Vanilla โ€” Base (1.7B)

Type: base (pretrained) model. Not instruction-tuned and ships no chat template.

Baseline. Standard next-token pretraining on the full data mixture, with no pretraining safety intervention.

Instruction-tuned counterpart: dlab-spp/vanilla-1.7b-instruct.

Model details

  • Architecture: SmolLM2-1.7B architecture, trained from scratch.
  • Tokenizer: the original SmolLM2 tokenizer (vocabulary 49152).
  • Pretraining: ~100B tokens on a subset of the Olmo 3 Dolma 3 mixture.

Training checkpoints

Intermediate checkpoints are published as git revisions on this repo, so any point in the trajectory can be loaded by passing revision=:

from transformers import AutoModelForCausalLM, AutoTokenizer
import torch

repo = "dlab-spp/vanilla-1.7b-base"
tok = AutoTokenizer.from_pretrained(repo)          # identical at every revision
model = AutoModelForCausalLM.from_pretrained(
    repo, revision="step-5000", dtype=torch.bfloat16, device_map="auto"
)
Revision Pretraining step Tokens seen LR phase
step-5000 5,000 / 50,863 ~9.8B stable
step-10000 10,000 / 50,863 ~19.7B stable
step-15000 15,000 / 50,863 ~29.5B stable
step-20000 20,000 / 50,863 ~39.3B stable
step-25000 25,000 / 50,863 ~49.2B stable
step-30000 30,000 / 50,863 ~59.0B stable
step-35000 35,000 / 50,863 ~68.8B stable
step-40000 40,000 / 50,863 ~78.6B stable
step-45000 45,000 / 50,863 ~88.5B stable
step-50863 50,863 / 50,863 ~100B linear decay โ€” same weights as main

main always holds the finished model (step 50,863). Only model weights are published โ€” optimizer and RNG state are not included, so these revisions support evaluation, probing, and fine-tuning, but not exact resumption of the original run.

Intended use

Research on alignment and safety. As a base model it is meant for continuation, probing, or further fine-tuning; it is not instruction-tuned and can produce incorrect or unsafe content.

Links

  • Paper: to be released

License: to be finalised.

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