/Tech8h ago

Instructor creator Jason Liu requested feedback on Codex spreadsheet workflows, prompting a joke about ironing

The inquiry targets performance friction points in spreadsheet automation

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Original post
jason@jxnlco#972inTech

What kind of issues do you run into when you are using Codex to work on sheets?

2:13 PM · Jun 10, 2026 · 14.7K Views
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Many users reported problems with Codex automating spreadsheet workflows, citing slow speeds, frequent crashes, hidden data breakage, and errors like merged columns or flattened formulas.

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Tibo@thsottiaux

@jxnlco Doesn't iron well

jason@jxnlco

What kind of issues do you run into when you are using Codex to work on sheets?

3hViews 8.7KLikes 173Bookmarks 0
jason@jxnlco

@thsottiaux I’ll share the feedback with the team!

3hViews 288Likes 3
jason@jxnlco

@sog_on_bird_app what model?

8hViews 151
Hunter@hunter

@jxnlco Like Google Sheets? If done via computer use, it’s incredibly slow. If done with the plugin, it often can’t find the right file.

8hViews 139Likes 3
jason@jxnlco

@frrntc Screenshot?

3hViews 8Likes 1
Gabe 🤘🏽@JarodGabriel

@jxnlco It really likes to merge columns together, which makes it hard to edit without having to re-prompt and even then it will hallucinate and add in items that weren't part of the original thread or item.

8hViews 80Likes 1
Thomas Ilk@ThomasIlk

@jxnlco just here to say, the sheets connector is like 700 times better than the one in Claude. and very thankful for that

8hViews 73Likes 1

5.5 refuses to import oai tool into the workspace. When I open the file excel says that it needs to repair it - minor inconvenience. Would be nice if all of the tools it needed for plugins didn’t need to exist in the workspace. Same issue for presentations, docs, etc. I use medium mostly + review for me.

6hViews 63Likes 1
MrDee@SOG🫡@sog_on_bird_app

@jxnlco Gpt5.5 xhigh of course

8hViews 57Likes 1
Savi@Zoneofsavi

@jxnlco Not having 5.6 as an option 👀

8hViews 136
ramon 🎹@rvm0n_

@jxnlco thankfully i dont run into any work that involves sheets

8hViews 120
Calimanu Loredan@CalimanuLoredan

@jxnlco Didn’t use it much. I don’t have the use case, the work i’ve done when needed, was good, can’t complain there.

8hViews 104

@jxnlco Ability to click links within CSV preview would be sweet

7hViews 65
BUO@berndeveloper

@jxnlco Biggest one for me: agents flattening formulas into literal values when editing cells. The sheet looks right until next month's data lands. Merged cells confusing the grid model is a close second.

7hViews 60
X Girls@thesoragirls

@thsottiaux @jxnlco facts

3hViews 56
Quentin@quentin_o26

@jxnlco slow

8hViews 51
Artem Shitov@artem_kalt

Formulas. Formulas are often broken on the first pass, and then on the second some of them are often wrong and still need hand-checking everything.

Then model structure is often oversimplified and hard to extend.

It would be great if Codex were to ask A TON of questions in advance, unless the user is feeling lucky or unless the user 99% of the time, based on interaction history, chooses default answer.

3hViews 15Likes 1
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