I've been using Fable on and off since the promotion started and have been fairly impressed with it, so I consider this great news!
At the same time, I sense a lot of negativity (especially on HN) in comparison to Codex from OpenAI (who IIUC is bleeding money to keep this going, though maybe Anthropic is too) which didn't do as many promotional and nerf-ing shenanigans.
As somebody who doesn't want to constantly switch tools, is Codex really that much better, or is this sour grapes from folks who want to stay on the subsidized access plans and are mad at Anthropic's pricing model?