What is the context window of Granite 4.1 3B Base?

Granite 4.1 3B Base has a context window of 512K tokens.

When was Granite 4.1 3B Base released?

Granite 4.1 3B Base was released on 2026-04-29.

Granite 4.1 3B Base

Name: Granite 4.1 3B Base
Author: IBM Research

granite-4.1-3b-base

Open Source

About

IBM Granite 4.1 3B Base is the pre-training checkpoint for Granite 4.1 3B with extended 512K token context. Long-context extension applied in the final training phase. Dense decoder-only transformer architecture. Apache 2.0.

Granite 4.1 3B Base has a 512K-token context window.

Capabilities

VisionMultimodalReasoningFunction CallingTool UseStructured OutputsCode Execution

Rankings

Best Open Source LLMs Best Small Language Models (SLMs)Cheapest LLM APIs Best LLM APIs Best Free LLMs Best LLMs for Writing Best LLMs for Marketing

Specifications

FamilyGranite 4.1

Released2026-04-29

Parameters3B

Context512K

ArchitectureDense decoder-only transformer with GQA, RoPE, SwiGLU, RMSNorm

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IBM Research

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