New tools and features in the Responses API

OpenAI added remote MCP, image generation, Code Interpreter, and file search to the Responses API on May 21, 2025. The post says these tools span GPT-4o, GPT-4.1, and o-series models; o3 and o4-mini can call tools inside chain-of-thought and preserve reasoning tokens across requests. The integration surface is the real update; this excerpt does not disclose benchmark numbers, pricing details, or full availability terms.

Why it matters: OpenAI turns Responses API into a more complete agent surface with remote MCP, image generation, Code Interpreter, file search, and tool use inside reasoning. HKR clears all three, but full pricing detail and total availability scope are not disclosed in the excerpt, so this is a