Ring-mini-linear-2.0

Introduction

Today, we are officially open-sourcing Ring-mini-linear-2.0.

This model continues to employ a hybrid architecture that combines linear attention and standard attention mechanisms, striking a balance between performance and efficiency. Inheriting the efficient MoE (Mixture-of-Experts) design from the Ling 2.0 series, and through architectural optimizations such as a 1/32 expert activation ratio and MTP layers, Ring-mini-linear achieves the performance of an ~8B dense model while activating only 1.6B of its 16.4B total parameters. This model was converted from Ling-mini-base-2.0, continually trained on an additional 600B tokens. In terms of performance, the hybrid linear model is comparable in overall performance to standard attention models of a similar size (e.g., Ring-mini-2) and surpasses other open-source MoE and Dense models of the same class on several challenging benchmarks. Additionally, we support a 512k long context window, achieved by extrapolating the window 4x using YaRN. This provides superior speed, especially on tasks involving long inputs and outputs.

Figure 1: Hybrid Linear Model Architecture

Evaluation

To better demonstrate our model's reasoning capabilities, we compared it with three other models—Ring-mini-2.0, Qwen3-8B-thinking, and GPT-OSS-20B-Medium—on 5 challenging reasoning benchmarks across mathematics, code, and science. We observe that the hybrid-linear architecture achieves performance comparable to that of softmax attention models.

Figure 2: Model Performance Comparison

Linear Attention, Highly Sparse, High-Speed Generation

Thanks to its hybrid attention mechanism and highly sparse MoE architecture, Ring-mini-linear-2.0 achieves near-linear time complexity and constant space complexity, resulting in outstanding inference efficiency. To fully demonstrate this advantage, we conducted a comparison between our model and top-tier competitors of similar size or performance.The results clearly demonstrate the advantage of our model in inference efficiency.

Figure 3: Ring-mini-linear-2.0 prefill throughput

Figure 4: Ring-mini-linear-2.0 decode throughput

Quickstart

Requirements

pip install flash-linear-attention==0.3.2
pip install transformers==4.56.1

🤗 Hugging Face Transformers

from transformers import AutoModelForCausalLM, AutoTokenizer

model_name = "inclusionAI/Ring-mini-linear-2.0"

model = AutoModelForCausalLM.from_pretrained(
    model_name,
    dtype="auto",
    device_map="auto",
    trust_remote_code=True,
)
tokenizer = AutoTokenizer.from_pretrained(model_name)


prompts = [
    "Give me a short introduction to large language models."
]
input_texts = []
for prompt in prompts:
    messages = [
        {"role": "user", "content": prompt}
    ]
    text = tokenizer.apply_chat_template(
        messages,
        tokenize=False,
        add_generation_prompt=True
    )
    input_texts.append(text)

print(input_texts)

model_inputs = tokenizer(input_texts, return_tensors="pt", return_token_type_ids=False, padding=True, padding_side='left').to(model.device)

generated_ids = model.generate(
    **model_inputs,
    max_new_tokens=8192,
    do_sample=False,
)
generated_ids = [
    output_ids[len(input_ids):] for input_ids, output_ids in zip(model_inputs.input_ids, generated_ids)
]

responses = tokenizer.batch_decode(generated_ids, skip_special_tokens=True)

print("*" * 30)
print(responses)
print("*" * 30)

🚀 SGLang

Environment Preparation

We have submitted our PR to SGLang official release and it will be merged later, for now we can prepare the environment following steps, firstly install the community version SGLang and required packages:

pip install sglang==0.5.2 sgl-kernel==0.3.9.post2 vllm==0.10.2 torch==2.8.0 torchvision==0.23.0 torchao

Then you should install our sglang wheel package:

pip install https://raw.githubusercontent.com/inclusionAI/Ring-V2/refs/heads/main/hybrid_linear/whls/sglang-0.5.2-py3-none-any.whl --no-deps --force-reinstall

Run Inference

BF16 and FP8 models are supported by SGLang now, it depends on the dtype of the model in ${MODEL_PATH}. They both share the same command in the following:

Start server:

python -m sglang.launch_server \
    --model-path <model_path> \
    --trust-remote-code \
    --tp-size 1 \
    --disable-radix-cache \
    --json-model-override-args "{\"linear_backend\": \"seg_la\"}"

Client:

curl -s http://localhost:${PORT}/v1/chat/completions \
  -H "Content-Type: application/json" \
  -d '{"model": "auto", "temperature": 0.6, "messages": [{"role": "user", "content": "Give me a short introduction to large language models."}]}'

More usage can be found here

🚀 vLLM

Environment Preparation

Since the Pull Request (PR) has not been submitted to the vLLM community at this stage, please prepare the environment by following the steps below:

pip install torch==2.7.0 torchvision==0.22.0

Then you should install our vLLM wheel package:

pip install https://media.githubusercontent.com/media/inclusionAI/Ring-V2/refs/heads/main/hybrid_linear/whls/vllm-0.8.5%2Bcuda12_8_gcc10_2_1-cp310-cp310-linux_x86_64.whl --no-deps --force-reinstall

Offline Inference

from transformers import AutoTokenizer
from vllm import LLM, SamplingParams

tokenizer = AutoTokenizer.from_pretrained("inclusionAI/Ring-mini-linear-2.0")

sampling_params = SamplingParams(temperature=0.6, top_p=1.0, max_tokens=8192)

llm = LLM(model="inclusionAI/Ring-mini-linear-2.0", dtype='bfloat16', enable_prefix_caching=False)
prompt = "Give me a short introduction to large language models."
messages = [
    {"role": "user", "content": prompt}
]

text = tokenizer.apply_chat_template(
    messages,
    tokenize=False,
    add_generation_prompt=True
)
outputs = llm.generate([text], sampling_params)

Online Inference

vllm serve inclusionAI/Ring-mini-linear-2.0 \
              --tensor-parallel-size 1 \
              --gpu-memory-utilization 0.90 \
              --no-enable-prefix-caching