The 'gpt-5.3-codex-spark' model is not supported when using Codex with a ChatGPT account

ChatGPT Bugs
1

Environment

  • Surface: macOS
  • Browser or app version: app
  • Affected feature and model, if relevant: gpt-5.3-codex-spark

Bug

I used the gpt-5.3-codex-spark model yesterday without any issues. There was an update for the Codex macOS app this morning, so I installed it. Afterward, I noticed that the gpt-5.3-codex-spark model had disappeared.

Diagnostics

Exact error or screenshot:
When it happened (with timezone) and how often:

The ‘gpt-5.3-codex-spark’ model is not supported when using Codex with a ChatGPT account.

Ekran Resmi 2026-09-15 12.37.58
Ekran Resmi 2026-09-15 12.37.581504×128 12.4 KB

Ekran Resmi 2026-09-15 12.38.14
Ekran Resmi 2026-09-15 12.38.14510×430 21.7 KB

2

There has been an announcement on Twitter that this model will be retired.

I’ve pinged the team to update the docs.

Sorry if this is not the answer you were hoping for, but at least it should clarify the situation.