We've usually stayed away from model comparisons but 5.6 vs Fable is a unique situation We've never had a case where the team is so complete…

We've usually stayed away from model comparisons but 5.6 vs Fable is a unique situation We've never had a case where the team is so completely convinced on which one is better Here's the timeline of our experience with it - We test early versions of 5.6 for a couple of weeks and have a great time, it feels like a step change improvement, enabling new workflows - We get to try Fable and don't think it's not as good, I personally would take this experience with a grain of salt, there tends to be a bias when trying a new model when you already like another - Fable and 5.6 are taken away because of the regulatory issues - Our team is literally depressed that 5.6 is gone, we are looking for anything that could even partly replace it - Fable comes back, and here's where it gets interesting, you would think Fable would be enough, but no, the team is still depressed that 5.6 isn't available - Then 5.6 comes back and it's immediately clear that it's just way better than Fable This situation was unique in that it was the closest we've ever gotten to having an unbiased comparison of two models

Source: Sam Altman (X) | 2026-07-08