we taught a small model to predict how simulated fluid would move eight steps into the future. it learned from examples, then succeeded on examples withheld from training. two things mattered: - its memory helped. the version with an internal memory produced about 41β45% less prediction error than the comparison model using recent observations. - the learning was repeatable. restarting training reproduced every recorded update and saved checkpoint exactly. resuming halfway through also produced the same ending. that gives us working evidence that bf16 gpu training can learn and remain exactly repeatable on this 3090 ti and software setup.
There are still some interesting improvements in these models: - Compatible with non-CUDA devices - Vocabulary increased to 16K tokens - Context length increased to 16K tokens
For now, there won't be any more Pebble releases for a while. We're going to take some time to experiment with other approaches and hopefully make the next generation a monumental leap over this one.
An integer execution method for reproducible inference from publicly available model weights, demonstrated on Qwen3-4B. Journaled bytes and all.
Keep an eye out for the gpt-oss-120B on the 24gb GPU- deterministically. We make AI models do the same things every time!βοΈπ i64systems/Qwen3-4B-openbob-i8
Weβre excited to release Pebble-25M and Pebble-25M-Chat!
Both models use our 3:1 Mamba2/Transformer hybrid architecture and were pretrained on 25B tokens. Pebble-25M-Chat was then further fine-tuned on an additional 250M tokens from smol-smoltalk, following the same approach used for the Pebble-10M models.
remat is no longer a one-model claim!!proved it on Qwen3-30B-A3B, K=32 of 128 experts resident, output task byte-identical to the full reference, zero bytes different *in bf16*π₯°π₯° GPU comes nextπ