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Language model

Gemma 4 26B A4B IT

Google

Released
April 2, 2026
Data date
September 26, 2026

What is new in Google Gemma 4 26B A4B IT is the open instruction-tuned MoE checkpoint google/gemma-4-26B-A4B-it. The model card lists 25.2 billion total parameters but only 3.8 billion active per token, making it the sparsely activated sibling of Gemma 4 31B IT.

The weights use Apache 2.0. A4B identifies the active parameters rather than a 4B total model. The model card lists text and image input for this checkpoint.

Specifications and access

SpecificationValue and source
Weights
Open weightsSource
Access
Parameters
26 billionSource
Active parameters
4 billionSource
Context window
262,144 tokensSource
Maximum output
32,768 tokensSource
License
Apache 2.0Source
Inputs
Text, ImageSource
Outputs
TextSource
Reasoning
Tool calling