SE Ranking published an analysis of AI-driven website traffic covering 101,574 websites across 250 geographic markets, tracking referral visits from ChatGPT, Gemini, Perplexity, Copilot, Claude, DeepSeek, Grok, and several smaller platforms. The data covers January 2025 through January 2026, and the trend it reveals is significant: Gemini’s referral traffic to websites is growing at roughly 47% per month while ChatGPT’s is declining at about 8% per month.
ChatGPT still dominates. Nearly 4 out of 5 AI-driven website visits come from ChatGPT, giving it 79.51% of all AI referral traffic. It generates around 8x more traffic than the next-largest platform. But the gap is closing fast, and the direction of the trend is clear enough that the study raises a real question: could Gemini overtake ChatGPT in AI referral traffic before the end of 2026?
The Numbers Behind the Shift
AI platforms collectively account for about 0.24% of global internet traffic. That’s a small share, but it’s growing. In 2025, AI referral traffic was 0.15%. By January 2026, it had grown 1.6x. The growth is accelerating, not plateauing.
The breakdown by platform as of January 2026: ChatGPT at 79.51%, Perplexity at 9.96%, Gemini at 5.29%, Copilot at 3.62%, Claude at 0.89%, DeepSeek at 0.18%, Grok at 0.14%, and other AI platforms at 0.41%.
Those percentages tell the current story. The monthly trajectory tells a different one.
ChatGPT Peaked in October 2025
ChatGPT’s share of global web traffic hit its highest point in October 2025 at 0.2939%. The likely catalyst was the launch of GPT-5 on August 7, which expanded free-tier capabilities and pushed ChatGPT to roughly 700 million weekly active users. Traffic surged through September and peaked the following month.
Then the decline started. November dropped 8.5%. December dropped another 18.6%. January 2026 showed a partial recovery, but even after that bounce, ChatGPT was still 22% below its October peak.
For the first eight months of 2025, ChatGPT’s traffic had been on a steady upward trajectory, more than doubling its share of global web traffic between January and August (from 0.0799% to 0.1801%). The post-October decline broke that pattern. Whether the drop continues, stabilizes, or reverses with future model updates remains an open question.
Gemini’s Growth Arrived with the Gemini 3 Models
Gemini’s traffic was essentially flat for most of 2025. Its share of global web traffic hovered between 0.0083% and 0.0105% from January through August, with no meaningful growth trend. By August, ChatGPT was sending 21.7x more traffic to websites than Gemini. The gap looked insurmountable.
Then the Gemini 3 model family rolled out. Gemini 3 Pro launched November 18. Gemini 3 Deep Think followed on December 4. Gemini 3 Flash arrived December 17. Once Gemini 3 Flash became the default model across both the Gemini app and Google’s AI-powered search interfaces, traffic started climbing immediately.
The growth was steep. November to December: +51.5%. December to January: +42.0%. In just two months, Gemini more than doubled its traffic (+115%), growing around 12x faster than its previous growth rate over the January-October 2025 period.
Gemini Overtook Perplexity
By January 2026, Gemini had passed Perplexity in global AI referral traffic for the first time. Gemini reached 0.0284% compared to Perplexity’s 0.0221%, putting Gemini 29% ahead globally.
Five months earlier, in August 2025, Perplexity had been sending nearly 3x more visitors to websites than Gemini. The reversal happened quickly once Gemini 3 deployed.
In the US market specifically, the gap is even wider. Gemini’s January 2026 US traffic reached 0.0242% compared to 0.0172% for Perplexity, a 41% lead. The US often sets trends for global AI adoption, which makes Gemini’s stronger performance there worth watching.
The Gap Between ChatGPT and Gemini Is Shrinking Fast
Back in October 2025, ChatGPT was sending more than 22x more AI traffic to websites than Gemini. By January 2026, that gap had narrowed to 8x. A 29% reduction in three months.
An 8x gap is still massive. ChatGPT clearly remains the dominant platform for driving visitors to websites. But the speed of the shift is notable. Three months ago, Gemini barely registered as a traffic source. Now it’s the second-fastest growing AI platform in terms of referral traffic, and it’s gaining ground on ChatGPT while ChatGPT’s own numbers are declining.
Could Gemini Actually Catch ChatGPT?
SE Ranking models two scenarios based on the current data. If Gemini continues growing at roughly 47% per month and ChatGPT keeps declining at about 8% per month, a crossover could happen as early as June 2026. If Gemini’s growth rate moderates back toward its longer-term average and ChatGPT stabilizes, the crossover moves closer to October 2026.
Both scenarios assume current trends continue, which is a big assumption. Growth spikes like Gemini’s recent surge rarely continue indefinitely. The initial excitement around a new model family drives adoption, but that momentum typically slows once the novelty settles. ChatGPT’s decline could also reverse with new model releases, feature updates, or integrations.
The more grounded takeaway from the data is about direction rather than specific timelines. Gemini is growing. ChatGPT is flat or declining. Perplexity has been overtaken. The AI traffic landscape that looked like a ChatGPT monopoly six months ago is becoming more competitive.
What the Trend Means for SEO and Visibility Strategy
The practical implication of the SE Ranking data is that optimizing for AI visibility across a single platform is becoming riskier. ChatGPT still sends the most traffic, but the distribution is shifting. Brands that built their AI visibility strategy entirely around ChatGPT citations could find that a growing share of AI-driven discovery is happening through Gemini and Google’s AI search interfaces instead.
The Writesonic study covered in a recent NO-BS blog post showed that ChatGPT’s default model (GPT-5.3) and premium model (GPT-5.4) cite almost entirely different sources, with only 7% overlap. The SE Ranking data adds another dimension: even if a brand is well-cited on ChatGPT, the traffic from that platform may be declining while Gemini traffic grows.
For link building and digital PR strategy, the data reinforces the value of building authority broadly rather than optimizing for any single AI platform. Backlinks from authoritative sites, brand mentions across trusted third-party publishers, and strong review platform profiles are signals that all AI systems draw from when deciding which brands to surface. The sites that appear in ChatGPT citations, Gemini recommendations, and Perplexity answers tend to share the same underlying authority profile: strong domain authority, relevant topical coverage, and a consistent presence across the sources each platform trusts.
The brands best positioned for the shifting AI traffic landscape aren’t the ones that optimized for one platform. They’re the ones that built a foundation strong enough that any AI system, regardless of which one is growing fastest in a given quarter, has reason to recommend them.
SE Ranking study methodology: 101,574 websites across 250 geographic markets, January 2025 through January 2026. Platforms tracked include ChatGPT, Perplexity, Gemini, Copilot, Claude, DeepSeek, Grok, Mistral, Qwen, iAsk.AI, Venice.ai, and WRTN.ai.