litellm/backend
devin-ai-integration[bot] 0abd9267c1
feat(tokenizer): preserve Python defaults with opt-in Rust dispatch (#42174)
* ci: benchmark and gate an installed release wheel

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* ci: simplify installed-wheel benchmark check

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* feat(rust): add native tokenizer codec

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* refactor(tokenizer): route Python tokenization through the Rust extension

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* style(lint): format tokenizer call

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* fix(packaging): restore runtime dependencies and native images

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* fix(tokenizer): preserve Python SDK behavior with Rust tokenizers

* fix(tokenizer): restore compatibility paths

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* refactor(tokenizer): count custom tokenizers directly

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* fix(tokenizer): preserve caller-supplied Python tokenizer counts

* fix(tokenizer): reuse packaged vocabularies in the native wheel

* refactor(rust_bridge): route token counting through the catalog as RUST_OPT_IN

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* fix(spend_tracking): compare tokenizer groups by value

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* chore(deps): re-resolve filelock under the <4.0 pin

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* fix(llms): align transformation override signatures with base configs

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* build(rust): use fat LTO to keep the native wheel under the 35 MB limit

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* feat(tokenizer): preserve Python defaults with opt-in Rust dispatch

* test(proxy): tolerate missing litellm.utils.Tokenizer when patching it

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* test(proxy): patch the tokenizer dispatch function instead of the removed alias

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* feat(tokenizer): give the Rust wrappers the tiktoken and tokenizers surface

Callers of litellm.encoding and litellm.create_tokenizer must see the same
read-only API whichever backend the catalog selects.

- OpenAIEncoding mirrors tiktoken.Encoding: n_vocab, max_token_value,
  token_byte_values, encode_single_token, encode_with_unstable,
  encode_to_numpy, decode_with_offsets, is_special_token, repr; the Rust
  tiktoken crate keeps a Vocabulary beside each CoreBPE and reports the
  requested encoding name (gpt2 stays gpt2).
- HuggingFaceTokenizer mirrors the read-only tokenizers.Tokenizer surface
  (token_to_id, id_to_token, get_vocab, get_vocab_size,
  get_added_tokens_decoder, num_special_tokens_to_add, padding, truncation,
  encode_special_tokens, from_buffer); HuggingFaceEncoding gains the
  char/word/token lookups, pad, truncate, set_sequence_id and merge.
  Mutators stay on the Python tokenizer.
- from_json/from_pretrained claim the fork gate only when the huggingface
  feature is compiled in; the surrogate fallback matches on the Codec.
- Tokenizer caching is keyed on the same catalog Context the dispatch runs
  on; rust_tokenizer reads the encoding name without loading an encoding;
  LITELLM_RUST parsing is cached.
- Drop the unused tiktoken_encoding_for_model export and Error::Download.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

* fix(tokenizer): close the exhaustive matches with assert_never

CodeQL reads a `match` over a Literal with no default arm as an implicit
`None` return. `assert_never` makes the exhaustiveness explicit for both the
HuggingFace tokenizer loader and the Rust token-counter factory.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

* feat(tokenizer): derive the fast counter from the shared tokenizer

The count-only counter (`fast` feature) and the codec each parsed the same
artifact: TokenCounter took the Anthropic JSON and the tiktoken rank files
from Python while Tokenizer loaded them again. One parse now serves both.

- FastTokenizer builds from a model another loader holds: `from_shared`
  takes the Arc<tokenizers::Tokenizer> the HF codec keeps, and
  `from_*_pairs` take the ranks the tiktoken vocabulary already parsed.
- `FastCounter::fast_counter` in the core crate derives it from either codec;
  encodings the fast scanner does not reproduce are refused.
- Native `Tokenizer.count(text, fast=False)` opts into that counter, built
  once per tokenizer on first use; `TokenCounter.from_tokenizer(tokenizer,
  fast=False)` replaces the JSON and rank-file constructors.
- The Python route counts over the native tokenizers the codec path shares
  (`native_encoding`, `native_anthropic`) and no longer reads rank files;
  the packaged Anthropic tokenizer has one loader, `tokenizer_dispatch.anthropic`.
- Public wrappers gain `count(text, fast=False)`.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

---------

Co-authored-by: Yujong Lee <yujong@berri.ai>
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>
2026-09-22 04:41:11 +00:00
..
routes feat(ui): show prompt caching requests and net savings 2026-09-19 18:27:38 -07:00
Dockerfile feat(tokenizer): preserve Python defaults with opt-in Rust dispatch (#42174) 2026-09-22 04:41:11 +00:00
main.py chore(oss): litellm oss staging 120626 (#30292) 2026-06-12 09:49:25 -07:00