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v1.9.0

probelabs/probev1.9.0Jun 2, 2026by lfnovo

AI Summary

Upgraded to Esperanto 2.22, introducing new audio providers like Mistral Voxtral and Deepgram, while improving connection tests and adding configuration options for Ollama and embeddings.

Key Highlights

  • Upgraded to Esperanto 2.22.0, unlocking new providers and inheriting upstream fixes.
  • New audio providers: Mistral Voxtral, Deepgram (Aura voices), and xAI.
  • Per-credential Ollama `num_ctx` override configuration in Settings.
  • Better speech-to-text connection tests that transcribe real speech clips.

Breaking Changes

  • Ollama default context window changed from 128000 to 8192.
  • Google embedding default model changed to `gemini-embedding-001` (old model removed).

New Features

  • Per-credential Ollama context window configuration
  • Environment variables for embedding batch size (`OPEN_NOTEBOOK_EMBEDDING_BATCH_SIZE`), CORS origins (`CORS_ORIGINS`), and min chunk size
  • Fixed URL-source embedding crash on single-character HTML fragments

Full Release Notes

## ✨ Highlights

- **Upgraded to Esperanto 2.22.0**, unlocking new providers and inheriting several upstream fixes.
- **New audio providers**:
  - **Mistral Voxtral** — speech-to-text and text-to-speech (reuses your Mistral credential)
  - **Deepgram** — text-to-speech (Aura voices) — *new provider*
  - **xAI** — text-to-speech
  - Completed the matrix: **Google** STT/TTS, **Vertex** TTS, **ElevenLabs** STT (Scribe)
- **Per-credential Ollama `num_ctx`** override — configure the context window for Ollama models in Settings → API Keys (translated across all 13 locales).
- Better **speech-to-text connection tests** — they now transcribe a real speech clip instead of silence, so a passing test shows actual text.

## ⚠️ Upgrade Notes (behavior changes inherited from Esperanto)

- **Ollama default context window (`num_ctx`) is now 8192** (was 128000) to avoid out-of-memory errors on consumer GPUs. If you ingest large documents with Ollama, set a higher `num_ctx` on the Ollama credential.
- **Google embedding default model is now `gemini-embedding-001`** — the previous default, `text-embedding-004`, was removed from Google's API. If you used Google embeddings with the old default, re-create the model and **re-embed your content** (the embedding dimensions changed).

## 🛠️ Inherited Esperanto fixes

- OpenRouter LLM & embedding requests now send a proper JSON body.
- Clear errors (instead of an opaque `TypeError`) when OpenAI-compatible endpoints return null embeddings.
- Streaming tool calls return proper objects across Anthropic, Google, Vertex, and Ollama.
- `base_url` trailing slashes normalized (fixes double-slash 301s for Ollama / self-hosted).
- Ollama "thinking" models (e.g. Qwen) merge reasoning content correctly.
- Model discovery honors a custom `base_url` (LiteLLM/vLLM/proxies).

## ➕ Also in this release

- `OPEN_NOTEBOOK_EMBEDDING_BATCH_SIZE` env var to tune embedding batch size (#735)
- `CORS_ORIGINS` env var to configure allowed API origins (#585, #597, #730)
- `OPEN_NOTEBOOK_MIN_CHUNK_SIZE` env var to filter degenerate tiny chunks
- Fixed URL-source embedding crash on single-character HTML fragments (#764)
- README Provider Support Matrix synced with actual capabilities

**Full changelog:** see [CHANGELOG.md](https://github.com/lfnovo/open-notebook/blob/main/CHANGELOG.md#190---2026-06-02) · compare [v1.8.5...v1.9.0](https://github.com/lfnovo/open-notebook/compare/v1.8.5...v1.9.0)