Key Takeaways
- Open Responses: OpenAI donated its spec for a common LLM API to the Agentic AI Foundation on October 22, 2026.
- Agentic AI Foundation projects: four projects were added in that announcement, 40 percent of the foundation's 10 hosted projects.
- Open Responses adoption: an OpenAI spokesperson said Vercel AI Gateway and Databricks Model Serving already implement the spec.
- Neither the release nor The New Stack gives an adoption count for Open Responses.
OpenAI donated its specification for a common LLM API, Open Responses, to the Agentic AI Foundation (AAIF) on October 22, 2026, as one of four new projects. The foundation announced four new projects that day, Open Responses among them, and said they bring it to 10 hosted projects, up from three launch projects in December 2025. That makes four of the foundation's 10 hosted projects, or 40 percent, from one announcement.
Open Responses is one of four new projects at the Agentic AI Foundation
The Linux Foundation release lists Agent Skills from Anthropic and Open Responses from OpenAI, along with OpenEnv and OpenSandbox from two other companies. Open Responses is an open specification for building multi-provider, interoperable LLM interfaces, based on the OpenAI Responses API, so developers can describe requests and outputs once and run them across model providers with minimal translation. A specification is a written standard that other companies can build to. An LLM API is the interface developers use to send requests to large language models.
Steve Coffey, a member of technical staff at OpenAI, said in the release: "Open Responses is thrilled to be joining the AAIF to further our mission of helping developers build great products on today's language models through simple, clean, and unified interfaces."
Manik Surtani, CTO and co-founder of the Agentic AI Foundation, summed up the growth in one line: "A year ago, AAIF launched with three projects and a bet that agentic AI needed a neutral home to thrive."
OpenAI says Vercel AI Gateway and Databricks Model Serving already implement the spec
An OpenAI spokesperson told The New Stack that Vercel AI Gateway and Databricks Model Serving already implement Open Responses. The spokesperson described the purpose of the spec: "Open Responses addresses another part of building agents by giving developers a shared format for working with models across endpoints that support it, so they have fewer provider-specific integrations to maintain." The foundation's release gives none for Open Responses, and the OpenAI spokesperson named two platforms without a count of users or installs.
The New Stack's list of supporters leaves out Anthropic, which defines its own Messages API for giving developers access to its models. Anthropic is a member of the AAIF, as The New Stack notes.
Related WYDE coverage: Anthropic Donates Agent Skills to the Agentic AI Foundation, Reporting Nearly 280 Million Installs.
Four of 10 hosted projects came in one announcement
The release says the additions bring the Agentic AI Foundation to 10 hosted projects. Four of those 10 were announced on October 22, 2026, which is 40 percent (4 divided by 10). The four new projects also outnumber the three projects the foundation launched with in December 2025.
That share shows how much of the hosted portfolio arrived in one announcement. It does not show usage. Neither the release nor The New Stack reports usage for Open Responses, so the project count cannot show how many developers or products rely on the spec.
People Also Ask
What is Open Responses?
Open Responses is an open specification for building multi-provider, interoperable LLM interfaces, based on the OpenAI Responses API. OpenAI donated Open Responses to the Agentic AI Foundation on October 22, 2026.
Which platforms already implement Open Responses?
An OpenAI spokesperson said Vercel AI Gateway and Databricks Model Serving already implement Open Responses. The New Stack's list of supporters does not include Anthropic.
How many projects does the Agentic AI Foundation host?
The Agentic AI Foundation hosts 10 projects after its October 22, 2026 announcement, up from three launch projects in December 2025. Four of those 10 projects, including Open Responses, were announced that day.
Did the donation report adoption numbers for Open Responses?
Neither the Linux Foundation release nor The New Stack gives an adoption count for Open Responses.
Sources: Linux Foundation, The New Stack, Anthropic.