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Selected model is at capacity — GPT-5.5, GPT-5.6-Sol, and GPT-6 Astra all failing (only 5.4-mini works), Sep 7 2026 #43398
Description
What version of Codex CLI is running?
codex-cli 0.153.4
What subscription do you have?
Pro 20x ($200)
Which model were you using?
gpt-6-astra,gpt-5.6-sol,gpt-5.6-terra,gpt-5.6-luna,gpt-5.5
What platform is your computer?
Distributor ID: Ubuntu Description: Ubuntu 22.04.5 LTS Release: 22.04 Codename: jammy
What terminal emulator and version are you using (if applicable)?
No response
Codex doctor report
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"git exec path": "/usr/lib/git-core",
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"network.env": {
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"network.provider_reachability": {
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"endpoint": "wss://chatgpt.com/backend-api/<redacted>",
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"details": {
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"goals DB": "/home/shiyou/.codex/goals_1.sqlite (file)",
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"summary": "OS language zh-CN",
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"last checked at": "2026-09-07T02:04:38.351780010Z",
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}
}What issue are you seeing?
Since today (Sep 7, 2026), every model except GPT-5.4-mini fails partway through
execution with "Selected model is at capacity. Please try a different model."
This affects GPT-5.5, GPT-5.6-Sol, and GPT-6 Astra — not just the newly-launched
Astra model. Only the standard (non-high-effort) GPT-5.4-mini currently works
reliably. This started suddenly; everything was working normally last week.
What steps can reproduce the bug?
Uploaded thread: 01a0413e-57a2-77d2-b256-d60591046a46
What is the expected behavior?
Selected model should either execute normally, or the picker should not
offer a model that has insufficient serving capacity.
Additional information
Started: Sep 7, 2026
Duration: ongoing, ~24 hours as of this report
status.openai.com currently shows all systems operational — this does not
appear to be reflected as an official incident yet, despite affecting
multiple model tiers (5.5, 5.6-Sol, Astra) simultaneously, not just the
newly-launched Astra model.
Activity
github-actions commentedon Sep 7, 2026
Potential duplicates detected. Please review them and close your issue if it is a duplicate.
Powered by Codex Action
rowan-fan commentedon Sep 7, 2026
Same problem.
meowameowameow commentedon Sep 7, 2026
Same problem.
zihuan711-netizen commentedon Sep 7, 2026
Same problem.
ylwind commentedon Sep 7, 2026
Same problem.
MMortise commentedon Sep 7, 2026
Same problem.
linxuanweb commentedon Sep 7, 2026
same problem
zhangsq1986 commentedon Sep 7, 2026
Update: gpt-5.6-sol ultra works fine for short tasks (e.g. editing a document),
but fails with the same "Selected model is at capacity" error specifically on
long-running tasks. This suggests the issue may be related to sustained
concurrent connection/slot capacity for this model tier, rather than the model
being entirely unavailable.
medetasi commentedon Sep 7, 2026
Same problem.
aldinokemal commentedon Sep 7, 2026
same problem, what happen?
papermoon717 commentedon Sep 7, 2026
Same problem.
nextdiy commentedon Sep 7, 2026
Same problem.
evanwangace commentedon Sep 7, 2026
Same problem.
chen9071870-spec commentedon Sep 7, 2026
Same problem.
D1a0y1bb commentedon Sep 8, 2026
同样的问题。
cangwuwuwu commentedon Sep 8, 2026
same problem.
mekanuo commentedon Sep 8, 2026
same problem.
BaiFeng666 commentedon Sep 8, 2026
same
protasovse commentedon Sep 8, 2026
This is the second day I've had this problem.
protasovse commentedon Sep 8, 2026
https://chatgpt.com/ has the same issue.
nik343 commentedon Sep 8, 2026
Same problem
chen9071870-spec commentedon Sep 8, 2026
Same problem.
itmyhome commentedon Sep 10, 2026
Same problem.
bkrescaperaseuse commentedon Sep 10, 2026
Same problem. Codex is unusuable atm
Inteluga1 commentedon Sep 16, 2026