cminst / realistic-bpe5-string-atlas-1b-20b

RealisticBPE5 String Atlas 1B 20B

Final 1B String Atlas checkpoint trained on FineWeb-Edu with five RealisticBPE5 tokenizer views.

HF repo: cminst/realistic-bpe5-string-atlas-1b-20b . Source run directory name: R5FW20B-StringAtlasRev-1B-20B-tillicum .

Data bundle: cminst/realistic-bpe5-fineweb-20b .

Files

• model.pt : final model weights
• config.json : training/model configuration saved by train_v3.py
• results.json : final evaluation metrics and logs
• string_atlas.json : String Atlas row byte-string metadata
• step_*/ : intermediate model-only checkpoints ( model.pt , config.json , results.json , and string_atlas.json when present)
• tokenizers/*.json : tokenizer JSON files
• optimizer and DDP resume state are intentionally excluded

Tokenizers

• general_mix_bpe32
• clean_web_bpe32
• code_skew_bpe32
• science_math_bpe32
• wiki_qa_bpe32

Final Metrics

• general_mix_bpe32 : BPB 0.8656 at step 19083
• clean_web_bpe32 : BPB 0.8657 at step 19083
• code_skew_bpe32 : BPB 0.8683 at step 19083
• science_math_bpe32 : BPB 0.8681 at step 19083
• wiki_qa_bpe32 : BPB 0.8680 at step 19083

Config Snapshot

{
  "anchor": "general_mix_bpe32",
  "anchor_weight": 0.2,
  "atlas_size": 50184,
  "completed_steps": 19083,
  "ctx_len": 2048,
  "d_model": 2048,
  "data_format": "packed_tokens",
  "input_mode": "string_atlas",
  "lr_decay_steps": 19083,
  "model_size": "1B",
  "n_heads": 32,
  "n_layers": 20,
  "output_mode": "string_atlas_softmax",
  "run_name": "R5FW20B-StringAtlasRev-1B-20B-tillicum",
  "string_atlas_key_mode": "byte_string_reversible",
  "tokens_processed": 20000205312,
  "vocab_sizes": {
    "clean_web_bpe32": 32000,
    "code_skew_bpe32": 32000,
    "general_mix_bpe32": 32000,
    "science_math_bpe32": 32000,
    "wiki_qa_bpe32": 32000
  }
}