Most "AI race" coverage fixates on benchmark scores. But users actually vote with their feet across four surfaces: the web, mobile apps, browser extensions — and the model portfolio underneath. This piece puts OpenAI, Anthropic and Google on the same ruler, using AlphaMoat's May 2026 data across all four surfaces, to see who wears each of the three crowns: scale, growth, and matrix.
1. OpenAI: the scale king hits a high plateau
OpenAI remains the undisputed scale king: chatgpt.com alone draws 5.57B monthly visits — 1.9× Gemini and 5.8× Claude — while its app tops the global chart at 96.4M monthly downloads, still growing a healthy +11.7% MoM. But the web story has changed: the 14-month curve oscillates in a 5.1–6.2B band, peaked at 6.17B in October 2025, and hasn’t made a new high since; YoY growth is down to +8.2%. A plateau is not decline — it looks like the natural state of near-saturation, with the incremental battle shifting to mobile (still double-digit) and to API/enterprise surfaces that traffic charts can’t see.
The extension surface is the curious one: OpenAI’s official “ChatGPT search” extension sits at 4M installs, flat MoM, and only ranks #2 among ChatGPT-related extensions — behind third-party Sider (5M). In the browser-entry capillary market, the official presence is actually the weakest of the three crowns OpenAI could claim.
2. Anthropic: the growth king's 10× year
This is the steepest curve of the three: claude.ai went from 96M visits in April 2025 to 953M in May 2026 — +896% YoY, nearly 10×. The inflection is unmistakable: a gentle slope below 200M/month until February 2026, then three consecutive step-ups (614M → 824M → 953M) that vaulted Claude to #4 on the global web chart, with +15.7% MoM momentum still intact. Geography tells the same story: a 27.8% US share — highest of the trio — plus visible UK/France/Korea weight points to a developed-market, professional-heavy user base.
Two contrasts stand out across the four surfaces. First, mobile is Anthropic’s only weak flank: 27.4M downloads, -6.2% MoM — app productization and distribution clearly haven’t caught up with the web explosion. Second, the extension surface is the trio’s only “official #1”: Anthropic’s own Claude extension holds 8M installs, +14.3% MoM, ahead of every third party — it owns its own browser doorway. The model side is classic “few but sharp”: just 26 tracked models (1/5 of OpenAI, 1/17 of Google), yet 6 already shipped in 2026 — a visibly faster cadence.
3. Google: the matrix king with 438 models
Google’s curve sits between the other two: gemini.google.com grew from 409M a year ago to 2.90B, +609% YoY — a ramp almost identical in shape to Claude’s, but a year ahead and 3× the size. Behind it sits distribution leverage only Google has: the search box, Android pre-installs, Workspace bundling. Its geography is the most dispersed of the trio (Top-5 = just 36.8%, US only 13.7%), with Japan, Korea, India and Brazil jointly contributing 23% — Gemini is the most globalized product of the three.
Google’s real moat is the matrix: 438 tracked models (incl. DeepMind) — 3.4× OpenAI, 17× Anthropic — with 16 shipped in 2026, spanning open-weight Gemma to the three-tier Gemini 3.5 Flash line, covering the full price band from edge to flagship. The extension “absence” follows the same logic: Gemini doesn’t need an extension — it lives inside Chrome. And don’t overlook NotebookLM, which independently reached #7 on the global web chart (253M visits): Google is the only player with two products in the web Top-10.
4. Head-to-head: 59 : 31 : 10
Putting the three curves on one chart makes the structure obvious: ChatGPT is a high ceiling drawn flat; Gemini and Claude are two nearly identically-shaped ramps, with Gemini a year ahead and an order of magnitude bigger. If 2025’s theme was “ChatGPT alone at the top”, H1 2026 is the year of the challenger curve: within the trio’s 9.42B combined visits, ChatGPT’s share has fallen from roughly 91% a year ago to 59.1%, while Gemini + Claude now take 40.9%. The pie is growing — but the cut is changing.
5. Three takeaways
- Three crowns, three heads — unlikely to swap soon. OpenAI's scale rests on first-mover brand; Google's matrix on compute and distribution; Anthropic's growth on model reputation among professionals. Three different sources of advantage mean a long war, not winner-take-all.
- The challenger curve is 2026's defining shape. Gemini (+609%) and Claude (+896%) trace the same line: flat, then steep, inflecting right after model-generation upgrades met distribution. Claude entered its ramp a year behind Gemini — if it replays Gemini's path, the web standings get rewritten again by year-end.
- Each player's weakest surface telegraphs its next move. OpenAI's web plateau → push deeper into mobile and enterprise. Anthropic's app decline → mobile productization is its 2026 exam. Google is strong everywhere but first nowhere (except model count) → it's betting ecosystem density beats single-point breakouts.