# [Behavioral] OpenAI: Default value changed

> Source: <https://driftwatch.et/changes/openai-2026-10-23-a4e25820>
> Published: 2026-10-23 19:43:38+00:00

## What changed

Behavior shifts for every call that omits the field.

Affects `ImageGenTool` reachable from 14 operations.

"gpt-image-1" → "gpt-image-2"

## Who is affected

Code that calls OpenAI's ImageGenTool objects, used by 14 OpenAI operations.

## Before and after

| Where | Before | After | 
|---|---|---|
| ImageGenTool.model | gpt-image-1 | gpt-image-2 | 

Based on OpenAI’s published API specification. [How severity is decided](https://driftwatch.et/method).