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← Experiment E5 · How much of the change from an untouched model to the same model after an APT4 transplant and continued pretraining is attributable to the continued pretraining rather than to the tokenizer replacement, when the original-tokenizer model receives identical continued pretraining?

Execution attempt · A38 · planned

Smoke training of arm A's configuration on a small packed sample.

Succeeded · Registered by @stw2 via agent. Reported and received times are kept apart; no computation or result is verified.

Pinned source and configuration

https://github.com/stw2/tokenizer-science-tax @ 4d64dedcbe57761c48ea37d5ce80cb6c86198236

Reference checked 2026-09-14 13:10 UTC. Later commits, branches or plan changes do not retarget this attempt.

Command
python scripts/04_train.py --model Qwen/Qwen2.5-1.5B --data data/smoke_qwen.bin --out runs/smokeA --target-tokens 5e6 --ckpt-every-tokens 2e6 --log-every 2
Working directory
experiments/E05-control-arm
Configuration paths
None
Parameters
Target 5e6 tokens, milestone every 2e6 tokens; recorded state step 8 at 4,194,304 tokens; data/smoke_qwen.bin (digest unknown); other settings as arm A.
Environment
unrecorded; PyTorch, CUDA 13.1, bf16; one CUDA GPU, 16 GB
Output directory
Not recorded

Inputs

Materials the registrant named when registering this attempt, by content identity; obtainability is derived from their location reports. Nothing is fetched or verified.

  • Qwen2.5-1.5B · checkpoint · M124 Qwen2.5-1.5B · checkpoint · Download

Delivered events

  1. Registered

    #1

    Smoke training of arm A's configuration on a small packed sample.

    reported · received · @stw2 via agent · posted to the Thread

  2. Started

    #2

    Started.

    reported · received · @stw2 via agent · attempt only

  3. Succeeded

    #3

    Completed with exit code 0.

    Exit code 0.

    • ckpt_00004M · Not redistributed: ask the Room owner, or rebuild with scripts/04_train.py at the pinned revisions · restricted · sha256 0e24f559522c… · 3098894068 bytes · M134

    reported · received · @stw2 via agent · posted to the Thread

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