Brandwave

ChatGPT vs Gemini:Which is more popular?

In September 2026, ChatGPT had more branded searches than Gemini among generative AI platforms worldwide. ChatGPT had about 1903.3 million branded searches, while Gemini had 687.9 million. ChatGPT made up 69.3% of all generative AI platform searches we track, and Gemini accounted for 25%. When we asked ChatGPT and Google AI Overviews about generative AI platforms, Gemini appeared in all five answers and ChatGPT in four. ChatGPT was mentioned before Gemini in four out of five answers.

Among generative AI platforms worldwide in September 2026

Who do people search for more?

ChatGPT, about 3 searches for every 1 for Gemini

ChatGPT 1903M searchesGemini 688M searches

Who does AI mention more?

Gemini, mentioned in every answer we collected

Gemini in 5 of 5ChatGPT in 4 of 5

Who does AI recommend more?

ChatGPT, named ahead of Gemini in 4 of 5 answers

ChatGPT first in 4Gemini first in 1

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Top generative AI platforms in ChatGPT and Google AI Overviews

In three ChatGPT questions and two Google AI Overviews, Gemini appeared in all five answers. ChatGPT was mentioned in four out of five: in all three ChatGPT answers and in one of the two Google AI Overviews. ChatGPT was listed before Gemini in four out of five answers.

Most recommended by AI

Brands get a higher ranking if they are mentioned earlier in the answers.

  1. ChatGPT1st
  2. Claude2nd
  3. Gemini3rd
  4. Microsoft Copilot4th
  5. Perplexity5th
  6. Mistral AI–
  7. Cohere–

Mentioned by AI

Each dot is one answer, filled in when that answer mentions the brand.

  • Gemini5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • ChatGPT4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Claude4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Microsoft Copilot4 of 5Named in 2 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • Perplexity3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Mistral AI0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Cohere0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers

See every answer about generative AI platforms

5 answers

Not named in any answer:

Brands are shown in the order each answer named them. The survey took place in the United States on October 19, 2026.

Is ChatGPT or Gemini more popular in search?

This chart shows how often people search Google for ChatGPT and Gemini by name. Each line represents a brand's share of searches for all seven generative AI platforms we track, month by month, from English-language searches worldwide.

ChatGPT and Gemini among generative AI platforms worldwide, by month

Share of searches by month for ChatGPT, Gemini. The figures are in the table below the chart.

View monthly share of searches table
MonthChatGPTGeminiClaudeMicrosoft CopilotPerplexityMistral AICohere
Oct 202566.7%29.4%0.67%1.5%1.6%0.06%<0.01%
Nov 202570.6%25.5%0.83%1.7%1.4%0.06%<0.01%
Dec 202570%26.8%0.74%1.4%1%0.06%<0.01%
Jan 202669.1%27.7%0.95%1.4%0.86%0.06%<0.01%
Feb 202670.1%26%1.6%1.4%0.87%0.06%<0.01%
Mar 202666%27.8%3.7%1.5%0.82%0.07%<0.01%
Apr 202663%30.3%4.4%1.4%0.78%0.05%<0.01%
May 202665.2%28.7%4.3%1.3%0.56%0.05%<0.01%
Jun 202662.7%30.7%4.8%1.2%0.52%0.06%<0.01%
Jul 202666.4%27.6%4.5%1%0.47%0.04%<0.01%
Aug 202666.5%27.5%4.5%1%0.47%0.04%<0.01%
Sep 202669.3%25%4.2%0.88%0.49%0.05%<0.01%

How has the ChatGPT and Gemini comparison changed over the last 12 months?

3 findings
  • ChatGPT was ahead of Gemini in every measured month of the 12 months ending September 2026.
  • Across the 12 months ending September 2026, ChatGPT’s share of searches among generative AI platforms worldwide moved from 66.7% to 69.3%, and its estimated monthly branded searches moved from 1550M to 1903M.
  • Across the 12 months ending September 2026, Gemini’s share of searches among generative AI platforms worldwide moved from 29.4% to 25%, and its estimated monthly branded searches moved from 683M to 688M.

How did search popularity change for generative AI platforms worldwide in September 2026?

2 changes

  1. In September 2026, ChatGPT gained share of searches among generative AI platforms worldwide, from 66.5% to 69.3%.

  2. In September 2026, Gemini lost share of searches among generative AI platforms worldwide, from 27.5% to 25%.

How are branded searches counted?

51 search terms

Brandwave collects information about searches that people make online using ChatGPT’s and Gemini’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.

ChatGPT

28 branded search terms

  • ai chatgpt
  • chat gpt
  • chat-gpt
  • ChatGPT
  • chatgpt 4
  • chatgpt 4o
  • chatgpt 5
  • chatgpt ai
  • chatgpt app
  • chatgpt atlas
  • chatgpt business
  • chatgpt chatbot
  • chatgpt desktop
  • chatgpt go
  • chatgpt image generator
  • chatgpt images
  • chatgpt openai
  • chatgpt plus
  • chatgpt pro
  • chatgpt search
  • chatgpt voice
  • chatgpt web
  • chatgpt website
  • chatgpt5
  • chatgptapp
  • open ai chatgpt
  • open chatgpt
  • openai chatgpt

Gemini

23 branded search terms

  • ai gemini
  • bard ai
  • Gemini
  • gemini advanced
  • gemini ai
  • gemini ai app
  • gemini ai image
  • gemini ai photo
  • gemini ai photos
  • gemini app
  • gemini bard
  • gemini deep research
  • gemini google
  • gemini image generator
  • gemini live
  • gemini pro
  • gemini ultra
  • google ai gemini
  • google bard
  • google gemini
  • google gemini ai
  • google gemini app
  • googlegemini

How the Brand Demand Index is measured

Other head-to-heads among generative AI platforms

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