Before you decide which AI assistants to optimise for, look at which ones people go looking for. We measured monthly Google searches for nine assistants in the US and the UK.
Monthly Google searches for each assistant’s unambiguous brand terms — the ones that can only mean the AI product.
| Assistant | Terms counted | US / month | US share | UK / month | UK share |
|---|---|---|---|---|---|
| ChatGPT | chatgpt + chat gpt | 86,230,000 | 90.6% | 38,370,000 | 96.8% |
| Gemini | google gemini + gemini ai | 5,170,000 | 5.4% | 450,000 | 1.1% |
| Grok | grok | 2,070,000 | 2.2% | 240,000 | 0.6% |
| Copilot | microsoft copilot | 643,000 | 0.7% | 116,000 | 0.3% |
| Claude | claude ai | 558,000 | 0.6% | 168,000 | 0.4% |
| Perplexity | perplexity ai | 190,000 | 0.2% | 107,000 | 0.3% |
| Meta AI | meta ai | 166,000 | 0.2% | 15,000 | 0.0% |
| DeepSeek | deepseek | 161,000 | 0.2% | 151,000 | 0.4% |
| Mistral | mistral ai + le chat | 11,900 | 0.0% | 5,800 | 0.0% |
Bare “gemini”, “claude”, “copilot” and “perplexity” are much larger, but they mix the AI products with a star sign, a first name, GitHub Copilot and an English word. We report them separately rather than add them in. Ahrefs’ own parent-topic grouping is shown so you can judge the mix.
| Search term | US / month | Ahrefs parent topic (US) | UK / month | Ahrefs parent topic (UK) |
|---|---|---|---|---|
gemini | 11,370,000 | gemini | 989,000 | gemini |
claude | 2,680,000 | claude | 480,000 | is claude down |
copilot | 2,470,000 | microsoft copilot | 990,000 | copilot |
perplexity | 1,010,000 | ai | 254,000 | perplexity |
openai | 3,170,000 | openai | 551,000 | openai |
anthropic | 550,000 | anthropic | 62,000 | anthropic |
Even counting every bare “gemini” search as the AI product, ChatGPT would still be searched about 5× as often in the US.
Volumes are Ahrefs Keywords Explorer estimates of average monthly Google searches in the US and UK, pulled on October 25, 2026 through our SiteWide connector. We planned 20 countries; our API allowance ran out after two, so this edition covers the US and UK only and we will extend it rather than estimate the rest. “Grok” is counted bare because Ahrefs files it under its own topic, but it may include a small number of unrelated searches. “Le chat” in the UK sits under a typo topic in Ahrefs and is negligible either way. Google searches exclude searches made inside the assistants’ own apps.
You are welcome to quote and chart these figures with a link back. Suggested citation: Mentioned, “ChatGPT vs Gemini vs Claude: Which AI Assistants People Search For in the US and UK,” October 25, 2026, https://mentioned.at/learn/ai-assistant-search-demand. Data and text are published under CC BY 4.0.