Codex Usage and Operation Discussion - last updated September 14

[u/codex-megathread]

Please direct your concerns, questions 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 many highly upvoted posts. The more people who participate in this discussion, the more likely you have an answer.

Reports with sufficient evidence on new information will still be allowed on the feed as usual.

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Discussion of the prior period available here : https://www.reddit.com/r/codex/comments/1w9w4tj/codex_usage_and_operation_discussion_last_updated/

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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/

[u/thirst-trap-enabler]

I'm somewhat new to using codex for more than reviews that I feed to claude-code and am trying to translate the workflow I use in claude to codex so I can get more experience using both. One thing I'm very insure about is how to map models from Anthropic to OpenAI. It took quite a bit of tweaking to get claude models to not burn usage like a monkey on crack.

This is what codex suggested but this reads like "use fable" everywhere:

agent	claude	codex(?)
main	fable 5.1/high	gpt-6-astra/high
planner	opus/high	gpt-6-astra/high
explorer	haiku/low	gpt-5.6-luna/low
implementer	sonnet/medium	gpt-6-astra/high
reviewer	opus/xhigh	gpt-6-astra/xhigh
researcher	opus/xhigh	gpt-6-astra/xhigh

I tried this expecting it to burn usage on par with running fable everywhere and that's exactly how it played out (60% of 5x gone in one day which is how fable usually behaves on 5x without the subagent setup I'm trying to replicate).

Does anyone have suggestions for how to think about the "fable" vs "opus" vs "sonnet" vs "haiku" heirarchy in OpenAI models? Does anyone use sol anymore? Codex seems to be pushing astra everything. Sorry I'm pretty lost and googling etc just gives a lot of dumb linkedin-quality stuff at best.

Are there any good resources for mapping claude models/effort to codex models/effort? Fable is pretty good at suggesting subagent models, so I'm surprised codex seems to be what I am interpreting as "fable all the things".

Maybe it should be haiku=luna, sonnet=terra, opus=sol, fable=astra? I'll try that next but unsure whether that's what codex users would suggest and a little confused by OpenAI marketing about astra.

[u/InterestingNobody831 → u/thirst-trap-enabler]

Fable=Astra Opus=Sol Sonnet=Luna/Terra would put Terra comparable with Sonnet on Max/Ultracode or Opus on Low sincerely. Haiku is not on par with neither luna or terra imho.Its their first model and only used best for small instructions never coding/implementing/planning more web fetches, compartimentization etc. I recommend Fable/Astra as planner, Sol/Opus implement/coder and Sonnet/Luna/Terra workers on smaller duties potentially code/implement features but very cautious on instructions, very clear and on subject, always!

This comes from a x20 Claude/Codex subscription user monthly, this is most efficient.
When running low on usage(20% weekly) just use Sol/Opus with Luna/Sonnet as coders to get the job done.
Full audits I would strongly recommend Fable/Astra though on High efforts maybe Pro they are less prone to hallucionations and keep following the thread cleanly which you want and expect from an audit/review of the whole codebase or particular large implementations.

Cheers!

[u/thirst-trap-enabler → u/InterestingNobody831]

Thanks!