> Fable 5.2 is not 21 times better than GPT 6.1 Sol, I find it hard to justify this.

How is this relevant? I'm willing to pay 21x more as long as the cost is less than my value of time saved

Most other competitive models will do the task at 90-105% of the performance, for 50% of the cost, and 1/3 the time.

AI generally underperforms human, so is "raw quality" is the only metric you would not use an AI. Time-to-completion-at-quality is usually pretty important and Fable is not good there.