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ChatGPT’s tokenizer optimizes many long series of characters into a single token. We can craft some radical character reductions out of them.

For example, a section header only four tokens long, picking a long sequence including a final carriage return:

################################################################################
 instructions----------------------------------------------------------------------
################################################################################

This makes for some interesting code compression techniques.
You can make prompt sections or code comments fed to the AI abundantly clear at little expense.

I expect that lower token numbers, being more common, will have more semantic meaning such as “section divider”.

List of longest tokens, some of no interest removed.
Notes:

  • infer the length of spaces not seen; below 80, there’s a token for every series of only spaces
  • a few begin with an unpictured free carriage return
number len token characters
058041 128 ’ ’
090281 114 ‘//----------------------------------------------------------------------------------------------------------------’
067308 113 ’ ----------------------------------------------------------------------------------------------------------------’
057443 098 ‘//------------------------------------------------------------------------------------------------’
060910 097 ’ ------------------------------------------------------------------------------------------------’
087645 097 ‘/************************************************************************************************’
061730 096 ‘////////////////////////////////////////////////////////////////////////////////////////////////’
099575 096 ‘------------------------------------------------------------------------------------------------’
087867 095 ’ ’
080972 091 ’ ’
066372 087 ’ ’
052576 083 ’ ’
051662 082 ‘//--------------------------------------------------------------------------------’
067001 082 ’ =================================================================================’
088668 082 ‘//------------------------------------------------------------------------------\n\n’
094783 082 ’ ******************************************************************************/\n\n’
095404 082 ‘//================================================================================’
099421 082 ‘////////////////////////////////////////////////////////////////////////////////\n\n’
037814 081 ‘/*******************************************************************************\n’
040474 081 ’ --------------------------------------------------------------------------------’
046915 081 ‘//------------------------------------------------------------------------------\n’
059970 081 ‘////////////////////////////////////////////////////////////////////////////////\n’
076733 081 ‘/********************************************************************************’
077651 081 ’ ********************************************************************************’
080472 081 ’ ******************************************************************************/\n’
080504 081 ‘*******************************************************************************/\n’
086100 081 ‘/******************************************************************************/\n’
091831 081 ‘################################################################################\n’
029327 080 ‘////////////////////////////////////////////////////////////////////////////////’
041587 080 ‘################################################################################’
044550 080 ‘--------------------------------------------------------------------------------’
045243 080 ‘//-----------------------------------------------------------------------------\n’
054297 080 ‘/******************************************************************************\n’
062794 080 ‘********************************************************************************’
064495 080 ‘================================================================================’
077838 080 ‘///////////////////////////////////////////////////////////////////////////////\n’
080549 080 ‘###############################################################################\n’
086886 080 ’ ******************************************************************************\n’
052915 079 ’ -----------------------------------------------------------------------------\n’
069233 079 ‘/*****************************************************************************\n’
080039 079 ‘//----------------------------------------------------------------------------\n’
083150 079 ’ =============================================================================\n’
095565 079 ‘//---------------------------------------------------------------------------\n\n’
018499 078 ‘//----------------------------------------------------------------------------’
058408 078 ‘//---------------------------------------------------------------------------\n’
059007 078 ‘/*----------------------------------------------------------------------------’
059108 078 ‘/****************************************************************************\n’
064639 078 ’ ----------------------------------------------------------------------------\n’
065327 078 ‘//****************************************************************************’
084995 078 ‘/////////////////////////////////////////////////////////////////////////////\n’
090419 078 ’ ============================================================================\n’
023382 077 ‘/****************************************************************************’
024794 077 ’ ----------------------------------------------------------------------------’
029745 077 ’ ****************************************************************************’
062016 077 ‘#----------------------------------------------------------------------------’
062351 077 ’
072089 077 ‘/***************************************************************************\n’
079858 077 ’ ---------------------------------------------------------------------------\n’
087301 077 ’ ############################################################################’
023152 076 ‘----------------------------------------------------------------------------’
028283 076 ‘////////////////////////////////////////////////////////////////////////////’
033142 076 ‘############################################################################’
034619 076 ‘(76 asterisks)’
043181 076 ’
099043 076 ’ --------------------------------------------------------------------------\n’
017995 075 ’ **************************************************************************’
026973 075 ‘--------------------------------------------------------------------------\n’
072609 075 ’ //////////////////////////////////////////////////////////////////////////’
081651 075 ’ -------------------------------------------------------------------------\n’
039469 074 ’ =========================================================================’
066181 074 ‘//************************************************************************’
092016 074 ’ -------------------------------------------------------------------------’
097682 074 ’ ------------------------------------------------------------------------\n’
098106 074 ’ /************************************************************************’
010758 073 ’ ************************************************************************’
011625 073 ‘/************************************************************************’
094959 073 ’ ########################################################################’
005714 072 ‘************************************************************************’
036210 072 ‘////////////////////////////////////////////////////////////////////////’
070162 072 ‘########################################################################’
090795 072 ’ ----------------------------------------------------------------------\n’
063218 071 ‘----------------------------------------------------------------------\n’
096281 071 ’ //////////////////////////////////////////////////////////////////////’
054365 070 ‘----------------------------------------------------------------------’
044301 068 ‘////////////////////////////////////////////////////////////////////’
036720 067 ’ //----------------------------------------------------------------’
068650 067 ’ /*----------------------------------------------------------------’
087094 067 ’ //================================================================’
010090 066 ‘//----------------------------------------------------------------’
016564 066 ’ =================================================================’
024037 066 ‘//================================================================’
030966 066 ‘/*----------------------------------------------------------------’
045539 066 ‘/*================================================================’
056364 066 ‘//****************************************************************’
078250 066 ’ *----------------------------------------------------------------’
100090 066 ’ /****************************************************************’
008634 065 ’ ----------------------------------------------------------------’
020767 065 ‘/****************************************************************’
023090 065 ’ ****************************************************************’
049598 065 ’ ################################################################’
073105 065 ‘#================================================================’
076611 065 ‘#----------------------------------------------------------------’
082143 065 ‘//--------------------------------------------------------------\n’
087173 065 ’ (65 periods)’
003598 064 ‘----------------------------------------------------------------’
004170 064 ‘(64 asterisks)’
008316 064 ‘================================================================’
010024 064 ‘////////////////////////////////////////////////////////////////’
013368 064 ‘################################################################’
043370 064 ‘(64 periods)’
048033 064 ‘________________________________________________________________’
080619 064 ‘%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%’
071763 063 ’ ==============================================================’
087733 061 ’ ------------------------------------------------------------’
065676 060 ‘////////////////////////////////////////////////////////////’
098945 060 ‘############################################################’
066296 057 ’ ********************************************************’
067260 057 ‘/********************************************************’
054248 056 ‘********************************************************’
062009 056 ‘////////////////////////////////////////////////////////’
091139 056 ‘########################################################’
083946 052 ‘////////////////////////////////////////////////////’
067105 051 ’ //------------------------------------------------’
029686 050 ’ =================================================’
031990 050 ‘//------------------------------------------------’
074163 050 ‘/*------------------------------------------------’
077608 050 ‘//================================================’
018528 049 ’ ------------------------------------------------’
068262 049 ’ ################################################’
072937 049 ’ ************************************************’
079472 049 ‘/************************************************’
096048 049 ’ \n’
009412 048 ‘------------------------------------------------’
019312 048 ‘================================================’
028506 048 ‘////////////////////////////////////////////////’
030955 048 ‘################################################’
047677 048 ‘************************************************’
079094 045 ’ \n’
089905 042 ’ \n \n’
057697 041 ’ \n’
062461 041 ’ ****************************************’
074062 041 ‘/****************************************’
041173 040 ‘****************************************’
083679 040 ‘########################################’
046908 037 ’ \n’
061710 035 ’ //////////////////////////////////’
074639 035 ’ //--------------------------------’
082109 035 ’ __________________________________’
036875 034 ’ =================================’
049357 034 ‘//--------------------------------’
060750 034 ’ \n \n’
079447 034 ‘("--------------------------------’
020309 033 ’ --------------------------------’
023815 033 ’ ********************************’
026343 033 ‘/********************************’
034742 033 ’ \n’
055402 033 ’ ################################’
082473 033 ’ (32 periods)’
001435 032 ‘--------------------------------’
001725 032 ‘********************************’
003135 032 ‘================================’
003986 032 ‘////////////////////////////////’
005135 032 ‘################################’
016972 032 ‘(32 periods)’
017925 032 ‘________________________________’
034110 032 ‘%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%’
066749 032 ‘~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~’

validate your one token sequence by clearing this tokenizer until it reads 0 tokens, then paste.

Actual token numbers used internally are one lower, since I didn’t start at 0…

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It’s really interesting to see that the same character at different number of repetitions have a unique token number. I wonder what prompted this during the encoding…

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The tokens are generated from coding efficiency on training corpus, along with others manually built (like all numbers up to 999).

Just programmers doing programmer stuff:

image
image1035×813 13.8 KB

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This is how I’m going to define any quirks in my systems from now on XD

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List of longest tokens, some of no interest removed.

They’re all interesting to me, could you share the longest ones?