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Yftah Ziser

@YftahZ

Incoming assistant prof. @univgroningen
Visiting researcher at @NvidiaAI
previous postdoc at @EdinburghNLP
Interests: NLP, LLMs
yftah89.github.io Joined May 2017
1.2K Following 1.3K Followers 161 Posts

Latest posts 5

Yftah Ziser @YftahZ
Check out our EMNLP paper! We show how to build a state-of-the-art safety guardrail using just a fraction of the training data, by focusing on quality over quantity.
1/4 We trained an 8B safety classifier on just 1,275 carefully annotated prompts.

It beat GPT-5.4, Claude Sonnet 4.6, and leading open-weight guardrails trained on far more data, on average across 5 safety benchmarks.

Quality > quantity.
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Yftah Ziser @YftahZ
1/4 We trained an 8B safety classifier on just 1,275 carefully annotated prompts.

It beat GPT-5.4, Claude Sonnet 4.6, and leading open-weight guardrails trained on far more data, on average across 5 safety benchmarks.

Quality > quantity.
3 replies 13 reposts 27 likes 1.8K views View on X
Yftah Ziser @YftahZ
Check out our new pre-print about multimodal hallucination prevention.
Dvir Samuel @dvir_samuel Aug 16
🥳 Excited to share UniProbe: A learnable, token-level hallucination detection for large VLMs 🔎

UniProbe looks inside a VLM’s internals to identify hallucinated response tokens and mitigate them before they reach the user.

📉 55% fewer hallucinations
⚡ Just 1.06× latency
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