The Gemini vs ChatGPT market share is shifting fast. SimilarWeb’s new Global AI Tracker shows OpenAI’s web traffic lead is shrinking while Google’s Gemini gains speed. ChatGPT still leads by a wide margin, but Gemini crossed 20% market share and keeps rising. This change reflects product bundling, defaults, and stronger distribution. ChatGPT still leads the AI chatbot category on the web. But the gap is closing. Over the last year, SimilarWeb’s Global AI Tracker shows ChatGPT’s share fell from 86.7% to 64.5%. In the same period, Google’s Gemini grew from 5.7% to 21.5%. Gemini passed the 20% mark for the first time and more than tripled its share in six months. The data tracks web traffic only, not native app usage. Still, the trend is clear: distribution and ecosystem power matter.

Gemini vs ChatGPT market share: What the numbers say

ChatGPT is still number one, but the lead is smaller

OpenAI’s ChatGPT holds 64.5% of the global web traffic share in generative AI. It is still the market leader by a wide margin. But it is losing ground in a steady way. A year ago, ChatGPT had 86.7%. That is a drop of more than 22 percentage points in twelve months. The last six months were the toughest. ChatGPT shed almost 15 points during that time. This pattern matches a typical market shift. A first mover dominates early. Competitors then catch up, driven by better distribution and bundling. OpenAI now faces rivals with huge user bases and deep product ecosystems. The fight is no longer only about model quality. It is also about reach, defaults, and integrations users already use every day.

Gemini gathers speed across Google’s ecosystem

Gemini is the biggest winner. It climbed from 5.7% to 21.5% in one year. Six months ago, Gemini was at 8.6%. By the end of 2025, it was 18.2%. Now, it crossed 20%. The driver is clear: Google owns search, Android, and Workspace. When Google inserts Gemini into these core touchpoints, discovery and adoption jump. Google also moved past early stumbles. Bard’s launch had issues. But the company iterated fast, rebranded to Gemini, and tightened integration. Once Gemini showed up in search features, mobile surfaces, and productivity tools, it gained momentum. For many users, “AI” is now one tap inside tools they already trust.

Method matters: These are web shares, not total usage

The Global AI Tracker looks at website traffic only. This is important. It does not count native app sessions on phones, tablets, or laptops. That means we cannot see how often people use ChatGPT or Gemini inside mobile apps. We also cannot see usage inside embedded contexts like OS-level features. So read the data as a signal, not a full map. Web share likely reflects:

• Top-of-funnel discovery and casual use
• Traffic from search and social links
• Logged-out or lightweight sessions

It does not fully capture:

• Daily mobile app use and notifications
• Enterprise seats tied to productivity suites
• OS-level shortcuts and chatbot panels
• API traffic from developers and products

Even with that limit, the direction is clear: Gemini is winning attention across Google surfaces. ChatGPT still owns the category, but the advantage is smaller.

The middle tier reshuffle: Grok up, Perplexity down

Grok rides X integration

Grok from xAI rose from zero to 3.4% in a year. Three months ago, it passed 2%. Growth is faster now. The obvious driver is the link with X (formerly Twitter). X gives Grok distribution and real-time signals. Elon Musk’s promotion also keeps Grok in the news. Grok is now almost tied with DeepSeek at 3.7%.

DeepSeek stays steady

DeepSeek had a lead over Grok six months ago (4.8%). It now sits at 3.7%. The service holds a solid niche with steady interest. But Grok’s social distribution helps it catch up.

Perplexity slips after a brief high

Perplexity peaked at 2.4% three months ago. It now sits at 2.0%. A year ago, it held 1.9% and led many newer rivals. Perplexity focuses on AI search with citations and fast answers. The experience is strong, but the middle tier is crowded. When a service lacks default placement, growth can stall. Grok’s social link and Gemini’s Google footprint make the climb harder for a standalone search player.

Claude and Copilot: stable but small

Anthropic’s Claude sits around 2.0% with little change. Microsoft Copilot is at 1.1% and is slightly down. This is notable given Microsoft’s strong bundling in Windows, Edge, and Office. It may show that Copilot’s usage is shifting to apps and in-product surfaces not counted in web shares. Or it may show that ChatGPT and Gemini capture most mainstream attention.

Why distribution beats features

The power of defaults and bundling

Winning in consumer AI is not only about model benchmarks. It is also about distribution. Google and OpenAI both invest in model quality. But the growth curve shows that distribution can decide speed. Key lessons:

• Defaults drive behavior. If Gemini sits inside search results, Android, and Gmail, users try it without effort.
• Bundled value lowers friction. If a Workspace user sees Gemini in Docs or Meet, they click it, learn it, and keep it.
• Brand trust matters. People try AI where they already do their daily work.
• Free tiers and simple pricing help. Low-friction access grows top-of-funnel traffic fast.
• Cross-surface presence wins. Presence on web, mobile, and productivity tools compounds adoption.

Product quality still matters

Distribution gets the first click. Quality keeps the user. Users will stick with models that answer well, cite sources when needed, and help with real tasks. Retention will belong to services that are fast, accurate, and easy to use during daily work.

How to act on the shift if you are a user or a team

For individual users

• Try both ChatGPT and Gemini for your top tasks. See which one is faster or clearer for you.
• Use the service that sits where you work. If you live in Google Docs, test Gemini first. If you use many ChatGPT custom GPTs, stay with ChatGPT.
• Keep a second option ready. Some queries are better on one model than another.

For startups

• Adopt a multi-model strategy. Route tasks to the best model for cost and accuracy.
• Build distribution first. Integrate your product where users already are (search, social, work tools).
• Watch acquisition costs. Leverage channels where your users hang out (developer forums, X, YouTube).

For enterprises

• Pilot both models. Measure quality for your domain, not general chat.
• Check data controls. Evaluate logs, regional data storage, and admin tools.
• Plan for redundancy. Keep at least two providers to manage risk and cost.

How to read Gemini vs ChatGPT market share for search and content

Search traffic and AI answers

As Gemini grows, Google can shift more results into AI-style overviews where users stay on Google surfaces longer. This may reduce clicks to external pages for some query types. Publishers and brands should adapt content for AI summarization and for on-SERP engagement. Practical steps:

• Structure content with clear headings, simple language, and concise facts.
• Add first-party data, charts, and original insights that AI summaries prefer to cite.
• Use schema markup to help machines parse your content.
• Target queries where users still click for depth (how-tos, tools, calculators).

Advertising and lead flow

If Google blends more AI answers into search, ad placements may change. Watch shifts in impression share and CPCs across queries where AI summaries appear. Keep creative flexible. Test copy that explains value in a short line, since users may see less of your page before deciding.

Three scenarios for the next six months

• Stable duopoly: ChatGPT stays near two-thirds of web share, Gemini holds 20–25%. Middle-tier services jostle under 5% each.
• Google pushes deeper: Gemini gains more share through tighter search and Android integrations. ChatGPT falls but remains number one.
• OpenAI rebound: A new release or bundle lifts engagement and retention. ChatGPT stabilizes. A dark horse like Grok or DeepSeek benefits from a viral feature and climbs.

The metrics that matter next

Watch more than web traffic to see the true balance of power:

• Mobile app daily active users and time spent
• Enterprise seats and Workspace/Office embed usage
• Retention and cohort depth (day 1, 7, 30)
• Revenue per user and upsell to paid tiers
• API volume and developer adoption
• Latency, reliability, and cost per resolved task

Notes on the data

The Global AI Tracker uses web traffic shares to estimate attention across major AI services. Shares can vary by region and by period. Rounding can hide small movements month to month. Also, different types of usage (apps, in-product assistants) may not appear in web-only data. Despite these limits, the tracker is useful for reading direction: Gemini is gaining, ChatGPT is still on top, and the middle tier is in flux.

What this shift means and how to read it

The past year ended the idea of a single dominant chatbot on the web. ChatGPT remains the leader, but the market is wider, older, and harder to defend. Google’s Gemini shows how default placement and deep integrations can turn a late start into rapid growth. Grok proves that a strong social channel can build share quickly. Perplexity shows that a focused product still needs strong distribution to scale. For users, the best strategy is simple: use the right tool for the right task. For teams, the best hedge is a multi-model stack with clear data controls. For marketers and publishers, the best defense is content designed for both AI summaries and human readers. The key takeaway is clear: read the Gemini vs ChatGPT market share as a sign of distribution power and product fit. The winner is the service that is present where users work, that answers well, and that keeps improving the daily flow. This contest will not be decided by one big launch, but by steady gains across search, mobile, and work apps over time.

(Source: https://www.trendingtopics.eu/googles-gemini-eats-into-chatgpts-market-share-grok-overtakes-perplexity/)

For more news: Click Here

FAQ