Gemini 4 Argon

Available

A Google model with a 1M-token context window, image input and tool calling. On the Gemini API since October 13, 2026.

Access details: Gemini API

The model ID to use in API requests.

gemini-4-argon

Updated Oct 20, 2026

Sources & notes

Capabilities & limits

Context window: 1M
Maximum output: 64K
Image input: Supported
Tool calling: Supported
Structured output: Supported

Pricing

USD / 1M tokens

Input: $2.00
Output: $10.00

Standard rates per million tokens. Discounts and long-context rates, where offered, are on Google's pricing page.

Full rate card 5 rates

All prices in USD.

Standard input

$2.00 per 1M tokens

launch rate through November 30, 2026

Standard output (including thinking)

$10.00 per 1M tokens

launch rate through November 30, 2026

Context caching

$0.10 per 1M tokens

implicit caching only
launch rate through November 30, 2026

Batch input

$1.00 per 1M tokens

batch
launch rate through November 30, 2026

Batch output

$5.00 per 1M tokens

batch
launch rate through November 30, 2026

From December 1, 2026: $4.00 input, $20.00 output and $0.20 cache reads per 1M tokens (batch and flex $2.00/$10.00, priority $7.20/$36.00). Flex matches batch; priority is $3.60/$18.00 at launch. Explicit caching is not supported. Not available on the free tier.

Price history

Oct 13, 2026

Input $2.00 per million tokens

Dec 1, 2026

Input $4.00 per million tokens

Oct 13, 2026

Output $10.00 per million tokens

Dec 1, 2026

Output $20.00 per million tokens

Technical details

Parameters: Not published
Active parameters: Not published
Architecture: Sparse mixture-of-experts transformer
Training / knowledge cutoff: March 2026
Input modalities: Text, image, video, audio, PDF
Output modalities: Text

From Google

Official announcement ↗

How they describe it

our flagship reasoning model, built for complex software engineering

What they say is new

designed for those long-horizon workflows that require deep reasoning and structural precision

Release & lifecycle

First available: Oct 13, 2026
available: As of Oct 20, 2026