Codex 28 · Theme · #53

Model availability mismatch across surfaces

9people describe this

9 on X

10 problems · first reported 7 Oct 2026

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Where OpenAI stands

Not addressed yet

No recorded announcement has answered this yet.

In their words

What people said

Problem
In the meantime, I don't even see Sol 6 in Codex (Plus subscription and latest vscode extension), only Soñ 5.6 and Astra.

@CodigoBinario_ on X ↗ · 17 Oct 2026
Problem
Hi @thsottiaux, I’m getting this error across all models in Codex. I haven’t changed any of the default settings. The screenshot shows that GPT-6 Luna is receiving “minimal,” which it doesn’t support. Could you take a look? This is blocking me from using Codex.

@Nicolas07935492 on X ↗ · 16 Oct 2026
Problem
I've noticed that UltraFast mode for Sol 6.1 in Codex is really inconsistent. Sometimes it shows up, sometimes it just disappears. Please fix it

@50s_fromnow on X ↗ · 15 Oct 2026
Problem
Hey @keyanzhang @sharifshameem — when will Plus users get GPT-6 Luna and Sol in local Codex, like we already have in Work on the web? On Windows Codex Desktop, they still don't appear in the model picker, and gpt-6-luna also reports that it's unsupported with a ChatGPT account.…

@Mryan2005_1 on X ↗ · 9 Oct 2026
Problem
I’m on the $500 Pro plan. GPT-6.1 Sol’s Ultrafast (8×) option appeared yesterday but disappeared after a few hours of use. Why, and how can I get it back?

@xuyansheng on X ↗ · 9 Oct 2026
Problem
Thank you for the improvements, Tibo! As a Pro 500 subscriber, I’m seeing two issues with GPT-6.1 Sol ultrafast: the option sometimes disappears from the model picker, and when I can select it, it doesn’t feel faster. Is this known and being worked on, or am I missing something?

@MountainZeb on X ↗ · 9 Oct 2026
Problem
I can not get my chat replacement to function. GPT-6.1 Sol is complete shit. They claim 5.6 is still available but impossible to lead.

@EncoreModern on X ↗ · 9 Oct 2026
Problem
Since this morning, the model picker in Chat only shows GPT-6 models. GPT-5.6 Sol I intentionally used has disappeared from the Chat model picker (still available in Work). Is this intentional? Pro still lists it as available. Sudden changes without notice are disruptive.

@Altair7_lush on X ↗ · 8 Oct 2026
Problem
Hey Tibo, I have ChatGPT Pro. In Codex, selecting gpt-6-astra throws this error: The 'gpt-6-astra' model is not supported when using Codex with a ChatGPT account. Only older models like 6 Luna /5.6 Terra show up. Is this a backend permission sync bug?

@Jomolora on X ↗ · 7 Oct 2026
Problem
Hey Tibo, any idea when the bug preventing Plus users from seeing GPT-6 Luna in ChatGPT Codex on Windows will be fixed?

@Mryan2005_1 on X ↗ · 7 Oct 2026

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“Shipped” means an announcement was linked to the theme by AI, not that the problem is fixed for everyone. “Not addressed yet” means no recorded announcement was linked; it is not proof that nothing changed.

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Corrections

Changes to this theme

19 Oct 2026, 11:35 UTC

“Unsupported setting passed to models” was merged into this theme: JEV judged them the same problem.
18 Oct 2026, 23:12 UTC

“New model not visible” was merged into this theme: JEV judged them the same problem.
11 Oct 2026, 11:57 UTC

Renamed from “Advertised model access unavailable” to “Model availability mismatch across surfaces” as more people described it.
10 Oct 2026, 06:32 UTC

“Model availability differs by workspace” was merged into this theme: JEV judged them the same problem.

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X thread: 2769 replies to the promise post collected (4 Oct 2026 – 26 Oct 2026): 2555 placed in a theme and 214 set aside as off-topic or unsafe. X replies are found by search and each one is checked against its public post on X. Last read: 26 Oct 2026, 23:46 UTC. Not every reply is read.

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