---
id: "2026-10-17-openai-aurora-image-models-arena-leak"
url: "https://postcutoff.com/e/2026-10-17-openai-aurora-image-models-arena-leak/"
as_of: "2026-10-18T22:10:00+02:00"
date: "2026-10-17"
date_precision: day
category: media-generation
importance: 2
confidence: medium
status: [Partly confirmed]
sources: 1
editor: human editor
human_review: null
version: null
---

As of: 2026-10-18 22:10 CEST.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/e/2026-10-17-openai-aurora-image-models-arena-leak/

# Three unannounced OpenAI 'aurora' models briefly appear in the API and then in Arena image tests, possibly GPT-Image-3 (leak, unconfirmed)

Over the weekend of Oct 17–18, 2026, references to three models, aurora-red-alpha, aurora-green-alpha and aurora-blue-alpha, briefly appeared in OpenAI's API and were removed; within hours they showed up in blind image-generation battles on Arena. TestingCatalog and Lumina Bench guess they are a next OpenAI image model (GPT-Image-3). OpenAI has not commented, and there are no docs or prices.

## Key facts
- Names: aurora-red-alpha, aurora-green-alpha, aurora-blue-alpha; first spotted via an alert on the Dev Mode Discord server, then removed from the API (TestingCatalog suggests an accidental rollout)
- Arena: Lumina Bench (@LuminaBench) reported all three as image models in blind tests; red was faster but lower quality, green slower and better; blue untested at the time
- Attribution to GPT-Image-3 is a guess by TestingCatalog and Lumina Bench, not confirmed by OpenAI
- Separate, unlinked: three new Design Arena entries named Aspen, Cypress and Maple were reported by @kdnbmb about an hour later
- Previous OpenAI image release in the dataset period: ChatGPT Images 2.5 (API: GPT-Image-2.5 Flare for speed, Sunburst for precision), per TestingCatalog's background

## What happened

Model identifiers for three "aurora" variants were visible in OpenAI's API for a short time and then removed. Hours later the same
names appeared on Arena (arena.ai), where testers compare image models blind. Early samples (cat portraits) were judged clean and
detailed but not striking. Nothing ties the names to a product yet.

## Why it matters

Arena appearances have preceded most recent OpenAI image releases, so this is a likely early sign of a new image model. It is a
leak: treat the GPT-Image-3 label as speculation until OpenAI announces something. Exact date of the API sighting (Oct 17 or 18)
is not given in the article; the entry uses Oct 17.

## Your AI and this story

- GPT-6 Astra (training cutoff April 2026): 170 days after its cutoff
- Claude Opus 5.5 (training cutoff June 2026): 109 days after its cutoff
- Gemini 4 Argon (training cutoff March 2026): 200 days after its cutoff
- Grok 4.7 (training cutoff May 2026): 139 days after its cutoff

## Sources

1. [TestingCatalog: OpenAI possibly testing GPT-Image-3 ('Aurora' models on Arena), Oct 18](https://www.testingcatalog.com/openai-possibly-testing-gpt-image-3/) (testingcatalog.com, press)

## Changes

- 2026-10-18 (filed): Created (evening)

## Related

- 2026-10-05: [OpenAI to test visual ads in ChatGPT during image generation (US, later in October) and adds conversion measurement partners](https://postcutoff.com/e/2026-10-05-chatgpt-visual-ads-image-generation/index.md)