Hook

Their other posts in the index, biggest breakout first.
Fable 5 at half the price?! Claude just launched Opus 5 and this is exactly why it's the most important AI model all year. In 50 seconds. The whole story here is that Opus 5 is very similar in performance to Fable 5, outperforming it on some tasks that you can see here. But at a fraction of the cost. The price problem. Everyone and their dogs were complaining about how expensive Fable 5 was when Claude came out with it. The rationale for Fable 5 being so expensive was because of how highly performant it was. There was no other model in the world like it. But that changes with Opus 5. Opus 5. You can use it with your Claude plan at half of Fable 5. It here, outperforming Fable 5 on agentic coding, which is probably the most important AI task right now. And although GPT-5.6 comes close on a variety of effort levels, you can tweak your effort level for Opus 5 to be a lot lower, which all you're doing is simple tasks. This wind tunnel simulation task is also very interesting because it requires a model to have very wide broad understanding and the physics and the object within these. See ya.