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Gemini 3.1 Pro

Google · released 19 Feb 2026 · proprietary API

Frontier long-context multimodal reasoning; largest practical context in class.

Context window

1M

1,000,000 tokens

Input price

$2

per 1M tokens

Output price

$12

per 1M tokens

Blended

$4.50

3:1 in:out mix

Weights

Proprietary

API only

Released

19 Feb 2026

Google

Long-context / tier pricing — >200K billed $4/$18 (long-context tier). Listed prices are the base rate for prompts up to ~200K tokens.

Where it ranks

Of 40 models tracked.

Cost to run

#28(tied)

of 40

Input price

#22(tied)

of 40

Context window

#9(tied)

of 40

See the full Frontier Index →

Compare with

The nearest models by blended cost to run.

Put it to work

Specs from BitByteCore's hand-verified Frontier Ledger (v2026-09-26), this row verified 3 Sep 2026 against Google's official pricing ↗. Model pricing moves fast, so confirm with Google before you rely on a figure.