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Gemma 2B - 10M Context

Gemma 2B with recurrent local attention with context length of up to 10M. Our implemenation uses <32GB of memory!

Graphic of our implementation context


  • 10M sequence length on Gemma 2B.
  • Runs on less than 32GB of memory.
  • Native inference optimized for cuda.
  • Recurrent local attention for O(N) memory.

Quick Start

Note: This is a very early checkpoint of the model. Only 200 steps. We plan on training for a lot more tokens!

Install the model from huggingface - Huggingface Model.


Change the inference code to the specific prompt you desire.

model_path = "./models/gemma-2b-10m"
tokenizer = AutoTokenizer.from_pretrained(model_path)
model = GemmaForCausalLM.from_pretrained(

prompt_text = "Summarize this harry potter book..."

with torch.no_grad():
    generated_text = generate(
        model, tokenizer, prompt_text, max_length=512, temperature=0.8


How does this work?

The largest bottleneck (in terms of memory) for LLMs is the KV cache. It grows quadratically in vanilla multi-head attention, thus limiting the size of your sequence length.

Our approach splits the attention in local attention blocks as outlined by InfiniAttention. We take those local attention blocks and apply recurrance to the local attention blocks for the final result of 10M context global atention.

A lot of the inspiration for our ideas comes from the Transformer-XL paper.


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