OpenRouter compatibility client

New Features:

1. Added OpenRouter compatibility client
   • require("openai.compat.openrouter") for OpenRouter API
   • See examples/openrouter.lua for usage

Responses API, Gemini compatibility, simplified streaming

Breaking Changes:

1. ChatSession no longer exported from main module

   • Use require("openai.chat_completions").ChatSession instead

2. Default model changed from gpt-3.5-turbo to gpt-4.1

3. chat() streaming callback now receives (delta, raw) instead of (chunk)

   • Use create_chat_completion() for the previous raw chunk behavior

New Features:

1. Added Responses API support

   • create_response(params): Create a new response
   • response(response_id): Get a response by ID
   • delete_response(response_id): Delete a response
   • cancel_response(response_id): Cancel a response

2. Added ResponsesChatSession for conversational state with Responses API

3. Added Gemini compatibility client

   • require("openai.compat.gemini") for Google Gemini API

4. Added create_chat_completion() method for raw streaming behavior

Improvements:

1. SSE parsing moved to dedicated openai.sse module

2. Removed lpeg dependency in favor of simpler line-based SSE parsing

v1.4.3

• Better support for API compatible endpoints like ollm
• Don't send values where defaults are available (fixes issue with o1-preview failing due to temperature parameter)5

Improved support for images & assistants

New Features:

1. Added support for image generation endpoint

   • New method: image_generation(params)

2. Added new endpoints for Assistants API:

   • assistants(): Get list of assistants
   • threads(): Get list of threads
   • thread_messages(thread_id): Get messages for a specific thread
   • delete_thread(thread_id): Delete a specific thread

3. Added new endpoints for managing files:

   • files(): Get list of files
   • file(file_id): Get details of a specific file
   • delete_file(file_id): Delete a specific file

Improvements:

1. Updated content format to support image_url input for GPT Vision

   • Added support for image_url type in content format

2. Made authorization optional

   • Allows usage with local models that don't require API key

v1.2.0 - Support for chat with functions

OpenAI allows sending a list of function declarations that the LLM can decide to call based on the prompt. The function calling interface must be used with chat completions and the gpt-4-0613 or gpt-3.5-turbo-0613 models or later.

This update supports providing a function schema to the initialization of the chat session object.

The function result is then detected when parsing the response from a chat message.

See https://github.com/leafo/lua-openai/blob/main/examples/example5.lua or the README for a complete example.

v1.1.0 - Improved error message output for bad-status errors

Returned error messages will include the message from the server if available.

Full Changelog: v1.0.0...v1.1.0

v1.0.0

Initial release

luarocks install lua-openai

Full Changelog: https://github.com/leafo/lua-openai/commits/v1.0.0