Granite-4.0-Micro-Base

Model Summary: Granite-4.0-Micro-Base is a decoder-only, long-context language model designed for a wide range of text-to-text generation tasks. It also supports Fill-in-the-Middle (FIM) code completion through the use of specialized prefix and suffix tokens. The model is trained from scratch on approximately 15 trillion tokens following a four-stage training strategy: 10 trillion tokens in the first stage, 2 trillion in the second, another 2 trillion in the third, and 0.5 trillion in the final stage.

Developers: Granite Team, IBM
HF Collection: Granite 4.0 Language Models HF Collection
GitHub Repository: ibm-granite/granite-4.0-language-models
Website: Granite Docs
Release Date: October 2nd, 2025
License: Apache 2.0

Supported Languages: English, German, Spanish, French, Japanese, Portuguese, Arabic, Czech, Italian, Korean, Dutch, and Chinese. Users may finetune Granite 4.0 models for languages beyond these languages.

Intended Use: Prominent use cases of LLMs in text-to-text generation include summarization, text classification, extraction, question-answering, code-completion (including FIM), and long-context generation tasks. All Granite Base models are able to handle these tasks as they were trained on a large amount of data from various domains. Moreover, they can serve as baseline to create specialized models for specific application scenarios.

Generation: This is a simple example of how to use Granite-4.0-Micro-Base model.

Install the following libraries:

Shell

pip install torch torchvision torchaudio
pip install accelerate
pip install transformers

Then, copy the code snippet below to run the example.

Python

from transformers import AutoModelForCausalLM, AutoTokenizer
device = "cuda"

model_path = "ibm-granite/granite-4.0-h-micro-base"

tokenizer = AutoTokenizer.from_pretrained(model_path)
# drop device_map if running on CPU
model = AutoModelForCausalLM.from_pretrained(model_path, device_map=device)
model.eval()
# change input text as desired
input_text = "The capital of France is"
# tokenize the text
input_tokens = tokenizer(input_text, return_tensors="pt").to(device)
# generate output tokens
output = model.generate(**input_tokens, max_length=10)
# decode output tokens into text
output = tokenizer.batch_decode(output)
# print output
print(output[0])

Expected output:

Shell

The capital of France is Paris.

Evaluation Results:

Benchmarks	Metric	Micro Dense	H Micro Dense	H Tiny MoE	H Small MoE
General Tasks
MMLU	5-shot	66.47	67.43	68.90	75.85
MMLU-Pro	5-shot,CoT	37.16	34.03	35.47	48.94
BBH	3-shot, CoT	63.84	57.65	59.67	75.84
AGI EVAL	3-shot	54.32	54.59	53.69	62.05
DROP	5-shot	66.04	67.44	64.92	74.69
Math Tasks
GSM8K	8-shot	72.93	63.76	72.55	82.11
Minerva Math	4-shot	38	39.7	40.34	46.28
Code Tasks
HumanEval	pass@1 [StarCoder Prompt]	76.19	73.72	77.59	83.66
HumanEval	pass@1	59.76	70.73	71.34	76.22
HumanEval+	pass@1	54.27	67.07	64.02	69.51
MBPP	pass@1	81.48	74.87	81.48	83.07
MBPP+	pass@1	68.25	63.23	68.78	70.37
Multilingual Tasks
MMMLU	5-shot	56.59	58.5	62.77	71.18
INCLUDE	5-shot	51.77	52.16	53.78	66.04
MGSM	8-shot	58.48	47.04	54.64	65.2

**Multilingual Benchmarks and thr included languages:**
Benchmarks	# Langs	Languages
MMMLU	11	ar, de, en, es, fr, ja, ko, pt, zh, bn, hi
INCLUDE	14	hi, bn, ta, te, ar, de, es, fr, it, ja, ko, nl, pt, zh
MGSM	5	en, es, fr, ja, zh

Model Architecture:

Granite-4.0-Micro-Base is based on a decoder-only dense transformer architecture. Core components of this architecture are: GQA, RoPE, MLP with SwiGLU, RMSNorm, and shared input/output embeddings.

Model	Micro Dense	H Micro Dense	H Tiny MoE	H Small MoE
Embedding size	2560	2048	1536	4096
Number of layers	40 attention	4 attention / 36 Mamba2	4 attention / 36 Mamba2	4 attention / 36 Mamba2
Attention head size	64	64	128	128
Number of attention heads	40	32	12	32
Number of KV heads	8	8	4	8
Mamba2 state size	-	128	128	128
Number of Mamba2 heads	-	64	48	128
MLP / Shared expert hidden size	8192	8192	1024	1536
Num. Experts	-	-	64	72
Num. active Experts	-	-	6	10
Expert hidden size	-	-	512	768
MLP activation	SwiGLU	SwiGLU	SwiGLU	SwiGLU
Sequence length	128K	128K	128K	128K
Position embedding	RoPE	NoPE	NoPE	NoPE
# Parameters	3B	3B	7B	32B
# Active parameters	3B	3B	1B	9B

Training Data: This model is trained on a mix of open source and proprietary data following a four-stage training strategy.

Stage	Characteristics	Micro Dense	H Micro Dense	H Tiny MoE	H Small MoE
I	General mixture of training data, warmup, and power scheduler for learning rate.	10	10	15	15
II	General mixture of training data with higher percentages of code and math with power scheduler for learning rate.	2	5	5	5
III	High quality training data, exponential decay of learning rate.	2	2	2	2
IV	High quality training data, linear decay to zero for learning rate.	0.5	0.5	0.5	0.5

Infrastructure: We trained the Granite 4.0 Language Models utilizing an NVIDIA GB200 NVL72 cluster hosted in CoreWeave. Intra-rack communication occurs via the 72-GPU NVLink domain, and a non-blocking, full Fat-Tree NDR 400 Gb/s InfiniBand network provides inter-rack communication. This cluster provides a scalable and efficient infrastructure for training our models over thousands of GPUs.

Ethical Considerations and Limitations: The use of Large Language Models involves risks and ethical considerations people must be aware of, including but not limited to: bias and fairness, misinformation, and autonomous decision-making. Granite-4.0-Micro-Base model is not the exception in this regard. Even though this model is suited for multiple generative AI tasks, it has not undergone any safety alignment, there it may produce problematic outputs. Additionally, it remains uncertain whether smaller models might exhibit increased susceptibility to hallucination in generation scenarios by copying text verbatim from the training dataset due to their reduced sizes and memorization capacities. This aspect is currently an active area of research, and we anticipate more rigorous exploration, comprehension, and mitigations in this domain. Regarding ethics, a latent risk associated with all Large Language Models is their malicious utilization. We urge the community to use Granite-4.0-Micro-Base model with ethical intentions and in a responsible way.

Resources

⭐️ Learn about the latest updates with Granite: https://www.ibm.com/granite
📄 Get started with tutorials, best practices, and prompt engineering advice: https://www.ibm.com/granite/docs/
💡 Learn about the latest Granite learning resources: https://github.com/ibm-granite-community/