The LLM Ran the Backtest. That’s Exactly Why You Should Panic.

TL;DR: For a year the standard critique of LLM-designed strategies was the model can t actually do the math — the backtest is hallucinated. That critique is now dead. ChatGPT, Claude and Gemini all execute real, sandboxed Python with pandas and Matplotlib (OpenAI, Anthropic, Google). The code runs. The Sharpe is computed, not written. And that... The post The LLM Ran the Backtest. That s Exactly…