OpenAI sets November 30 shutdown for Evals Platform and Agent Builder, deprecates three image models

OpenAI announced a round of platform deprecations in early June 2026, setting a November 30 deadline for the Evals Platform, Agent Builder, and reusable prompts, while also retiring three older image generation models with a December 1 shutdown date.

What's new

Evals Platform -- shutdown November 30, 2026 OpenAI notified developers on June 3 that its hosted evaluation infrastructure is being deprecated.

• June 3, 2026: Deprecation announced
• October 31, 2026: Existing evals become read-only
• November 30, 2026: Evals dashboard and API shut down

Agent Builder -- shutdown November 30, 2026 Also announced June 3, Agent Builder -- OpenAI's no-code agent construction interface -- is being retired. ChatKit remains available.

Reusable Prompts (v1/prompts API) -- shutdown November 30, 2026 OpenAI is removing the reusable prompt API, directing developers to move reusable prompt content into their application code.

GPT Image model deprecations -- shutdown December 1, 2026 On June 2, OpenAI deprecated three image generation models:

• gpt-image-1-mini -- replace with gpt-image-2
• gpt-image-1.5 -- replace with gpt-image-2
• chatgpt-image-latest -- replace with gpt-image-2

Container session billing change (effective June 2) Code Interpreter container sessions moved from a flat 20-minute billing rate to per-minute billing with a 5-minute minimum, reducing costs for short or fast-completing sessions.

Context

OpenAI has been consolidating its product surface through 2026. The Evals Platform was introduced in early 2025 to help developers test model outputs at scale. Agent Builder was a lower-code interface for building GPT-based agents that has become redundant alongside the Responses API and Codex.

The image model deprecations follow a rapid iteration cycle -- gpt-image-2 launched earlier in 2026, and the decision to retire gpt-image-1.5 and gpt-image-1-mini within months reflects the pace of iteration in image generation.

Why it matters

Developers building on the Evals API or Agent Builder have roughly five months before their tooling stops working. Organizations with test suites on the Evals API should begin migration planning now; the read-only gate at October 31 is a hard upstream dependency for any team relying on live eval writes.

The image model cleanup consolidates OpenAI's image generation surface around gpt-image-2. Teams still calling older endpoints need to update before December 1. The container billing change is a direct cost reduction for workloads that complete in under 20 minutes -- no code change required.