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grok 4 fast reasoning is down half of the time
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(204.8, 30%, 29%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EC%3C/text%3E%3C/svg%3E)
Christian
200
Reputation points
I have deployed grok 4 fast reasoning in france central. The model seems great but it's down half of the time. When my app fails I go to the playground and it's the same behaviour. Either "model temporary unavailable" or it just keeps thinking forever.
Azure AI services
{count} votes
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(316.8, 39%, 40%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESM%3C/text%3E%3C/svg%3E)
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Christian 200 Reputation points
2025-10-24T12:32:39.57+00:00 TKM was already at 400k.
Metrics:
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(150.4, 90%, 24%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDJ%3C/text%3E%3C/svg%3E)
Damien Juillard 0 Reputation points2025-10-28T13:19:44.4533333+00:00 Hi,
I experience the same. I cannot increase my quota which is stuck to 50k tpm (because when I try to submit a quota increase request, I cannot see the Grok 4 fast reasoning model in the list, only grok 4 or grok 3).My metrics are the following.
thanks in advance for your support.
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Christian 200 Reputation points
2025-10-28T13:37:58.2733333+00:00 EOD means? End of Day?
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Christian 200 Reputation points
2025-10-30T11:36:48.1733333+00:00 I haven't experienced more errors but the model is EXTREMELY SLOW. Even simple "hi" responses take a minute or more. it's supposed to be one of the fastest reasoning models https://artificialanalysis.ai/?speed=end-to-end-response-time
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(166.4, 57.00000000000001%, 26%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA5%3C/text%3E%3C/svg%3E)
AlbertoCunha-5626 0 Reputation points2025-11-02T14:12:25.8666667+00:00 Can you provider us with the information regarding which regions and services where affected? i'm getting all sorts of problems with grok-4-fast-reasoning
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Christian 200 Reputation points
2025-11-03T15:18:03.4966667+00:00 Still unusable:
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Sridhar M 1,530 Reputation points Microsoft External Staff Moderator
2025-11-04T16:46:43.7666667+00:00 Hi Christian
We have identified the problem, and our technical team is diligently investigating its root cause. Please allow us some time to implement a permanent resolution. Thank you for your understanding.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(6.4, 5%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMC%3C/text%3E%3C/svg%3E)
Mansoor Chikte 0 Reputation points2025-11-05T15:32:49.01+00:00 Still unusable when will the issue get resolved any timeline?
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(89.60000000000001, 46%, 18%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAS%3C/text%3E%3C/svg%3E)
Antonio Soares Couto Neto 0 Reputation points2025-11-05T21:55:56.1866667+00:00 Im also having problems with grok 4 fast reasoning. No updates?
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(28.799999999999997, 15%, 12%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAV%3C/text%3E%3C/svg%3E)
Anshika Varshney 2,315 Reputation points Microsoft External Staff Moderator2025-11-06T08:44:11.1066667+00:00 Hi Christian / Antonio Soares Couto Neto / Mansoor Chikte
Product group is working on it to fix the issue. please wait for a while. Will let you know ASAP.
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Mansoor Chikte 0 Reputation points
2025-11-06T11:07:53.11+00:00 Hi @Anshika Varshney,
Could you please share an updated timeline for when this issue will be resolved? It has been ongoing for a while, and we would appreciate clarity on the expected resolution timeframe.
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Mansoor Chikte 0 Reputation points
2025-11-08T12:04:51.63+00:00 Any update?
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