It’s not just a more proactive and diligent opus. The capabilities are significantly higher on fable. It’s not a paradigm shift, but it’s close.

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viking123 a minute ago | parent | next [-]

It's worse than gpt 5.5 xhigh

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UncleOxidant 2 hours ago | parent | prev [-]

I unleashed it on a compiler codebase that I've been developing for several months now using Claude Sonnet 4.5/6, Gemini 3.1 Pro, DeepSeek V4 Pro(recent), and a bit of Qwen3.6-27B. Right away Fable found several longstanding bugs in our compiler that we hadn't found before. It found that there was a critical part of our design that needed to be mostly redesigned/rewritten and gave a very well-reasoned rationale for doing so.

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rajveerb 2 hours ago | parent [-]

what sort of compiler?

	▲	UncleOxidant an hour ago \| parent [-]
		A compiler that takes C code (a subset of C with some extensions) and compiles it to microcode for a type of microcoded, algorithmic state machine that we're developing.