A new report has found that AI chatbots, including OpenAI and Meta’s models, include false information in every third answer.

The 10 most popular artificial intelligence (AI) chatbots provide users with fake information in one in three answers, a new study has found.

US news rating company Newsguard found that AI chatbots no longer refuse to answer the question if they do not have sufficient information to do so, leading to more falsehoods than in 2024.

Which chatbots were most likely to generate false responses?

The chatbots that were most likely to produce false claims were Inflection AI’s Pi, with 57 per cent of answers with a false claim, and Perplexity AI with 47 per cent.

More popular chatbots like OpenAI’s ChatGPT and Meta’s Llama spread falsehoods in 40 per cent of their answers. Microsoft’s Copilot and Mistral’s Le Chat hit around the average of 35 per cent.

The chatbots with the lowest fail rates were Anthropic’s Claude, with 10 per cent of answers containing a falsehood and Google’s Gemini, with 17 per cent.

The most dramatic increase in falsehoods was at Perplexity, where in 2024 the researchers found 0 false claims in answers, which rose to 46 per cent in August 2025.

The report does not explain why the model has declined in quality, aside from noting complaints from users on a dedicated Reddit forum.

Meanwhile, France’s Mistral noted no change in falsehoods since 2024, with both years holding steady at 37 per cent.

The results come after a report from...

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