f9_slp1_uni8k_d350m_plus_all_3x

d350m (318.4M parameters) on plus_all slice (520.4M words, 3 passes), trained on A100 40GB (Google Cloud, spot). Started 3 Oct 2026, ended 4 Oct 2026.

Hypothesis

F7's 350M model on the full plus_all slice (71.5M more leak-checked words) for three passes beats F7, also on the contamination-clean sets.

What we learned

Winner: ex-Gita 0.5547 (3.0% better than F7), clean_v1 0.5773 (2.8% better). Data and passes changed together, so it does not say which helped. Released as sansar-350m v0.2.0.

Scores

Bits per byte, lower is better; change against the parent run, F7.

ex-Gītā (headline)
0.5547
bits per byte
−3.0%
ex-Gītā, clean_v1
0.5773
bits per byte
−2.8%
Pooled, all five sets
0.5394
bits per byte
−3.1%
Validation split
0.5033
bits per byte
−1.4%
Bits per byte on each test set
Test setF9F7 (parent)Change
DCS gold (classical)0.56870.5757−1.2%
Bhagavad-gītā (memorisation)0.13670.1552−11.9%
Out of domain0.55420.573−3.3%
Prose0.54060.5577−3.1%
Vedic (Ṛgveda)0.68920.7052−2.3%

Curves

Training loss

Cross-entropy per token, by step. The first few percent of the run, far higher, run off the top; hover or the table has every value.

Held-out bits per byte

The validation split, evaluated during training, by step. Lower is better.

Throughput

Tokens per second, by step.

Model

Preset
d350m
Parameters
318,424,064
Outside embeddings
302,040,064
Layers · heads · width
24 · 16 · 1,024
Tokenizer
SLP1 unigram 8k

Muon + AdamW, rope, qk_norm, relu^2, untied head

Data

Slice
plus_all slice
Words
520,400,000
Training tokens
1,696,174,507
Passes
3 passes
Tokens seen
5,088,559,104

Compute

GPU
A100 40GB
Where
Google Cloud (spot)
Steps
103,527 / 103,527
GPU hours
20.53
Cost
$26.69
Spot restarts
0

Lineage

gcpa100spotd350m