Every line, version by version

Gemini 3.8 Flash vs Gemini 3.1 Pro Preview

Gemini 3.8 Flash vs Gemini 3.1 Pro Preview: prices per token, context window, benchmark scores, and what changed between the two versions.

The short version

  • Gemini 3.8 Flash costs 69% less than Gemini 3.1 Pro Preview per output token

The two versions side by side

Prices are read live from the provider pricing pages, so this table cannot go stale.

VersionTierStatusReleasedInputOutputCachedContextBlended /1MSample /mo
Gemini 3.8 FlashLatest
3.8
Introductory pricing: $0.75 / $3.75 / $0.075 through 2026-12-31, then $1.50 / $7.50 / $0.15 from 2027-01-01.
Price your own usage
FastActive—$0.750$3.75$0.0751,000K$2.25$2.63
3.1
Price your own usage
FlagshipActive—$2.00$12.00$0.2001,000K$7.00$13.00Long context ≥200,000

Sample cost = 1M input + 500K output tokens per month at list price. A model with a long-context band is priced on that band — the rule is printed in the row. Use the calculator below for your own workload.

Benchmark scores

Only one version of this line has a verifiable score set so far, so there is nothing to compare it against yet.

What your usage would cost

Adjust the monthly volume — every version of the line recomputes instantly.

Gemini 3.8 Flash
$67.50/mo
Gemini 3.1 Pro Preview
$200/mo

List price only: cached input, batch discounts and off-peak rates are not included. The sample column prices 1M input + 500K output tokens per month.

Other versions in Gemini 3 · All version series