OpenAI just released their new Responses API and Agents SDK today (March 11, 2025). Since ellmer has gradually become the de-facto standard for working with LLMs from R, I was wondering if there are plans to support these new capabilities?

What’s New

• Responses API: Combines Chat Completions simplicity with tool-use capabilities
• Built-in tools: Web search, file search, and computer use
• Agents SDK: For orchestrating multi-agent workflows

This seems like a natural fit for ellmer’s existing architecture, especially since the package already has great support for tool registration and function calling.

A simple implementation might look like:

chat <- chat_openai(
  model = "gpt-4o",
  system_prompt = "You are a helpful assistant.",
  use_responses_api = TRUE,
  tools = c("web_search", "file_search")
)

OpenAI plans to sunset the Assistants API by mid-2026, so supporting the Responses API would future-proof ellmer integrations.

Is this something on the roadmap?
Happy to help test if needed!