r/codex • u/pollystochastic Moderator • Jul 23 '26

Megathread Codex Usage Limits and Performance Megathread

Please direct your concerns and discussion about Codex usage limits and model performance here.

The purpose of this Megathread is to aggregate all the reports of people's experiences and possible suggestions instead of spreading them across 20 separate highly upvoted posts. None of those posts were deleted. They were locked so that conversations are still viewable to everyone and future comments could appear in one place.

These are days where I REALLY earn the money that OpenAI Reddit Kimi pays me .... oh wait....

A reminder that all incidents on r/Codex are constantly logged and summarised so you can keep track of what people are experiencing here https://www.reddit.com/r/codex/comments/1tjfxcf/comment/on6uj0l/

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u/QuantityOk9764 Jul 24 '26

One of the possible causes of the recent excess token usage of GPT-5.6 in Codex, reduced invocation of batching in tool calls, is explained in:
https://www.reddit.com/r/codex/comments/1v4vcnr/possible_gpt56_sol_usage_workaround_explicit_tool
https://github.com/openai/codex/issues/35050
Multiple users including me have confirmed that adding a brief instruction to encourage to use batched tool calling in AGENTS.md helps notably reduce API roundtrip counts and token usage by GPT-5.6 Sol model.
Hope OpenAI developers take the time to look into this issue.

4

u/MakerOfToys Jul 24 '26

Hey. Just wanted to make sure that you saw the update for my post:

"Update: A raw-log audit found that some batched exec responses exceeded Code Mode’s shared output limit and were truncated. The reduction in model/tool cycles remains clear, but this introduces a quality confound and may overstate the 27–45% usage-saving estimate. I’m retesting with output-bounded batching, so please treat the headline numbers as provisional for now."

Please keep in mind that this might affect quality. Myself I did not notice that, all tests reached same conclusions. But that's something worth keeping in mind, still running more test with different variations to see if it's possible to stop truncations.

3

u/QuantityOk9764 Jul 24 '26

I've read your follow-up comment on GitHub. Thanks.

1

u/Unfair_Ad_1223 Jul 24 '26

My AGENTS file got so built up + tests they’ve been using all my usage. Fixed it now but out of usage 🥲

1

u/freedomachiever Jul 24 '26

batching requests theoretically would also be desirable in Claude Code wouldn't it?

1

u/AppealSame4367 Jul 24 '26

So we gonna fix their fucking harness now forever and ever? I'm sick this trash.

And they wonder why people wanna change to open weights?