v4.0.8

NaiboWang/EasySpiderv4.0.8Jun 17, 2026by justin-tahara

AI Summary

Version 4.0.8 includes dependency updates and fixes for LLM routing and vision detection, accompanied by a warning regarding OpenSearch document index migration.

Key Highlights

Bumped azure-cognitiveservices-speech to 1.50.0.
Fixed routing for Claude Fable 5 / Mythos 5 models.
Restored vision detection for LiteLLM Proxy custom-config providers.

Breaking Changes

Do not upgrade if preserving existing indexed documents without running the document index migration from v3.x.

New Features

LLM routing fixes
Vision detection restoration

Full Release Notes

## Warning
Do not upgrade to this release if you want to preserve your existing indexed documents but have not yet run the document index migration, which can be done from any version v3.x. [See additional documentation here](https://docs.onyx.app/admins/advanced_configs/opensearch_document_index_migration#opensearch-document-index-migration).

See the assets to download this version and install.

## What's Changed
* chore(deps): bump `azure-cognitiveservices-speech`: 1.38.0->1.50.0 (#11894) to release v4.0 by @jmelahman in https://github.com/onyx-dot-app/onyx/pull/11897
* fix(llm): route Claude Fable 5 / Mythos 5 through adaptive thinking (#11992) to release v4.0 by @jmelahman in https://github.com/onyx-dot-app/onyx/pull/11994
* fix(llm): restore vision detection for custom-config providers (LiteLLM Proxy) (#12136) [v4.0] by @justin-tahara in https://github.com/onyx-dot-app/onyx/pull/12140

**Full Changelog**: https://github.com/onyx-dot-app/onyx/compare/v4.0.7...v4.0.8