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[PR #4253] Bedrock cohere fix max length 2048 #24456

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opened 2026-02-21 20:23:02 -05:00 by yindo · 0 comments
yindo commented 2026-02-21 20:23:02 -05:00
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Original Pull Request: https://github.com/langgenius/dify/pull/4253

State: closed
Merged: No

Description

It includes 2 changes:

  1. For Cohere, count the tokens as text length to avoid 2048 length limitation..
  2. For others, count the tokens with tiktoken tokennizer, uses gpt-4 instead of gpt2.

Fixes #3942

Type of Change

Please delete options that are not relevant.

  • Bug fix (non-breaking change which fixes an issue)
  • New feature (non-breaking change which adds functionality)
  • Breaking change (fix or feature that would cause existing functionality to not work as expected)
  • This change requires a documentation update, included: Dify Document
  • Improvement, including but not limited to code refactoring, performance optimization, and UI/UX improvement
  • Dependency upgrade

How Has This Been Tested?

Test with text file with consecutive punctuation marks or long English words. It will failed with expected maxLength: 2048 before. Now it is fixed by counting the tokens as chars.

  • TODO

Suggested Checklist:

  • I have performed a self-review of my own code
  • have commented my code, particularly in hard-to-understand areas
  • My changes generate no new warnings
  • I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods
  • optional I have made corresponding changes to the documentation
  • optional I have added tests that prove my fix is effective or that my feature works
  • optional New and existing unit tests pass locally with my changes
**Original Pull Request:** https://github.com/langgenius/dify/pull/4253 **State:** closed **Merged:** No --- # Description It includes 2 changes: 1. For Cohere, count the tokens as text length to avoid 2048 length limitation.. 2. For others, count the tokens with tiktoken tokennizer, uses gpt-4 instead of gpt2. Fixes #3942 ## Type of Change Please delete options that are not relevant. - [x] Bug fix (non-breaking change which fixes an issue) - [ ] New feature (non-breaking change which adds functionality) - [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected) - [ ] This change requires a documentation update, included: [Dify Document](https://github.com/langgenius/dify-docs) - [x] Improvement, including but not limited to code refactoring, performance optimization, and UI/UX improvement - [ ] Dependency upgrade # How Has This Been Tested? Test with text file with consecutive punctuation marks or long English words. It will failed with expected maxLength: 2048 before. Now it is fixed by counting the tokens as chars. - [ ] TODO # Suggested Checklist: - [x] I have performed a self-review of my own code - [x] have commented my code, particularly in hard-to-understand areas - [x] My changes generate no new warnings - [ ] I ran `dev/reformat`(backend) and `cd web && npx lint-staged`(frontend) to appease the lint gods - [ ] `optional` I have made corresponding changes to the documentation - [ ] `optional` I have added tests that prove my fix is effective or that my feature works - [ ] `optional` New and existing unit tests pass locally with my changes
yindo added the pull-request label 2026-02-21 20:23:02 -05:00
yindo closed this issue 2026-02-21 20:23:02 -05:00
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Reference: langgenius/dify#24456
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