Observed Signal · Nov 27, 2023 · Technical Release · Source: Trending Topics · Impact: 2/5 · Sentiment: Neutral
Vectara Ranks AI Chatbots: GPT-4 Lowest Hallucination, PaLM Highest
Vectara, a Palo Alto-based startup, developed the Hallucination Evaluation Model (HEM) to measure how often large language models introduce hallucinations when summarizing documents. The November 2023 ranking shows OpenAI's GPT-4 and GPT-4 Turbo with the lowest hallucination rates at 3.0%, followed by GPT-3.5 Turbo at 3.5%. In contrast, Google's PaLM 2 Chat had the highest rate at 27.2%. Meta's Llama 2 models performed relatively well, while Cohere and Anthropic's Claude 2 showed moderate rates. The ranking underscores the persistent challenge of hallucination in generative AI, which hampers enterprise adoption and trust.
Provides benchmark data on LLM hallucination rates, relevant for enterprise AI adoption but not a major industry shift.
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Key Takeaways & Evidence Grounding
- Vectara's HEM measures hallucination rates in LLMs during document summarization.
- GPT-4 and GPT-4 Turbo have the lowest hallucination rate (3.0%) among tested models.
- Google's PaLM 2 Chat has the highest hallucination rate at 27.2%.
- Meta's Llama 2 70B hallucinated 5.1% of the time in the ranking.
- Anthropic Claude 2 has a hallucination rate of 8.5%.
Connected Companies & Entities
6 Entities mapped“Hier zeigt sich klar, dass OpenAI mit GPT-4 der Marktführer ist......”
“gefolgt von Llama 2 von Meta Platforms...”
“dem Modell von Cohere, einem kanadischen AI-Startup...”
“Anthropic mit Claude 2...”
“Palm 2 von Google...”
“Im Ranking fehlt aber etwa noch Pi von Inflection AI....”
Ontology Mapping & Concepts
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