rustbpe

Source

• Source kind: github-repository
• URL: https://github.com/karpathy/rustbpe
• Discovery source: https://github.com/karpathy/rustbpe
• License: MIT
• Distribution policy: public-summary-plus-license-aware-excerpts
• Public mirror status: partial excerpt
• Content hash: 4a2d81dd19cb54ad2d637e39726c04a0b19a54f11612d014b95a4f5324dbda06
• First seen: 2026-05-15
• Last changed: 2026-05-15

Classification

• Primary category: Tokenization and language modeling
• Corpus source note: 2026-05-15-karpathy-public-corpus
• Project taxonomy: karpathy-project-taxonomy
• Idea map: karpathy-idea-map
• Topic hub: karpathy-public-work

Summary

rustbpe $1](https://github.com/karpathy/rustbpe/actions/workflows/ci.yml)$1](https://pypi.org/project/rustbpe/) $1](https://opensource.org/licenses/MIT)ThemissingtiktokentrainingcodeAlightweightRustlibraryfortrainingGPT-styleBPEtokenizers.The$1 library is excellent for inference but doesn’t support training. The HuggingFace $1librarysupportstrainingbutcarriessignificantcomplexityfromyearsofaccumulatedtokenizervariants.My$1 library handles both training and inference, but only in Python and not optimized for speed. rustbpe fills this gap: a simple, efficient BPE training implementat…

What This Teaches

• How tokenization and sequence modeling mechanics connect to practical LLM behavior.
• Useful when debugging prompts, corpora, token budgets, or tokenizer-dependent failures.

Why It Matters

This is high-priority for Vipin because it connects directly to LLM systems, evaluation, and research implementation judgment.

Repository Snapshot

• Full name: karpathy/rustbpe
• Default branch: master
• HEAD: ddf848f6961a0655dc8693742fc338e5682c0d3b
• Stars at crawl: 454
• Forks at crawl: 52
• File count: 11
• README path: README.md
• License path: LICENSE
• Created: 2026-01-03T21:20:46Z
• Updated: 2026-05-12T05:30:15Z
• Pushed: 2026-01-03T22:24:54Z

Top-Level Structure

• [root]: 7
• .github: 2
• src: 1
• tests: 1

File Extension Profile

• .toml: 2
• .yml: 2
• .gitignore: 1
• .lock: 1
• .md: 1
• .py: 1
• .python-version: 1
• .rs: 1
• [none]: 1

Tags / Release-Like Markers

• No git tags found in the shallow local clone.

Sample File Tree

• .github/workflows/ci.yml
• .github/workflows/release.yml
• .gitignore
• .python-version
• Cargo.lock
• Cargo.toml
• LICENSE
• pyproject.toml
• README.md
• src/lib.rs
• tests/python/test_tokenizer.py

Public Handling Notes

• EXTRACTED: This page records public metadata and a source-grounded summary.
• INFERRED: Full local preservation, when available, is for private/local use unless a license or explicit source policy makes public redistribution safe.
• Do not treat this page as permission to republish unlicensed source text or code wholesale.