# Omnia vs OpenAI Agent Builder

> OpenAI has scheduled Agent Builder, the Evals platform and reusable prompts to shut down on 30 November 2026. Omnia keeps the agent, its prompts and its tests in one versioned pack that runs in your own infrastructure, on any model.

Category: Builders. Checked against OpenAI’s published material on 2026-10-22. Canonical page: https://www.altairalabs.ai/vs/openai-agent-builder/

## Moving off Agent Builder? Omnia keeps the agent, its prompts and its tests in your own repository.

OpenAI’s deprecations page schedules Agent Builder, the Evals platform and reusable prompts to shut down on the same day, 30 November 2026. The pack Omnia keeps them in runs in your cluster, on GPT or any other model.

## When it matters: 1 December 2026. A support agent built in Agent Builder last year.

**On Omnia:** The agent is still answering. Its prompts, tools, policy and scenarios are a pack in your repository, and last year’s tests still run against it. (Omnia docs: https://omnia.altairalabs.ai/reference/core/promptpacksource/)

**On OpenAI Agent Builder:** Agent Builder is scheduled to shut down on 30 November 2026, with the Evals platform and reusable prompts the same day. OpenAI suggests moving prompt content into application code and evals to Promptfoo. (source: https://developers.openai.com/api/docs/deprecations)

## The agent and its tests live in your repository

Prompts, tools, policy and scenarios are one versioned pack, synced from git, OCI or a configMap. (Omnia docs: https://omnia.altairalabs.ai/reference/core/promptpacksource/)

OpenAI Agent Builder: Reusable prompts shut down on 30 November 2026; OpenAI’s advice is to move their content into your application code. (source: https://developers.openai.com/api/docs/deprecations)

## Keep the model, or change it

Omnia speaks OpenAI’s protocol natively, alongside Anthropic, Gemini, Bedrock, Vertex, Ollama and vLLM. You can stay on GPT and test a second model against the same scenarios. (Omnia docs: https://omnia.altairalabs.ai/reference/core/provider/)

OpenAI Agent Builder: The suggested replacements are the Agents SDK or ChatGPT Workspace Agents. (source: https://developers.openai.com/api/docs/deprecations)

## Evaluation that gates the release

Each version goes through its real tools with simulated users, voice and adversarial callers among them, and the release waits on the result. A conversation that fails in production becomes a scenario every later version has to pass. *(enterprise)* (Omnia docs: https://promptarena.altairalabs.ai/arena/explanation/scenario-design/)

OpenAI Agent Builder: The Evals platform shuts down on 30 November 2026, with a migration guide to Promptfoo. (source: https://developers.openai.com/api/docs/deprecations)

## At a glance

| Topic | Omnia | Omnia docs | OpenAI Agent Builder | OpenAI Agent Builder docs | Source |
|---|---|---|---|---|---|
| Agent builder available after 30 November | The Arena builder writes the agent and its tests from a brief. *(enterprise)* | https://omnia.altairalabs.ai/how-to/evaluation/generate-a-project-with-the-builder/ | Shuts down. | not documented | https://developers.openai.com/api/docs/deprecations |
| Evals | Simulated users, voice, adversarial; gates the release. | https://promptarena.altairalabs.ai/arena/explanation/scenario-design/ | Shuts down; migrate to Promptfoo. | not documented | https://developers.openai.com/api/docs/deprecations |
| Stored prompts | In a versioned pack in your repository. | https://omnia.altairalabs.ai/reference/core/promptpacksource/ | Shut down; move into application code. | not documented | https://developers.openai.com/api/docs/deprecations |
| OpenAI models | Native OpenAI protocol, plus six others. | https://omnia.altairalabs.ai/reference/core/provider/ | Yes. | documented | https://developers.openai.com/api/docs/deprecations |
| Runs in your infrastructure | Your Kubernetes cluster, or AgentCore, Vertex or Foundry. | https://promptarena.altairalabs.ai/arena/explanation/deploy/overview/ | OpenAI-hosted. | not documented | https://developers.openai.com/api/docs/deprecations |

## Questions

**When does Agent Builder shut down?**

OpenAI’s deprecations page schedules Agent Builder, the Evals platform and reusable prompts to shut down on 30 November 2026.

**Can I keep using GPT models on Omnia?**

Yes. Omnia implements OpenAI’s protocol natively, and Azure OpenAI through Azure AI Foundry.

**What does moving cost?**

Omnia is free while you build and the core is free in production. The enterprise licence is one price per environment per year from £30,000, with nothing metered.