Gemini 4 Argon was released by Google on October 13, 2026, as a flagship model in the Gemini Pro line.
Google's first Gemini 4 model replaces Gemini 3.1 Pro as its top model in the paid Gemini API, with a 1M-token window shared by input, thinking and output.
Compared with Gemini 3.1 Pro · the model it replaces
Answers nearly 9 in 10 questions about reasoning in the physical world
ERQA — embodied reasoning questions for robots and real scenes
87%
✦ Google gives no earlier Gemini score to compare
Scores 53 on a combined set of hard tests
Artificial Analysis Intelligence Index v4.3.2 — one score averaging 10 hard tests
53
✦ High effort · no Gemini 3.1 Pro score on the same index version to compare
Launches at an introductory price for developers
API price — dollars per 1M input / output tokens
$2 / $10
✦ introductory price · Google's standard rate is $4 / $20
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Gemini 4 Argon is the current model in this line. The card shows how long it has been since the last release against the line's usual gap and its recent ones — the rhythm, not a date.
Latest: Gemini 4 Argon · Oct 13, 2026
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