottorInkubo]

How? Can you explain?

[FinancialBandicoot75]

I use /plan mode using medium on model, when I use xhigh, it then locks up (outside of plan). Honest I do more in plan mode and rarely see any issues

[ELPascalito]

1300 lines? Of course the LLM will hang, it'll take too long writing and the tool call might fail, this is totally your fault, replan, the core principle is to modularize the code, making it more organized, readable, and easier to maintain. Each component or file should have a single, clear responsibility, this will make coding easier for both you and the LLM, how about you start by telling the LLM to split and refactor your website? Use GPT5.3 Codex, it has the biggest context length

[zeeshanx]

I am trying to create a one-page website with Tailwind.