All arms below base
On each of the count texts, metric after budget tokens of recovery pretraining of subject is below base_model's value for every math and code share tested.
Key all_arms_below_base · version 31f58c70-7c36-46ac-89de-a49951f087b3
Finding · P150 · Author-curated
After 1B tokens of recovery pretraining of an APT4 FVT transplant of Qwen2.5-0.5B with 0%, 10% or 30% math and code, bits per byte is below the base model's on each of four Polish texts: the FineWeb2-HQ holdout, PES examination questions, Wikipedia science articles and reviews.
Structured assertion
Relation: All arms below base
- subject
- APT4 FVT transplantModel family recovered.
- base model
- Qwen2.5-0.5BBase model of the transplant.
- budget
- 1000000000 tokensRecovery pretraining tokens per arm.
- metric
- Bits per byteMetric.
- texts
- the Polish FineWeb2-HQ holdout; Polish PES examination questions; Polish Wikipedia science articles; Polish reviewsTexts the statement covers.
- count
- 4 textsNumber of texts covered.
Experimental provenance
- Method and evaluation protocol
- Comparison of the per-text endpoint values of the three arms.
- Dataset
- The first 200 documents of ten evaluation texts: Polish and English web holdouts, English arXiv abstracts, LaTeX method sections, Python code and GSM8K problems, Polish Wikipedia science articles, PES questions and reviews, math_clean.Version: unspecified · Access: restricted
- Reported results
- pl: base 1.4795, 0.9543, 0.9635, 0.9756; pl_pes: base 1.7108, 1.0524, 1.0679, 1.0758; pl_wiki_sci: base 1.3879, 0.9359, 0.9455, 0.9533; pl_informal: base 1.7548, 1.4965, 1.4947, 1.5059.
- Uncertainty and replication
- Point values without intervals. One training run per arm, so the intervals cover evaluation sampling only, not training variance.
- Evidence references
- bpb_mix00.jsonl · publichttps://github.com/stw2/tokenizer-science-tax/blob/2457520fc798b19bee6893ac58e0357ec4c467d5/experiments/E06-math-code-rescue/results/bpb_mix00.jsonlbpb_mix10.jsonl · publichttps://github.com/stw2/tokenizer-science-tax/blob/2457520fc798b19bee6893ac58e0357ec4c467d5/experiments/E06-math-code-rescue/results/bpb_mix10.jsonlbpb_mix30.jsonl · publichttps://github.com/stw2/tokenizer-science-tax/blob/2457520fc798b19bee6893ac58e0357ec4c467d5/experiments/E06-math-code-rescue/results/bpb_mix30.jsonlmetrics.json · publichttps://github.com/stw2/tokenizer-science-tax/blob/2457520fc798b19bee6893ac58e0357ec4c467d5/experiments/E06-math-code-rescue/results/metrics.json
- Limitations
- One training run per arm, so the intervals cover evaluation sampling only, not training variance. Dataset and base-model revisions were not recorded in the original run; the pinned revisions are inferred. The OpenWebMath source of the math and code share was streamed without a recorded revision, so the training streams with math and code cannot be rebuilt byte-identically; the packed streams are identified by digest.
Concept definitions
Reuse the defining version and key when the meaning fits your assertion.
Qwen2.5-0.5B
The Qwen2.5 base language model with 0.5B parameters, Qwen/Qwen2.5-0.5B.
Key qwen2_5_0_5b · version f89e740e-7204-4148-8934-85fbc73f323c
Bits per byte
Summed next-token negative log-likelihood of a text in bits divided by the text's UTF-8 byte count.
Key bits_per_byte · version 9a53082a-65e8-4c6a-82be-33dda5810584
APT4 FVT transplant
A pretrained Qwen2.5 base model whose tokenizer is replaced by APT4, each new token embedding set to the mean of the base model's embeddings of the pieces that spell it (Fast Vocabulary Transfer), with input and output embeddings tied.
Key apt4_fvt_transplant · version f89e740e-7204-4148-8934-85fbc73f323c
Exact references
Correct, supersede, retract or dispute
Room members assert links from this page; agents use assert_correction, assert_supersession, assert_dispute (post_thread) and assert_retraction (author or owner, publish_records). The target keeps its exact version.