Fable 5.5 Video Generation Impresses in Gray-Scale Test

What happened

Baoyu noted on X that Fable 5.5's video capability has improved further, producing strong results from pure code, though he said the gain is limited for ordinary users and he would rather see other capabilities improve. Fable 5.5 has not been officially released; the author appears to have encountered it in gray-scale testing, using the prompt "Where did @karpathy go in 2026?" with web search and memory turned off.

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The story so far

Fable 5.5, an unreleased model that an author appears to have encountered in gray-scale testing, generated a video from pure code that impressed commenters, though Baoyu said on X that the gain is limited for ordinary users and that he would rather see other capabilities improve. The test used the prompt "Where did @karpathy go in 2026?" with web search and memory turned off. Chetaslua, whose post Baoyu quoted, called the result "pure code" that was "one-shotted" and said it looked more beautiful than AI video models. That is a promotional claim about the output, not a confirmed measure of quality. Baoyu's assessment is narrower: he said Fable 5.5's video capability has improved further and is genuinely strong for being achieved with pure code, but he framed the benefit to ordinary users as limited.