ResearchResearch paperLarge Language Models · Safety & Alignment · Robotics & Embodied AI1 source · Oct 19, 2026

EvalRx: Agentic Diagnosis and Verified Repair of Foundation Models

We introduce EvalRx, an open-source agentic framework for statistically grounded model diagnosis and repair.

Key points

  • Model evaluation reveals where models fail, but rarely why or whether a proposed fix genuinely works.
  • EvalRx discovers systematic failure modes, explores candidate mechanisms, formulates falsifiable hypotheses, and verifies them by executing frozen, pre-specified tests before using supported diagnoses to guide tiered repair.
  • Across language, vision-language, and audio-language settings spanning Gemini, Qwen, Gemma, and Nemotron, EvalRx improves performance in all 12 evaluated model family-modality combinations, with gains ranging from +1.4 to +10.9 percentage points (+5.8 points on average).
  • These results show that model evaluation can serve not only to measure failures, but to support an auditable process for diagnosing and repairing them.

Sources (1)

  • [1]EvalRx: Agentic Diagnosis and Verified Repair of Foundation Models
    arXiv (AI, ML, NLP, CV, robotics, multi-agent) · Oct 19, 04:28 AM
    We introduce EvalRx, an open-source agentic framework for statistically grounded model diagnosis and repair.
    Model evaluation reveals where models fail, but rarely why or whether a proposed fix genuinely works.

Extractive summary: sentences quoted from the sources.

Before this

  1. Oct 18, 2026We all joke about our rigs being space heaters, so I had Qwen vibecode it
  2. Oct 17, 2026A Symmetry-Matching Approach to Blind-Spot Reduction in Sparse Autoencoders
  3. Oct 17, 2026Which Long Documents Matter? A Controlled Study of Data Selection for Context Extension
  4. Oct 17, 2026Nemotron 3.5 Bolt, Muse Spark Open, and a Fast LFM2.5 24B
  5. Oct 16, 2026Hugging Face ❤️ TorchTPU: TPUs, Natively
  6. Oct 16, 2026axolotl-ai-cloud/axolotl v0.21.0

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