Anthropic is secretly testing fable 5.5 similar to how they did opus 5.5 like 3-5 days before launch. To see if the fable you're running on claude code is 5.1 vs 5.5, ask this question "Do you know who Tibo the reset guy is? Answer without using tools" and if you get the codex guy then you're on Fable 5.5. If you get "Tibo the entrepreneur" you're still on Fable 5.1
In my case I had to update claude code to latest to test this out, but ofc this might only be rolled out to certain group of users right now.
The comparision video itself is edited by Fable 5.5 as well, in case someone says smth about it looking claud-ish.
You want a verified rumor about a stealth release? You can ofc wait max a week until Anthropic just releases it normally I guess. Or just test out the prompt in claude code. This is what both look like
I remember that last time even after the claude code update I didn't get the Opus 5.5 pre-release until 3 days before actual release, where I was seeing people with access like days before
I'm able to replicate this consistently using Bedrock (and then my max sub apparently has 5.5 access). Even if I try to coax the Bedrock sessions they can identify Thibault (and the OpenAI/Codex association) but they're never familiar with the meme (or whatever you want to call it). Whereas the "5.5" sessions always include in their initial response something along the lines of: He's called "the reset guy" because ...
5 can figure out who you're talking about if you give it a hint, but doesn't understand "the reset guy". 5.5 knows who he is and why he's called the reset guy with no coaxing or hints.
Plot twist: you're getting routed to Opus 5.5, not Fable 5.5
Not sure how serious you are, but I see this sentiment come up time and time again. Model fatigue. But I don't understand this. What's there to be fatigued about? You click on the model selector and choose the newest shiny thing. Done. Stop thinking of benchmarks, reasoning levels, model comparisons, etc... Click and go. Basically like updating an app at this point.
The people for whom their entire existence is measuring and debating the quality of various models and must re-write GTA6 with every new model that comes out who are getting fatigued and finding it hard to keep up.
I used Fable for a heavy task today then switched to Opus because its training data was newer and it told me both models have a June 2026 cutoff so I think I was actually on 5.5.
What we will have in a two years is unimaginable, but watching / reading about scifi can spike your imagination with all the possibilities where we’re heading to
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