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Claude Fable 5.2 matches GPT-6 Astra in weight-space-programming

By PulseAugur Editorial · [1 sources] ·

A recent comparison suggests that Claude Fable 5.2 performs weight-space-programming tasks comparably to GPT-6 Astra. This capability allows models to manipulate their own internal weights, a complex process that could lead to more advanced AI behaviors. The findings highlight ongoing advancements in large language model capabilities and their potential for sophisticated internal operations. AI

IMPACT Suggests advancements in LLM capabilities for complex internal operations.

RANK_REASON Comparison of capabilities between two AI models. [lever_c_demoted from research: ic=1 ai=1.0]

Read on LessWrong (AI tag) →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Claude Fable 5.2 matches GPT-6 Astra in weight-space-programming

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17 / 100
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Tool
Comparison of capabilities between two AI models. [lever_c_demoted from research: ic=1 ai=1.0]
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model release, product
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High
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Breaking (< 6h)
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COVERAGE [1]

  1. LessWrong (AI tag) TIER_1 English(EN) · shawnghu ·

    Claude Fable 5.2 can do "weight-space-programming" about as well as GPT-6 Astra

    <p>Recently <a href="https://www.alphaxiv.org/abs/2611.weight-space-programming">this paper</a> demonstrated that GPT-6 Astra was capable of a bunch of low-level operations on neural networks, including improving Qwen3-0.6B's ability on some math benchmarks and writing some netwo…

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