BgGPT-Gemma-3-27B-IT
BgGPT 3.0 is a series of Bulgarian-adapted LLMs based on Gemma 3, developed by INSAIT. Available in 4B, 12B and 27B sizes.
Blog post: BgGPT-3 Release
Key improvements over BgGPT 2.0
- Vision-language understanding — The models understand both text and images within the same context.
- Instruction-following — Trained on a broader range of tasks, multi-turn conversations, complex instructions, and system prompts.
- Longer context — Effective context of 131k tokens for longer conversations and complex instructions.
- Updated knowledge cut-off — Pretraining data up to May 2025, instruction fine-tuning up to October 2025.
Figure 1: Performance on Generative Tasks (TriviaQA, GSM8k, IFEval, BigBenchHard)
Usage
Transformers
from transformers import AutoProcessor, Gemma3ForConditionalGeneration
import torch
model_id = "INSAIT-Institute/BgGPT-Gemma-3-27B-IT"
processor = AutoProcessor.from_pretrained(model_id)
model = Gemma3ForConditionalGeneration.from_pretrained(
model_id, device_map="auto"
).eval()
messages = [
{
"role": "user",
"content": [{"type": "text", "text": "Кога е основан Софийският университет?"}],
},
]
inputs = processor.apply_chat_template(
messages, add_generation_prompt=True, tokenize=True,
return_dict=True, return_tensors="pt"
).to(model.device, dtype=torch.bfloat16)
input_len = inputs["input_ids"].shape[-1]
with torch.inference_mode():
generation = model.generate(**inputs, max_new_tokens=512, do_sample=True, temperature=0.2)
generation = generation[0][input_len:]
print(processor.decode(generation, skip_special_tokens=True))
With an image
messages = [
{
"role": "user",
"content": [
{"type": "image", "image": "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/bee.jpg"},
{"type": "text", "text": "Опиши какво виждаш на изображението."},
],
},
]
inputs = processor.apply_chat_template(
messages, add_generation_prompt=True, tokenize=True,
return_dict=True, return_tensors="pt"
).to(model.device, dtype=torch.bfloat16)
input_len = inputs["input_ids"].shape[-1]
with torch.inference_mode():
generation = model.generate(**inputs, max_new_tokens=512, do_sample=True, temperature=0.2)
generation = generation[0][input_len:]
print(processor.decode(generation, skip_special_tokens=True))
vLLM
from vllm import LLM, SamplingParams
llm = LLM(model="INSAIT-Institute/BgGPT-Gemma-3-27B-IT")
params = SamplingParams(max_tokens=512, temperature=0.2)
messages = [
{
"role": "user",
"content": [{"type": "text", "text": "Кога е основан Софийският университет?"}],
},
]
outputs = llm.chat(messages, sampling_params=params)
print(outputs[0].outputs[0].text)
Serving with the OpenAI-compatible API:
vllm serve INSAIT-Institute/BgGPT-Gemma-3-27B-IT
vLLM with FP8 dynamic quantization
Load the model in FP8 at runtime for ~2x memory reduction with minimal quality loss — no separate quantized checkpoint needed:
from vllm import LLM, SamplingParams
llm = LLM(
model="INSAIT-Institute/BgGPT-Gemma-3-27B-IT",
quantization="fp8",
)
params = SamplingParams(max_tokens=512, temperature=0.2)
messages = [
{
"role": "user",
"content": [{"type": "text", "text": "Кога е основан Софийският университет?"}],
},
]
outputs = llm.chat(messages, sampling_params=params)
print(outputs[0].outputs[0].text)
vllm serve INSAIT-Institute/BgGPT-Gemma-3-27B-IT --quantization fp8
Requires a GPU with compute capability >= 8.9 (H100, H200, RTX 4090).
License
BgGPT-Gemma-3-27B-IT is distributed under the Gemma Terms of Use.