Gemini 3.1 Flash-Lite

Google · Gemini Flash line · lightweight

Released March 3, 2026Replaced by Gemini 3.5 Flash

Gemini 3.1 Flash-Lite was released by Google on March 3, 2026, as a lightweight model in the Gemini Flash line.

Release 9 of 14 in the Gemini Flash line.
Came 76 days after Gemini 3 Flash, released Dec 17, 2025.
Replaced by Gemini 3.5 Flash on May 19, 2026, 77 days later.
These days the line ships a new model about every 63 days.

What changed

Built for high-volume work, Gemini 3.1 Flash-Lite scores 86.9% on GPQA Diamond versus 66.7% for Gemini 2.5 Flash-Lite, but its price per 1M tokens rises from $0.10 / $0.40 to $0.25 / $1.50.

Compared with Gemini 2.5 Flash-Lite · the model it replaces

Answers almost 9 in 10 hard science questions correctly

GPQA Diamond — hard graduate-level science questions, answered without tools

86.9%

▲ up from 66.7% · +20.2 points · 3.1 Flash-Lite at high thinking, 2.5 Flash-Lite at dynamic thinking

Costs more per token than Gemini 2.5 Flash-Lite

Price per 1M tokens — what developers pay, input / output

$0.25 / $1.50

was $0.10 / $0.40 · input up 150%, output up 275%

Sources: Google · Google DeepMind

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Where the Gemini Flash line stands

Gemini 3.8 Flash 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.