Open Responses Standardizes LLM JSON API
Open Responses, a vendor-neutral specification derived from OpenAI's Responses API, defines a documented JSON API standard for clients to interact with hosted LLMs. It launches with partners including OpenRouter, Hugging Face, LM Studio, vLLM, Ollama and Vercel, and provides server-side conformance tests and a React test app. The official repository includes src/lib/compliance-tests.ts; a client-side compliance suite is currently missing.
Key Points
- 1Defines vendor-neutral JSON API derived from OpenAI Responses for hosted LLM interoperability
- 2Lists major launch partners including OpenRouter, Hugging Face, vLLM, Ollama, Vercel, expanding compatibility
- 3Provides server conformance tests but lacks client compliance suite, prompting community client development
Scoring Rationale
Strong industry adoption and official tooling, but limited client-side conformance tests reduce immediate interoperability assurance.
Sources
Public references used for this report.
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