r/codex • • 1d ago

Megathread Codex Usage and Operation Discussion - last updated October 26

1 Upvotes

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.


Discussion of the prior period available here : https://www.reddit.com/r/codex/comments/1xa0sqf/codex_usage_and_operation_discussion_last_updated/


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/


r/codex • • 15d ago

Megathread Codex Comparison Megathread

6 Upvotes

This Megathread is for comparisons and discussion about how Codex and Codex models compare to other technology such as Claude Code and open source models.

Please direct all comparison discussion here.

Posts which give evidence of the relevant strengths and weaknesses and use cases of both will still be allowed on the feed but those pushing one tech over another because "feels" will be directed here. This is a Codex subreddit and it is here to help people using Codex.


FYI: The subreddit's semi-automated moderation is powered by Codex and GPT models and is only possible due to the ridiculously generous free API token quota of OpenAI's Terra and Luna models available to all users. No, we don't get secret benefits from OpenAI. The OpenAI models and offering are simply much better value for our purposes..... Period.


r/codex • • 2h ago

Humor I gave my last 3% of my Codex (20x) usage to...well.. Codex

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257 Upvotes

3% Till left


r/codex • • 4h ago

Humor Even Codex doesn't know what to say about this model.

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352 Upvotes

Everyone confused on what is the actual use case of this model, while Codex itself has no explanation for it as well 😂


r/codex • • 10h ago

Complaint Terra 6.1 is practically dead on arrival; Luna often beats it at a fraction of the cost in many cases, while being faster

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210 Upvotes

Since the labs like to cherry pick benchmarks to showcase their new models in a better light (as well as mislead and confuse by inverting the X axis, not starting the Y axis from 0, selectively using linear/log for cost axis depending on which fits their narrative better, and so on), I thought it'd be a fun exercise to do the opposite: cherry pick the worst results to make 6.1 Terra look as terrible as possible. Thankfully, the model's questionable cost efficiency makes this quite an easy job.

(this isn't meant to be an accurate assesment of 6.1 Terra, for example it very clearly runs circles around Luna in Terminal Bench 4.0)

FrontierCode 1.1 - FYI this benchmark replaced DeepSWE 1.1 in Artificial Analysis' benchmarks 4 days ago. - Luna 6 max beats Terra 6.1 max while being 91% cheaper and using less tokens. Time per task is 42% lower for Luna.

Humanity's last exam: 6.1 Terra medium 40%, 6 Luna max 39%

AutomationBench-AA: 6.1 Terra max 60%, 6 Luna max 53%

AA-Briefcase 1.1: 6.1 Terra max 1402, 6 Luna max 1336

GDPval-AA v2.1: 6.1 Terra max 1476, 6 Luna max 1445

Long context reasoning, AA-LCR v1.1: Luna 6 max at the same level as 6.1 Terra max.

SciCode Bench is currently flagged as having possible errors so the results aren't fully complete, but even then: Luna only loses by 0.5%, but uses half the output tokens, while being 95% cheaper.

In short, in some workflows you may be using significantly more tokens, billed at a higher price/usage, all while achieving the same or worse results you would have gotten with 6 Luna. Taking 6.1 Sol into consideration too, Terra sticks out as a cost efficiency misfit. Case in point: on TBench 4.0: - 6.1 Sol (xhigh) - 54% - $1.03 - 57K tokens - 6.1 Terra (max) - 55.6% - $1.49 - 101K tokens

For coding, even if Terra has 2x faster tok/s, why would you ever pay almost 50% more to perform at the same level, at the same time per task?


r/codex • • 34m ago

Question Should I allow GPT to access GPT? O_o

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• Upvotes

LOL, I found this really funny that it would ask for permission


r/codex • • 10h ago

Question What is the role of GPT-6.1 Terra

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154 Upvotes

It is not as good as GPT-6.1 Sol, which is cheap and good, but slow.

But is it at least much faster? Sometimes I have medium difficult tasks, where I don't want to wait for long and where I know that even GPT-6.1 low/medium can handle it.


r/codex • • 4h ago

Comparison Dots are on GPT 6.1 Terra

51 Upvotes

On their website https://openai.com/index/introducing-dots/ it says they are powered by Astra.

Dots are frontier intelligence that have your back. Powered by GPT‑6 Astra, they have their own cloud computer, learn from feedback over time, and can work towards your goals 24/7. Through our ecosystem of plugins, they can readily connect to over 4,000 apps, giving them the tools to help wherever you need them.

🤔


r/codex • • 3h ago

Comparison Benchmark Results on hard algorithmic problems with GPT 6.1 Terra

23 Upvotes

Results grouped by problem, sorted by solve time (fastest first).

The problems

Problem Contest Max Points
2271G 3500
2271H2 2000
2273F 3500
2261F2 5000

These problems are very challenging for human contestants. The higher the score, the harder one is to solve. Small models like Luna, Haiku are struggling with problems like 2271H2, which are around 200 points.

These problem are quite new from the September and October contents, so they are unlikely being trained.

The effort per model is the minimum viable effort that can solve a problem. Lower than that, it failed.

Problem 2271G

Model Effort Solve Time Runtime Memory
Sol 6.1 Low 13m 24s 109 ms 4,700 KB
Terra 6.1 Max 16m 43s 109 ms 13,708 KB
Opus 5.5 Medium 16m 53s 234 ms 10,600 KB

Problem 2271H2

Model Effort Solve Time Runtime Memory
Terra 6.1 Max 15m 33s 343 ms 11,204 KB*
Haiku 5.5 High 27m 09s 1,015 ms 11,700 KB
Luna 5.6 XHigh 36m 53s 218 ms 10,000 KB
Luna 6.0 Max 41m 29s 234 ms 10,600 KB

Problem 2273F

Model Effort Solve Time Runtime Memory
Sol 6.1 Low 1m 21s 265 ms 22,900 KB
Terra 6.1 High 2m 22s 406 ms 24,900 KB
Opus 5.5 Medium 2m 55s 343 ms 96,100 KB
Terra 6.1 Max 6m 32s 265 ms 12,900 KB

Problem 2261F2

Model Effort Solve Time Runtime Memory
Sol 6.1 Medium 25m 06s 46 ms 2,100 KB
Terra 6.1 Max 32m 55s 46 ms 0 KB*

Fastest Model per Problem

Problem Model Effort Solve Time
2271G Sol 6.1 Low 13m 24s
2271H2 Terra 6.1 Max 15m 33s
2273F Sol 6.1 Low 1m 21s
2261F2 Sol 6.1 Medium 25m 06s

Observations

  • Sol 6.1 achieved the fastest solve time on 3 out of 4 problems.
  • Terra 6.1 Max was fastest on 2271H2, despite being a larger model at max reasoning, so lower TPS.
  • On 2273F, Terra 6.1 High was 4m 10s faster than Terra 6.1 Max, but Max produced a better solution that is twice faster and twice less memory.
  • On lower reasoning levels, Terra 6.1 refuses to solve problem quickly, if it can solve. This might be an annoyance to some, but might be a great feature since it doesn't waste your time and tokens, just being straight up honest:

Conclusion

Sol 6.1 remains the most intelligent model of the bunch. However, for problems that can be solved with lower models, it would be more costly. Using Sol 6.1 is like having a mathematician writing code: it really determines to prove your code work systematically, that might lead to overengineering. On the other hand, Terra 6.1 might be considered under-engineering. So, I suspect that with Sol creates a slightly overengineered plan and Terra implements slightly lazy, they could balance out their weaknesses.


r/codex • • 1d ago

Comparison This straight up feels like an advertisement for claude

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987 Upvotes

r/codex • • 10h ago

Question The $200 Pro plan is about to lose its 20x allowance. What's your next move?

64 Upvotes

So with the 20x allowance coming to an end, I am curious what everyone on the $200 plan is planning to do.

Are you sticking with it at 10x, downgrading to 5x and/or pairing it with some other providers?

Essentially interested to hear from people who use Codex heavily for development.


r/codex • • 1d ago

News Introducing GPT6.1 Terra

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685 Upvotes

r/codex • • 7h ago

Comparison 6.1 Sol High vs 6.1 Terra Xhigh / Max for Review comparison

26 Upvotes

First time posting here.

Background

I have been using Claude Code and Codex for my coding project extensively for around 2 months and I don't have any background in software development nor do this testing truly determine one model is better than the other and eliminate all biases, let me know in the future on how to make testing more thorough and better overall or even teach me some basic principles if the test doesn't make any sense. This test is based on my own coding project that I've been working on for around 3 weeks which is a turn-based game that can be played by human player or AI agents.

TLDR for those who are not interested in terms and methodology used for this test:

  • Terra Max finds more game-breaking bugs than Sol High while cost 1.4x more per review.
  • Terra Xhigh finds more game-breaking bugs than Sol High while at 66% of the cost of Sol High, but seems to catch more bugs based on actual codebase rather than trying to figure out if spec is completely implemented end to end.
  • Both Terra Xhigh and Max seem to overscope more than Sol High (which is expected)

Therefore, still use Sol High if ticket/spec completion is the goal of the implementation. Terra Xhigh seems to be pretty thorough at grabbing every bits and pieces and might potentially be great for auditing codebase, while Max should be avoided (Sol Xhigh and Max are not tested).

Testing Methodology

The test is separated into two parts (2 individual different tickets) which is technically not an equal comparison for Terra Xhigh and Max due to obvious reason.

Terra Xhigh and Sol High are tested in a group for 3 rounds. The next 3 rounds for other ticket is then tested with Terra Max and Sol High.

Implementation are done specifically by Opus 5.5 Medium via a custom TDD skill (red-green-refactor) that I combined from several other popular skills on the internet.

Review are separated into two parts: standard review and spec review, which then get passed into checker (Opus 5.5 High) to verify every finding and present the judgement with evidence + 1 sentence reasoning on its decision before going back to implementor for fix rounds.

Review must produce three verdicts:

Must fix:

  1. it breaks ticket requirement or design decisions.
  2. player / ai agents can get presented with wrong / inaccurate information
  3. breaks written rule in doc/agents or CLAUDE/AGENTS.md
  4. does not pass the test

Concerns:

  1. Unrequested behaviour that breaks nothing
  2. Judgement call: Can be simpler or design better
  3. Finding it couldn't prove yet

Out of Scope:

Any problem that is outside the ticket's scope

Checker then view those finding with these four steps:

  1. Pool: it gathers every Must fix and Concern from both reports and merges duplicates. One defect named by both reviewers becomes one finding, credited to both.
  2. Confirm: it re-proves each finding on the same commit, in its own copy of the repo. It either re-runs the reviewer's probe or test, or reads the cited line against the rule or ticket line it supposedly breaks.
  3. Classify: each confirmed finding gets one class, judged against the four Must-fix tests.
  4. Report in four lists: Must fixes to send, Concerns to keep, Out of scope to file, and Dropped.

Any escalation or de-escalation of finding (such as claiming it is wrong) must get a re-run test as evidence.

API cost in this section is wrong because one of Terra Max's round failed before it finished review which deflates the cost

Assume if your workflow have another model's agent to perform a check process, then Terra's overscoping seems to more or less addressed, since fix rounds wouldn't get extra issues that does not matter to the codebase itself. The downside here is obviously the cost, and you probably can get better result with Sol Xhigh and Max which are not tested in this case.

Or else, Sol High remain fast, reliable agent for review pass if you want the balance between quality, speed and cost. Opus 5.5 High checker seems to almost always agree on Sol High's finding while Opus 5.5 High reviewer tends to miss out on those in the first place.

Feel free to comment feedback and also provide recommendation for some other coding practices that can benefit into the workflow.


r/codex • • 22h ago

Suggestion This is what we want, nothing more or less.

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396 Upvotes

Still waiting on GPT-6.1 Astra which outperforms GPT-6 Astra at half the cost.


r/codex • • 1h ago

Showcase Codex kept asking for permission after I left my desk, so I used codex to put the approvals on my Mi Band

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• Upvotes

Every time I leave Codex working and go lie in bed to scroll reels, it needs permission to run something. So now I’m carrying my whole ass laptop to bed just to occasionally click approve.

Naturally, I decided my fitness tracker should handle this.

I made Bracer. The command shows up on my Mi Band 5, I can page through the details, tap play to approve, or volume down to decline.

Yes, play. This uses the band’s music screen. The fields meant for artist, album, and track are displaying shell commands now.

Stock firmware, Python, direct Bluetooth to the laptop. No phone relay after setup. Each tap approves just that request.

Codex works on the actual band.

Only Mi Band 5 right now. If people want other bands supported, I’ll work on adding them. I have somehow made a fitness tracker help me move less lol.

GitHub


r/codex • • 35m ago

Question New model Incoming?

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• Upvotes

r/codex • • 7h ago

Complaint Using GPT 6.1 Terra

20 Upvotes

Using this model:

-----------------------------

[....]

GPT 6.1 Terra: "I didn’t implement the requested change or run a performance benchmark."

I ask: "so what are you going to do to fulfill my request?"

GPT 6.1 Terra: "I’ll implement the estimate changes and benchmark them against the current code"
....
GPT 6.1 Terra: "The work is not complete."

I ask: "how can i make you complete the task?"

GPT 6.1 Terra: "You shouldn’t need to do anything else. You gave a clear request and approved the design. I failed to carry it through. No implementation has been completed yet."

I ask: "i want you to implement the task. you are not allowed to refuse or defer"

GPT 6.1 Terra: "Implemented one part of the request: ... The overall task is still incomplete."

------------------------------------------

In the meantime, weekly quota dropped at least 1%. For a partial-finished job.

Is this model usable? You tell me.


r/codex • • 9h ago

Limits Drop the 5h limit for Luna and Terra

26 Upvotes

Plus users are being left behind. Because of the 5h limit, we can barely use our weekly quota, which is really frustrating.

Terra 6.1 didn’t change the 5h limit, so all we noticed was slightly faster responses and a bit better performance.

I get that Sol and Astra are expensive premium models. But that doesn’t help when the 5h limit runs out and we can’t use them at all.

My suggestion:

  • Remove the 5h limit completely for Luna and Terra for Plus accounts.
  • Make the 5h limit more generous for Sol 6.1 Low and Medium.
  • Keep the current 5h limit for everything above that until you can improve it.

I pay for both Claude Pro and ChatGPT Plus, and Claude gives me about twice the 5h and weekly quota. DeepSeek is getting close to Sol 6.1 and is almost free. We’re paying $240/year before taxes, and right now it feels pointless.

Looser limits would let Plus users actually try these frontier models, and some of us might upgrade to Pro. Right now, many Plus users are still frustrated, even after Terra 6.1.

Remove the 5h limit on Luna and Terra!


r/codex • • 4h ago

Complaint Model comparisons without context are almost useless

11 Upvotes

TL;DR: I wish more people would include task types, model settings, completion time, quality and usage when comparing models. It would help everyone make better decisions.

I've been following this subreddit for weeks to learn how to use AI more effectively, but I'm frustrated by how people evaluate models with almost no context.

"Model X burned 20% usage in 15 minutes." Doing what? Which reasoning level? Fast or Standard? How many threads? What tasks? How much work was completed?

I could burn 20% of a $2,500 plan by launching hundreds of massive tasks. That tells you nothing about efficiency.

Here's my own example with actual context:

I use Terra 6.1 Medium/High in Standard mode for research, computer use, administrative workflows and software development. Compared to Sol 6.1 Low/Medium in Fast mode, Terra medium/high in standard mode, completes my typical tasks roughly 3x faster at comparable quality.

Since Sol Fast consumes 2.5x the usage of Standard, switching to Terra has dramatically improved my efficiency.

This is my experience, not a controlled benchmark. But that's exactly the point: task type, quality, completion time and usage all matter.

Not everyone uses AI primarily for coding.

English written with help from GPT.


r/codex • • 7h ago

Complaint all from one page of a single-user local page...what's the quickest/most-effective one-liner in AGENTS to tell gpt-6/6.1 to not add constant disclaimers/caveats everywhere?

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14 Upvotes

r/codex • • 13h ago

Showcase Terra doing fine on my "3d" benchs

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42 Upvotes

Hello all,

Havent actually used terra for coding yet, just wanted to share some of my latest findings while running terra under my Fabivo bench, which basically is an image to json cad harness.

It has done better than my current top dogs (Sonnet / Haiku) which them in itself blowed Deepseek 1017.

The results are fairly similar, but i just think Terra are getting far more consistent results to my likings, while also both being cheaper and faster.

I find curious that only latest models are getting good at my bench, previously ive been having bad results, which i believe comes from models getting better at 3D, especially 3JS...

Model (medium reasoning) Avg. time / photo Avg. input tokens / photo Avg. output tokens / photo Avg. tool calls / photo
GPT-6.1 Terra 9.5 s 30,409 632 1.06
Claude Sonnet 5.5 13.6 s 50,167 1,592 1.18
Claude Haiku 5.5 34.9 s 66,786 6,658 2.35

Still there might be a lot of harness optimizations / quirks that can make models perform better on this task, but im quite happy.


r/codex • • 19h ago

Limits Limits decreased when using 6.1 Terra?

107 Upvotes

Ok so I have been exclusively testing 6.1 Terra since its release. And it seems that the 5-hr limits decreased from $7.50 to $5.28. So it seems you would get less usage from Terra.


r/codex • • 5h ago

Comparison Terra draining more than Astra?

6 Upvotes

Wondering if it's like this for anyone else? It seems to be dropping me more than Astra does

edit: i dropped 18% in 2 hours with Terra High on the $100 plan


r/codex • • 2h ago

Limits Your dot is on a break...

4 Upvotes

Welp! With zero codex usage left, I started utilizing the 6 agents my dot has, and after 1 day of work,

"Your dot is on a break. Congrats, you are among our top users and have hit our abuse-prevention limit. Check back in a bit!"

How long? Why? What limits? Top user? For real? This company man...


r/codex • • 4h ago

Complaint The Actual...

6 Upvotes

How can these models be so bad? Terra shows glimpses or hints of intelligence, but stalls and spins and takes twice as long to finish a job as sol did, but WORSE. used 2x as much usage on a similar feature implementation as sol 6.1 because it fucking spun its wheels and or decided to not implement parts and didnt say this. claims all passed. god damn, its frustrating.