v0.2.81

rust-lang/rustlingsv0.2.81Feb 18, 2026by akaashrp

AI Summary

A major update featuring an engine overhaul, OpenAI API compatibility, expanded model support, and various performance and integration improvements.

Key Highlights

Engine and API overhaul: ChatModule refactored into Engine/MLCEngine
OpenAI API: mirror chat/completions APIs, stateful options, function calling and embeddings support
Expanded prebuilt model support: added support for more models (Llama 2/3/3.1/3.2, Mistral variants, Gemma 2, Qwen2/2.5/3, Phi family)
Runtime and caching: WebGPU performance/reliability improvements
XGrammar integration: JSON-schema/grammar-constrained generation

New Features

ChatModule refactored into Engine/MLCEngine
Multi-model loading
Conversation template unification
IndexedDB caching support
RAG/doc-chat examples

Full Release Notes

* Engine and API overhaul: ChatModule refactored into Engine/MLCEngine, consolidated constructor/reload behavior, multi-model loading, better worker lifecycle, concurrency handling
* OpenAI API: mirror chat/completions APIs, stateful options, function calling and embeddings support
* Conversation templates: unified conversation template schema with custom templates
* Expanded prebuilt model support: added support for more models (Llama 2/3/3.1/3.2, Mistral variants, Gemma 2, Qwen2/2.5/3, Phi family, including vision)
* Runtime and caching: WebGPU performance/reliability improvements (more GPU-side kernels, better OOM/deviceLost handling), wasm/prebuilt versioning updates, support IndexedDB caching
* XGrammar integration: JSON-schema/grammar-constrained generation, XGrammar structural tag
* TVM-FFI integration: refactor for compatibility with more recent TVM commits and TVM FFI 
* Examples: ServiceWorkerEngine + updated Chrome extension demos, new RAG/doc-chat examples, tool calls via structural tag
* CI: GitHub actions for linting and pre-commit hooks 

**Full Changelog**: https://github.com/mlc-ai/web-llm/compare/v0.2.0...v0.2.81