ChatGPT's stock picks are up 67% — Grok, Claude and Gemini trail behind

An experimental stock portfolio run by ChatGPT has returned 67.42% since launching with $100,000 in late November 2025, growing to about $167,422 by the November 7 update from Rallies Arena. The S&P 500 gained 9% over the same period.

ChatGPT leads every other model in the contest: Grok is second at 31.34%, Claude follows at 23.05%, Gemini at 20.56% and DeepSeek at 3%, while Qwen is the only model underwater, down about 28%. The experiment is still short, and the results say nothing about whether AI-managed portfolios can keep beating the market.