This statement needs qualifiers.

Are you claiming you have a raw binary to Fable and it just reverse engineered it by reading it? Or are you claiming (like for every other model released in the past 1.5 years) it's using an integration with Ghidra or BinaryNinja to assist - in which case I completely disagree even a 30B model can do that with those tools.

Also an FYI, AI advancement and Anthropic are not synonymous. Someone asking Anthropic to back up their claims is not coping about AI, especially as independent benchmarking of Fable is giving equivalent or slightly above par results to GPT 5.5.

The system card does not use any of the benchmarks used in the previous Opus 4.5+ system cards. All the scores are in Anthropic owned benchmarks. I find it extremely hard to believe the marketing department of the company was not involved in a material release to the public - which is the marketing departments literal job.

Yes with assist tools Fable was able to figure things out Opus 4.8 and ChatGPT 5.5 were unable to. Like significantly better.