ResearchResearch paperLarge Language Models · Robotics & Embodied AI · Training & Scaling1 source · Oct 14, 2026

Evaluating Agentic Capabilities Before Post-Training: An End-to-End Approach

We introduce ASAP (Agent Scaffold Adaptation for Pretraining Evaluation), a lightweight framework for eliciting and evaluating agentic behavior from pretrained base models on end-to-end tasks.

Key points

  • Agentic capabilities are increasingly important for modern LLMs, yet remain difficult to evaluate during pretraining.
  • Rather than converting base models into chat-style agents, ASAP preserves the completion interface and adapts existing agent scaffolds through structured trajectory continuation, short reference prefixes, and minimal recovery mechanisms.
  • These trajectories provide a behavioral view of how agent-relevant capabilities change during pretraining and how execution patterns differ after post-training.
  • Our results suggest that end-to-end agent evaluation can complement conventional pretraining benchmarks by providing a practical diagnostic of interactive model behavior.

Sources (1)

  • [1]Evaluating Agentic Capabilities Before Post-Training: An End-to-End Approach
    arXiv (AI, ML, NLP, CV, robotics, multi-agent) · Oct 14, 02:21 AM
    We introduce ASAP (Agent Scaffold Adaptation for Pretraining Evaluation), a lightweight framework for eliciting and evaluating agentic behavior from pretrained base models on end-to-end tasks.
    Agentic capabilities are increasingly important for modern LLMs, yet remain difficult to evaluate during pretraining.

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