1. Julius AI ($17.99/mo) vs Claude 3.5 Sonnet (Free). 2. Pros/Cons: Julius cleans fast; Claude is safer. 3. Best: Julius, but always double-check cuz hallucinations happen!!

> specifically built for robust data science tasks

Can you clarify your budget first?? Stumbled on this today and honestly, value is everything. I've compared Numerous.ai ($10/mo) vs Julius AI ($17.99/mo). Numerous is way cheaper for basic cleaning, but Julius handles that complex regression stuff much better. Are you doing this daily or just for one project?? Lmk cuz that changes the value proposition... those timeouts are the worst, I feel u!! gl

Saved for later, ty!

Agreeing with Michael here—thinking about the long-term workflow is key. If you're worried about accuracy in multi-variate regressions, honestly the Wolfram ChatGPT Plugin is the only way to go. Unlike the standard model which basically predicts the next token, Wolfram actually computes the math via their engine, so no hallucinations on the stats side. Two quick tips for your marketing data:

• For files that keep timing out, try breaking your CSV into monthly chunks before uploading to stay under the active memory limit.
• Always define your schema in the first prompt (e.g., 'Column A is Category, Column B is Revenue') to prevent the AI from misinterpreting headers during cleaning. That symbolic computation really makes a difference when you're doing deep dives tho.

Late to the party but I love this thread!! Everyone has such amazing ideas and honestly this data analysis stuff is so exciting once it actually works right. Im still a bit of a newbie with the heavy lifting and super worried about things breaking or being inaccurate tho... safety first right?! Before I share what worked for me i gotta ask what specific version of Excel or Sheets are you using?? Im super curious because I had some major compatibility issues with certain plugins when I was switching between my laptop and the office computer. It would be a nightmare if you set everything up and then it didnt sync properly!! Two quick tips if you're worried about reliability like I am:

• Try running your cleaning steps in Microsoft Excel 2021 with Power Query first just to get the nulls sorted before you even touch an AI plugin.
• Always test your prompt on just the first 10 rows to see if the logic holds up. Let me know about your OS tho, really want to make sure whatever you pick actually stays stable!!

Exactly what I was thinking

> specifically built for robust data science tasks

ok so honestly im super happy with Coefficient for Google Sheets and Excel lately. it basically handles massive cleaning and DB connections way better than the standard chat interface!! gl!

Great info, saved!

Commenting to find later

Ok so looking at what everyone has suggested, it seems like Julius and Coefficient are the go-to recommendations for quick cleaning and basic sheet integration. But from a long-term ownership perspective, if you are doing this daily, you need something more robust to avoid those timeout issues and hallucinated stats. I have been using Rows.com for nearly a year and it is honestly a lifesaver for marketing data. It functions like a power-user spreadsheet with built-in AI that connects directly to your data sources, so you are not constantly uploading massive CSVs. This basically eliminates the session timeout problem you mentioned because the data lives in the cloud, not just in the chat memory. For the complex math part, I swear by the Wolfram plugin. Unlike standard LLM logic, it uses a computational engine to run regressions, so the output is actually mathematically sound. It is the industry standard for a reason when it comes to avoiding calculation errors. TL;DR: Skip the basic plugins and use Rows.com for handling large datasets without timeouts, and pair it with Wolfram for specialized statistical tasks where accuracy is non-negotiable.

To add to the point above: it seems like the group is split between using Julius AI for the heavy cleaning and Wolfram ChatGPT Plugin when you need the math to actually be right. Honestly tho, it is just ridiculous that we even have to hunt for these workarounds. It drives me crazy how these companies charge a premium for tools that choke on a standard CSV file. You spend half your day just trying to keep the session alive or double-checking if the AI made up a data point because it got lazy. It is such a mess and honestly feels like a scam when the reliability is this low. Companies clearly dont care about the pro users who actually need this for work... they just want the hype.

• Constant timeouts ruining the workflow.
• Paying for multiple subs just to get one job done.
• Software that feels like a beta version being sold as a finished product. It is just exhausting dealing with this daily, ngl.