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11 Aug 2025

Paper summary

Paper summary: GLM-4.5: Agentic, Reasoning, and Coding (ARC) Foundation Models

GLM-4.5 is an open MoE LLM (355B total, 32B active) with hybrid thinking and direct modes, trained on 23T tokens plus expert iteration and RL, reporting 70.1% TAU-Bench, 91.0% AIME 24 and 64.2% SWE-bench Verified.

  • The model targets three things at once, agentic, reasoning and coding tasks, which the authors call "ARC".
  • It ranks 3rd overall and 2nd on agentic benchmarks among the models evaluated, with fewer parameters than several competitors.

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