Record: PhraseCache + OrderAdaptive N-gram + RegimeTracker — val_bpb 0.1003 (3-seed mean)#880
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RoyiRa wants to merge 1 commit intoopenai:mainfrom
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Record: PhraseCache + OrderAdaptive N-gram + RegimeTracker — val_bpb 0.1003 (3-seed mean)#880RoyiRa wants to merge 1 commit intoopenai:mainfrom
RoyiRa wants to merge 1 commit intoopenai:mainfrom
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…0.1003 (3-seed mean) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Thanks for your submission! Unfortunately, it's disallowed due to the use of hashed n-gram caches, which do not renormalize correctly / correctly reweight the LM's token distribution, look ahead to the target token to mix probabilities and therefore leak eval tokens. Please refer to the long discussion about this under the issues tab for more details, and please submit more runs in the future! |
newjordan
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Mar 28, 2026
Phrase cache (PR openai#880 / PR openai#900 — proven +0.1 BPB, legal): - Variable-length suffix matching at 48/36/28/20/16 token probe lengths - One ctx+full count table pair per probe length (4M buckets each) - 48-prime XOR hash — unique prime per context position up to length 48 - Dirichlet smoothing: p=(min(fc,cc)+c*neural)/(ctx+c), c=2.0 - Applied inline after n-gram mixing, before NLL conversion - Score-first: tables updated with chunk tokens AFTER all scoring done RegimeTracker (PR openai#880): - Tracks match rate + token diversity over rolling 4096-token window - Adapts effective phrase concentration: repetitive/boilerplate content → lower c (more cache trust); novel prose → higher c (more neural trust) - Multiplier range [0.7, 1.5], effective_c = base_c / mult Config improvements: - WARMDOWN_ITERS=2000 (confirmed best from A/B sweep) - NGRAM_CHUNK_TOKENS=65536 (PR openai#850, 15x more cache refreshes vs 1M) - MATRIX_LR=0.03 (PR openai#859) ARTIFACT_NGRAM=0 remains disabled (legally gray). Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
sofiabod
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Each additional probe length adds ~0.005 BPB. probe[28] → -0.007, probe[36] → -0.005. Testing if probe[48] captures even longer verbatim patterns.
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Summary
Results (8xH100 80GB SXM)
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