{"type":"error","status":400,"error":{"type":"invalid_request_error","message":"The 'gpt-5.3-codex-spark' model is not supported when using Codex with a ChatGPT account."}}

Potential duplicates detected. Please review them and close your issue if it is a duplicate.

• #17359

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This model is currently supported only for Pro subscriptions. Are you sure you're currently on a pro subscription? Perhaps the subscription lapsed, and you've fallen back to the free tier?

Same issue here. Paid user of Plus subscription and today suddenly I got this message but in my case with a different model.

{"type":"error","status":400,"error":{"type":"invalid_request_error","message":"The 'gpt-5.3-codex' model is not supported when using Codex with a ChatGPT account."}}

Potential "Claude Code only" user here xD

Same issue here. Plus subscription, using codex in VS Code

{"type":"error","status":400,"error":{"type":"invalid_request_error","message":"The 'gpt-5.3-codex' model is not supported when using Codex with a ChatGPT account."}}

Same here - I am a paid user (£20 a month) and suddenly there is no option to choose the model with Codex, and I get the error:

{"type":"error","status":400,"error":{"type":"invalid_request_error","message":"The 'gpt-5.3-codex' model is not supported when using Codex with a ChatGPT account."}}

<img width="819" height="272" alt="Image" src="https://github.com/user-attachments/assets/17b69fbf-0829-444d-9b70-bf131e4ed555" />

From Codex:

<img width="355" height="165" alt="Image" src="https://github.com/user-attachments/assets/912761fb-fbd8-467a-aa20-22446f0a0195" />

From intelliJ:

<img width="937" height="713" alt="Image" src="https://github.com/user-attachments/assets/407063d5-45d1-437a-9a59-dede5bc77b41" />

On IntelliJ I changed the model to GPT-5.4-medium and it started working again and in Codex I also changed the model and it started working.

I'm guessing this is a policy change issue and we no longer get access to gpt-5.3-codex.

Why would people leave a working Codex with the 5.3 model when there's a bug with the incorrect limit being used? They'll also make money on loans, don't you understand?
PS: I lost 15% of my 5-hour limit in a 2-minute request in Codex 5.4, what a joke...

+1, gpt-5.3-codex' model is not supported when using Codex with a ChatGPT account.

■ {"type":"error","status":400,"error":{"type":"invalid_request_error","message":"The 'gpt-5.3-codex' model is not supported when using Codex with a ChatGPT account."}}

/status

╭───────────────────────────────────────────────────────────────────────────────────────╮
│  >_ OpenAI Codex (v0.136.0)                                                           │
│                                                                                       │
│ Visit https://chatgpt.com/codex/settings/usage for up-to-date                         │
│ information on rate limits and credits                                                │
│                                                                                       │
│  Model:                       gpt-5.3-codex (reasoning xhigh, summaries auto)         │
│  Directory:                   /home/vp/bot4shops                                      │
│  Permissions:                 Full Access                                             │
│  Agents.md:                   AGENTS.md                                               │
│  Account:                     commonvibe@protonmail.com (Pro Lite)                    │
│  Collaboration mode:          Default                                                 │
│  Session:                     019e8d80-2524-7d20-90d8-1f7b73ab7e0d                    │
│                                                                                       │
│  Context window:              100% left (0 used / 250K)                               │
│  5h limit:                    [████████████████████] 100% left (resets 20:40)         │
│  Weekly limit:                [░░░░░░░░░░░░░░░░░░░░] 0% left (resets 18:42 on 7 Jun)  │
│  GPT-5.3-Codex-Spark limit:                                                           │
│  5h limit:                    [████████████████░░░░] 80% left (resets 16:12)          │
│  Weekly limit:                [█████████████████░░░] 85% left (resets 12:19 on 8 Jun) │
╰───────────────────────────────────────────────────────────────────────────────────────╯

Using pro account and i have same issues on gpt-5.3-codex-spark

UPDATE: I managed to fix it by reseting the config.toml file and switching to gpt5-4-mini and then back to gpt-5.3-codex-spark.

This model is currently supported only for Pro subscriptions. Are you sure you're currently on a pro subscription? Perhaps the subscription lapsed, and you've fallen back to the free tier?

@etraut-openai
No, it is not, I am getting the same error with the 5.3-codex:
{"type":"error","status":400,"error":{"type":"invalid_request_error","message":"The 'gpt-5.3-codex' model is not supported when using Codex with a ChatGPT account."}}

<img width="360" height="759" alt="Image" src="https://github.com/user-attachments/assets/54cce5ca-4281-4033-ab62-4ca4ac556880" />

@alienforhumans, the 5.2 and 5.3-codex models have been retired. You'll need to switch to a newer model.

@alienforhumans, the 5.2 and 5.3-codex models have been retired. You'll need to switch to a newer model.

So the older codex model is retired and newer model is now only for the Pro account? So I can't use Codex in my Plus subscription, which says I do have access to codex, right @etraut-openai ?

guys they've retired the old model for subscription users, codex still works on plus you just need to type /model and pick the newer model.

@dediweb You can't use Codex-specific models like GPT-5.3-codex and there are no *-codex models for the 5.4 or 5.5.
https://openai.com/index/introducing-gpt-5-3-codex/
*-codex models where created for better coding purposes, but now we can't use these models and there are no any analogs in newer models for that and this is the problem, because this is the main reason Codex users pays for their subscriptions