Google's Gemini 4 Carbon Retakes the Top of the Leaderboard as Three Labs Ship in a Single Week
OpenAI, Google, and Moonshot all dropped frontier updates within days of each other, and Gemini 4 Carbon landed first on the Artificial Analysis Intelligence Index with the lowest hallucination rate of the pack.
The AI frontier reordered itself this week, and Google is the one sitting on top. Gemini 4 Carbon took first place in the overall Artificial Analysis Intelligence Index v5, pairing the highest intelligence score with the lowest hallucination rate of any model measured, according to @kimmonismus. For a company that spent much of the past two years playing catch-up on public perception, it is a notable return to pole position.
The release did not happen in a vacuum. As @zzaba_a catalogued, three laboratories staged what amounted to a coordinated barrage: OpenAI shipped GPT-6.1 Terra, Google shipped Gemini 4 Carbon, and Moonshot AI shipped Kimi K3.1 Pro — all in the same compressed window. When three frontier updates land in a single week, the competitive signal is less about any individual model and more about the cadence itself. The labs are now releasing on a rhythm that leaves little room for the field to settle.
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