This document tracks the current status of ExLLM features based on comprehensive testing.
- Core Functionality: ✅ 100% Working (8/8 tests pass)
- Comprehensive Suite: ✅ 80% Working (12/15 tests pass)
- User Experience: ✅ 100% Functional (all example app features work)
ExLLM.chat/3- Basic chat functionality with all providersExLLM.stream/4- Real-time response streaming with callbacksExLLM.Core.Session- Conversation persistence and state management
- OpenAI - GPT models with function calling
- Anthropic - Claude models with tool use
- Google Gemini - Complete API suite with OAuth2
- Ollama - Local models (tested with llama3.2:1b)
- Groq - Ultra-fast inference
- OpenRouter - Access to 300+ models
- Mock Provider - Testing and development
- Function Calling - Tool use across all compatible providers
- Cost Tracking - Token usage and cost calculation
- Authentication - API key management and OAuth2 support
- Configuration - YAML-based model and provider configuration
- Error Handling - Comprehensive error handling and recovery
- Test Caching - Advanced response caching (25x faster integration tests)
- Status: API exists but function signature changed
- Missing:
ExLLM.Core.Context.truncate_messages/5 - Impact: Automatic message truncation for token limits
- Workaround: Manual message management in application code
- Status: Configuration system redesigned
- Missing:
ExLLM.Infrastructure.Config.ModelConfig.get_model_config/1 - Impact: Programmatic access to model metadata (context windows, pricing)
- Workaround: Use YAML configuration files directly
- Status: Validation system refactored
- Missing: Runtime configuration validation utilities
- Impact: No programmatic validation of ExLLM setup
- Workaround: Manual configuration verification
✅ Basic Chat - Real conversations with AI models
✅ Streaming Chat - Real-time token streaming
✅ Session Management - Conversation persistence
✅ Function Calling - Tool use and function definitions
✅ Cost/Usage Tracking - Token counting and cost calculation
✅ Error Handling - Proper error responses
✅ Provider Selection - Multiple providers working
✅ Response Structure - Correct API response format
✅ Basic Chat
✅ Streaming Chat
✅ Session Management
❌ Context Management (API changed)
✅ Function Calling
✅ Cost Tracking
✅ Provider Configuration
✅ Mock Provider
✅ Error Handling
✅ Batch Processing
✅ Token Estimation
❌ Model Capabilities (API changed)
✅ Provider Selection
✅ Response Validation
❌ Configuration Validation (API changed)
- Use Core APIs: Stick to
ExLLM.chat/3andExLLM.stream/4for reliable functionality - Manual Context Management: Implement your own message truncation logic if needed
- Direct Configuration: Read YAML files directly for model metadata access
- Priority 1: Fix context management API for automatic token limit handling
- Priority 2: Restore model capabilities API for programmatic metadata access
- Priority 3: Implement configuration validation for better developer experience
If upgrading from an older version, be aware that these APIs have changed:
ExLLM.Core.Context.truncate_messages/*- Function signature changedExLLM.Infrastructure.Config.ModelConfig.get_model_config/*- API redesigned- Configuration validation utilities - System refactored
The ExLLM library successfully powers:
- Real-time AI conversations with multiple providers
- Production chat applications with session persistence
- Streaming interfaces with live token delivery
- Multi-provider routing for reliability and cost optimization
- Local AI inference with Ollama integration
Bottom Line: ExLLM is production-ready for all core use cases. The incomplete features are advanced APIs that don't affect normal usage patterns.