Everyone talks about 4o so positively but I’ve never consistently relied on it in a production environment. I’ve found it to be inconsistent in json generation and often it’s writing and following of the system prompt was very poor. In fact it was a huge part of what got me looking closer at anthropics models.

I’m really curious what people did with it because while it’s cool it didn’t compare well in my real world use cases.

I preferred o3 for coding and analysis tasks, but appreciated 4o as a “companion model” for brainstorming creative ideas while taking long walks. Wasn’t crazy about the sycophancy but it was a decent conceptual field for playing with ideas. Steve Jobs once described the PC as a “bicycle for the mind.” This is how I feel when using models like 4o for meandering reflection and speculation.

For json generation (and most API things) you should be using “structured outputs”