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Request entity too large error #6574
Description
Description
Recently hitting a 'request entity too large' response when using any model via Copilot. I haven't hit my usage limits (edu subscription) and the codebase is quite small. Sometimes happens when introducing screenshots, but even after removing these the issue persists. Often requires multiple session restarts or reworking from scratch.
OpenCode version
1.0.218
Steps to reproduce
No response
Screenshot and/or share link
Operating System
MacOS 26.2
Terminal
Ghostty
Activity
fredlahde commentedon Jan 2, 2026
+1 I am also facing this, since this evening.
It surfaced on a session with many screenshots, on a project without screenshots i did not hit this today, yet.
sin4ch commentedon Jan 5, 2026
Same thing just happened to me.
Didn't think it was a copilot thing. @Clock-Drift
tbrandenburg commentedon Jan 8, 2026
Same here with claude-sonnet-4.
It happens with a big Playwright Testing Suite and several screenshots.
sin4ch commentedon Jan 8, 2026
It has stopped for me. I think Copilot is having issues, or this is just their rate limiting.
Some models disappeared recently from my Copilot account, only to come back this morning. I'm not sure what's going on at Microsoft/GitHub.
chindris-mihai-alexandru commentedon Jan 10, 2026
It happens to me too on v1.1.12. Reproducible with multiple Copilot models after accumulating a few images in the conversation.
sin4ch commentedon Jan 10, 2026
seems these issues might soon be a thing of the past as copilot auth will be official per this post!
aalquwayfili commentedon Jan 15, 2026
I'm on
v1.1.21. Still having this issueUsing co-pilot and Claude 4.5 Opus
shihabshaharia commentedon Jan 22, 2026
Same issue on the latest version on an identical setup
open code Version 1.1.31 (1.1.31)
mattiamichini-design commentedon Jan 30, 2026
Same problem here with version v1.1.42 and Opus 4.5 via Github Copilot (auth)
GarauGarau commentedon Jan 30, 2026
Same problem with version v1.1.42 and GPT 5.2 on CLI.
WizoDev commentedon Feb 3, 2026
Same problem with version v1.1.48 and Opus 4.5 ( Github copilot )
wh01s17 commentedon Feb 3, 2026
Same problem with version v1.1.49 and Opus 4.5 (Github copilot) :c
PrinceD96 commentedon Feb 6, 2026
Only way I've been able to recover from this is with
/undoas long as your last prompt is what caused the issue. For example, this happened to me after adding/tagging an image.erf commentedon Feb 16, 2026
Happened to me now (version 1.2.5) when trying to read large image files.
nazgulcan commentedon Feb 19, 2026
persists on any model on Copilot on OpenCode
ZauJulio commentedon Feb 19, 2026
Same thing here
raymelon commentedon Feb 23, 2026
Experienced the same issue after a Copilot model attempted to read a screenshot.
Switching models saves the session. However, switching back to the Copilot model will just yield the same error.
Forking the session then compacting the fork didn't work either.
OpenCode 1.2.6 on any Copilot model
kyriakossdr commentedon Feb 25, 2026
I managed to resolve this by compressing the images. After reducing them from ~2MB to ~0.5MB, it was able to read both images.
OpenCode 1.2.10 on Claude Sonnet 4.5 Copilot.
fujunchao commentedon Feb 27, 2026
I also encountered this issue. When using GitHub Copilot Opus 4.6 and testing web pages with the MCP tool Chrome DevTools, this problem occurs after taking several screenshots.The version of OpenCode is 1.2.15.
unk1911 commentedon Mar 2, 2026
same problem here, github copilot opus 4.6 with opencode 1.2.15. seems like there's no way to back out of this..
raymelon commentedon Mar 4, 2026
@kyriakossdr This is smart. As long as the reference (image path) is the same, there should be no issue? I will try.
kargnas commentedon Mar 28, 2026
This can fix those issues:
opencode.json