Paper trades for 9 weeks, with no override

What was done

On 10 March 2026 u/Powervegeta writes in r/ChatGPT that about two months earlier he gave $1,000 to each of 4 models on a paper account at Alpaca. The same prompt runs every weekday before the market opens, with Deep Research, and everything is logged with Python on GitHub. The model chooses BUY, SELL, HOLD or CANCEL. He is not allowed to override. After 9 weeks he writes that ChatGPT leads with +20% in the line above the image, and with +21.1% in the list. ChatGPT sat in cash and refused to trade for almost 3 weeks, then went all-in on healthcare, and IOVA doubled. ACHC is at +52%. Perplexity is at +1.1% after leading for 5 straight weeks, with one small biotech position and $977 in cash. Gemini is at -6.6% after trying crypto mining, meme stocks, including GME in 2026, and biotech. Almost every one of those trades was stopped out within days. Claude is at -11.5%, is the most active, buys high and gets stopped out low, and is up 43% on the same IOVA. The S&P 500 is at -1.5% over the period. He writes that ChatGPT is beating the market by 22+ points, that Perplexity is slightly ahead, and that Gemini and Claude are behind.

How it went

He will run the experiment for 3 more weeks, so that in total it becomes 3 months, before he thinks about a new setup. He writes that he does not know whether newer models affected the result.

Worth knowing

The account is paper, not real money. The line above the image says +20%, and the list says +21.1%. The post does not name the other shares that were bought. Check the original. This is not investment advice.

How to do it

1. Use a paper account. Run the same task every weekday before the market opens.
2. Let it answer BUY, SELL, HOLD or CANCEL, and read the log before anything touches a live account.
3. Do not pay and do not place a live order until you say yes.