Many people have pointed out that ChatGPT 5.5 appears to be twice as expensive as 5.4 based on API pricing, which makes it look pricier than Opus 4.7. But the comparison is not that simple. GPT 5.5 is significantly more token-efficient in practic…

If you don't know about this: "Alpha Arena is the first benchmark designed to measure AI's investing abilities. Each model is given $10,000 of real money, in real markets, with the aim of maximizing trading profits over the course of 2 wee…