diff options
| author | YurenHao0426 <Blackhao0426@gmail.com> | 2026-07-29 20:42:34 -0500 |
|---|---|---|
| committer | YurenHao0426 <Blackhao0426@gmail.com> | 2026-07-29 20:42:34 -0500 |
| commit | 47ab7f9777852b5fd70e0dad90557057a3f42c13 (patch) | |
| tree | 2210b89046b1a4e8118212397eaef8c38ff450d4 | |
| parent | f8f778255c4327ac564e11d141439a1d9433e7a3 (diff) | |
Suspend positive scaling claims; state the negative result and the pre-registered protocol (user doctrine)
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn
| -rw-r--r-- | index.html | 35 |
1 files changed, 19 insertions, 16 deletions
@@ -252,8 +252,8 @@ <thead><tr><th>Model</th><th>Data</th><th>EP (val CE)</th><th>BP twin</th><th>Gap</th></tr></thead> <tbody> <tr><td>72M transformer LM</td><td>FineWeb-Edu, 1.4B tok</td><td>3.33</td><td>3.29</td><td>+4-5% ppl</td></tr> - <tr><td>135M transformer LM</td><td>FineWeb-Edu, 2.7B tok</td><td colspan="3">trained end-to-end, zero instability - events; scaling analysis below</td></tr> + <tr><td>135M transformer LM</td><td>FineWeb-Edu, 2.7B tok</td><td colspan="3">trains stably end to end; the frozen + 72M recipe does not transfer (gap grows to roughly 30% ppl). See the scaling note below.</td></tr> </tbody> </table> <p class="is-size-6 has-text-grey">Twin discipline: identical architecture, tokenizer, data order, @@ -276,16 +276,18 @@ <div class="container is-max-desktop"> <div class="columns is-centered"> <div class="column is-four-fifths"> - <h2 class="title is-3">The scaling science</h2> + <h2 class="title is-3">The scaling note</h2> <div class="content has-text-justified"> - <p>Scaling a physical learning rule surfaces phenomena backprop never meets. Between widths 512 and 768 - we identified a width-scaling loss in the EP gradient: localized to the top half of the network, - invisible to every per-step alignment metric, and traced to response components that finite nudge - displacement under-reaches. We built a screening instrument that measures this leak in 90 minutes per - candidate recipe, mapped its dose-response law (logarithmic across two decades of displacement - amplification), and demonstrated a pure estimator-side treatment that closes 97% of it: no change to - the model, its inference path, or the cost budget. The same instruments provide the go/no-go protocol - for each next rung of the ladder.</p> + <p>Scaling the frozen 72M recipe one width step (512 to 768) fails: the EP to BP gap grows from + 4-5% to roughly 30% perplexity. We treat this as the central result of the current phase and the + central research object. It has sharp structure: the loss is fully localized to the top half of the + network, is invisible to every per-step alignment metric, is untouched by estimator symmetrization, + precision, relaxation depth, and output-head interventions, and is removed completely by + substituting true gradients in the top half. A mechanism-identification campaign across four widths + is in progress, with a pre-registered transfer law and a blind holdout at the next width. Positive + scaling claims are suspended until the law predicts an unseen width with zero tuning.</p> + </div> + <div class="content" style="display:none"> </div> <h2 class="title is-3">Hardware line</h2> <div class="content"> @@ -301,11 +303,12 @@ </div> <h2 class="title is-3">Roadmap</h2> <div class="content has-text-justified"> - <p>Staged scaling with matched BP controls and hardware-relevant ablations at every rung: a 150M-600M - ladder (the gap is measured against a backprop twin at every rung), then 1B-3B; each stage - gated on the previous stage’s loss, alignment, and throughput numbers. In parallel: the - algorithm→regime map across the activity-difference family (contrastive / coupled-learning arms on - the same harness), and a bounded single-column hardware feasibility study.</p> + <p>Mechanism first: identify the width-scaling term across four measured widths, freeze a transfer + law with its thresholds and budgets, then validate blind at 270M with from-scratch runs and two + seeds. The scaling ladder resumes only on a zero-tuning hit at the holdout width. In parallel: the + algorithm-to-regime map across the activity-difference family, and a bounded single-column hardware + feasibility study.</p> + </div> </div> </div> </div> |
