Execution attempt

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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 · A47 · planned

Scores bits per byte of the transplant at time zero and arm B's five milestones on ten texts.

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 @ b4c55e6e7d26917e239ccbe2f11886c4d4a733a2

Reference checked 2026-09-14 13:12 UTC. Later commits, branches or plan changes do not retarget this attempt.

Command
bash scripts/06_score_checkpoint.sh bpb armB t0_fvt=ckpts/fvt_t0 ckpt_00100M=ckpts/armB/ckpt_00100M ckpt_00200M=ckpts/armB/ckpt_00200M ckpt_00300M=ckpts/armB/ckpt_00300M ckpt_00400M=ckpts/armB/ckpt_00400M ckpt_00500M=ckpts/armB/ckpt_00500M
Working directory
experiments/E05-control-arm
Configuration paths
None
Parameters
Ten texts, first 200 documents each, non-overlapping 2048-token windows, row-wise loss.
Environment
3.12.13; PyTorch MPS, bf16; Apple silicon, 128 GB unified memory
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.

Delivered events

  1. Registered

    #1

    Scores bits per byte of the transplant at time zero and arm B's five milestones on ten texts.

    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.

    • bpb_armB.jsonl · https://github.com/stw2/tokenizer-science-tax/blob/9a57aa40f4e774136f51b6730c33266d59094a45/experiments/E05-control-arm/results/bpb_armB.jsonl · public · sha256 0a0b52b97d30… · 7162 bytes · M168
    • bpb_armB.jsonl as originally written · Archived private repository, experiments/E5/results/bpb_armB.jsonl at commit 5389273; the public copy replaces absolute model paths with paths relative to the experiment folder · unavailable · sha256 2ae126425570… · 7474 bytes · M169

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

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