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Changelog

This is the changelog for the open source version of tiktoken.

[v0.7.0]

  • Support for gpt-4o
  • Performance improvements

[v0.6.0]

  • Optimise regular expressions for a 20% performance improvement, thanks to @paplorinc!
  • Add text-embedding-3-* models to encoding_for_model
  • Check content hash for downloaded files
  • Allow pickling Encoding objects. Registered Encoding will be pickled by reference
  • Workaround PyO3 bug for frozenset conversion

Thank you to @paplorinc, @mdwelsh, @Praneet460!

[v0.5.2]

  • Build wheels for Python 3.12
  • Update version of PyO3 to allow multiple imports
  • Avoid permission errors when using default cache logic

[v0.5.1]

  • Add encoding_name_for_model, undo some renames to variables that are implementation details

[v0.5.0]

  • Add tiktoken._educational submodule to better document how byte pair encoding works
  • Ensure encoding_for_model knows about several new models
  • Add decode_with_offets
  • Better error for failures with the plugin mechanism
  • Make more tests public
  • Update versions of dependencies

[v0.4.0]

  • Add decode_batch and decode_bytes_batch
  • Improve error messages and handling

[v0.3.3]

  • tiktoken will now make a best effort attempt to replace surrogate pairs with the corresponding Unicode character and will replace lone surrogates with the Unicode replacement character.

[v0.3.2]

  • Add encoding for GPT-4

[v0.3.1]

  • Build aarch64 wheels
  • Make blobfile an optional dependency

Thank you to @messense for the environment variable that makes cargo not OOM under emulation!

[v0.3.0]

  • Improve performance by 5-20%; thank you to @nistath!
  • Add gpt-3.5-turbo models to encoding_for_model
  • Add prefix matching to encoding_for_model to better support future model versions
  • Fix a bug in the README instructions on extending tiktoken
  • Update the set of available encodings
  • Add packaging metadata

[v0.2.0]

  • Add tiktoken.encoding_for_model to get the encoding for a specific model
  • Improve portability of caching logic

Thank you to @fritzo, @arvid220u, @khanhvu207, @henriktorget for various small corrections

[v0.1.2]

  • Avoid use of blobfile for public files
  • Add support for Python 3.8
  • Add py.typed
  • Improve the public tests

[v0.1.1]

  • Initial release