Get-AzCognitiveServicesModelCapacity does not support querying models with the Format "Mistral AI"

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#29,632 opened on May 19, 2026 0 comments 1 reaction 0 assignees View on GitHub

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Assessment

Difficulty: 2/5
Estimated time: 1-3 hours
Newbie friendliness: 65/100

Issue type: Bug
Clarity: Mostly clear
Activity status: Quiet
Tech stack: csharp, powershell
Domain: cli

Research direction

Start at the Get-AzCognitiveServicesModelCapacity cmdlet and inspect how the ModelFormat parameter is validated, using the reported Mistral AI command as the reproducer. Compare it with the successful Invoke-AzRestMethod request. Done means formats containing spaces are accepted and the cmdlet returns the expected model capacity results.

Written by the indexing model from the issue text.

Description

bug customer-reported

Description

Running the follow command produces an error about an unmatched regex pattern in ModelFormat:

Get-AzCognitiveServicesModelCapacity -Location 'eastus2' -Format 'Mistral AI' -Name 'mistral-document-ai-2512' -Version '1'

Invoking the ARM API endpoint directly produces no error and returns expected results:

Invoke-AzRestMethod -Method GET -Uri 'https://management.azure.com/subscriptions/<SUBSCRIPTION ID>/providers/Microsoft.CognitiveServices/locations/eastus2/modelCapacities?api-Version=2026-01-15-preview&modelFormat=Mistral AI&modelName=mistral-document-ai-2512&modelVersion=1'

StatusCode : 200
Content    : {
               "value": [
                 {
                   "id": "/subscriptions/<SUBSCRIPTION ID>/providers/Microsoft.CognitiveServices/locations/eastus2/models/Mistral AI.mistral-document-ai-2512.1/skuCapacities/GlobalStandard",
                   "type": "Microsoft.CognitiveServices/locations/models/skuCapacities",
                   "name": "GlobalStandard",
                   "location": "eastus2",
                   "properties": {
                     "model": {
                       "format": "Mistral AI",
                       "name": "mistral-document-ai-2512",
                       "version": "1"
                     },
                     "skuName": "GlobalStandard",
                     "availableCapacity": 60,
                     "scopeType": "Classic",
                     "scopeId": "eastus2"
                   }
                 },
                 {
                   "id": "/subscriptions/<SUBSCRIPTION ID>/providers/Microsoft.CognitiveServices/locations/eastus2/models/Mistral AI.mistral-document-ai-2512.1/skuCapacities/DataZoneStandard",
                   "type": "Microsoft.CognitiveServices/locations/models/skuCapacities",
                   "name": "DataZoneStandard",
                   "location": "eastus2",
                   "properties": {
                     "model": {
                       "format": "Mistral AI",
                       "name": "mistral-document-ai-2512",
                       "version": "1"
                     },
                     "skuName": "DataZoneStandard",
                     "availableCapacity": 40,
                     "scopeType": "Classic",
                     "scopeId": "eastus2"
                   }
                 }
               ]
             }
Headers    : {
               "Cache-Control": "no-cache",
               "Pragma": "no-cache",
               "X-Content-Type-Options": "nosniff",
               "x-ms-request-id": "",
               "x-envoy-upstream-service-time": "109",
               "x-ms-operation-identifier": "",
               "x-ms-ratelimit-remaining-subscription-reads": "249",
               "x-ms-ratelimit-remaining-subscription-global-reads": "3749",
               "x-ms-correlation-request-id": "",
               "x-ms-routing-request-id": "",
               "Strict-Transport-Security": "max-age=31536000; includeSubDomains",
               "X-Cache": "CONFIG_NOCACHE",
               "X-MSEdge-Ref": "Ref A:  Ref B:  Ref C: 2026-05-19T14:18:50Z",
               "Date": "Tue, 19 May 2026 14:18:50 GMT"
             }
Method     : GET
RequestUri : https://management.azure.com/subscriptions/<SUBSCRIPTION ID>/providers/Microsoft.CognitiveServices/locations/eastus2/modelCapacities?api-Version=2026-01-15-preview&modelFormat=Mistral AI&modelName=mistral-document-ai-2512&modelVersion=1
Version    : 1.1

The cmdlet does not support ModelFormat values that include a space, but the ModelFormat value for Mistral includes a space:

Get-AzCognitiveServicesModel -Location 'eastus2' | Where { $_.ModelProperty.Name -eq 'mistral-document-ai-2512' } | Select -Expand ModelProperty -First 1    

BaseModel            : 
IsDefaultVersion     : False
Skus                 : {GlobalStandard, DataZoneStandard}
MaxCapacity          : 3
Capabilities         : {[chatCompletion, false], [area, US]}
FinetuneCapabilities : 
Deprecation          : Microsoft.Azure.Management.CognitiveServices.Models.ModelDeprecationInfo
LifecycleStatus      : Stable
SystemData           : Microsoft.Azure.Management.CognitiveServices.Models.SystemData
Publisher            : Mistral AI
Format               : Mistral AI
Name                 : mistral-document-ai-2512
Version              : 1
Source               : 
SourceAccount        : 
CallRateLimit        :

Issue script & Debug output

PS> Get-AzCognitiveServicesModelCapacity -Location eastus2 -Format 'Mistral AI' -Name 'mistral-document-ai-2512' -Version '1' -Debug
DEBUG: 10:09:33 AM - [ConfigManager] Got nothing from [DisplaySecretsWarning], Module = [], Cmdlet = []. Returning default value [True].
DEBUG: 10:09:33 AM - GetAzureCognitiveServicesModelCapacityCommond begin processing with ParameterSet 'DefaultParameterSet'.
DEBUG: 10:09:33 AM - using account id '<USER ID>'...
DEBUG: 10:09:33 AM - [ConfigManager] Got nothing from [DisplayBreakingChangeWarning], Module = [Az.CognitiveServices], Cmdlet = [Get-AzCognitiveServicesModelCapacity]. Returning default value [True].
DEBUG: [Common.Authentication]: Authenticating using Account: '<USER ID>', environment: 'AzureCloud', tenant: '<TENANT ID>'
DEBUG: 10:09:33 AM - [ConfigManager] Got nothing from [DisableInstanceDiscovery], Module = [], Cmdlet = []. Returning default value [False].
DEBUG: 10:09:33 AM - [ConfigManager] Got [False] from [EnableLoginByWam], Module = [], Cmdlet = [].
DEBUG: 10:09:33 AM - [SilentAuthenticator] Calling SharedTokenCacheCredential.GetTokenAsync - TenantId:'<TENANT ID>', Scopes:'https://management.core.windows.net//.default', AuthorityHost:'https://login.microsoftonline.com/', UserId:'<USER ID>'
DEBUG: SharedTokenCacheCredential.GetToken invoked. Scopes: [ https://management.core.windows.net//.default ] ParentRequestId: 
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z - <SESSION ID>] ==== GetAccounts started - GetAccounts ====
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z - <SESSION ID>] Account id filter: False
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z] [Internal cache] Clearing user token cache accessor.
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z] [Internal cache] Total number of cache partitions found while getting refresh tokens: 1. PartitionKey  False
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z] [Internal cache] Total number of cache partitions found while getting accounts: 1. PartitionKey  False
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z - <SESSION ID>] IsLegacyAdalCacheEnabled: yes
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z - <SESSION ID>] [Region discovery] Not using a regional authority. 
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z - <SESSION ID>] [Region discovery] Not using a regional authority. 
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z - <SESSION ID>] IsLegacyAdalCacheEnabled: yes
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z - <SESSION ID>] IsLegacyAdalCacheEnabled: yes
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z] Found 1 cache accounts and 0 broker accounts
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z] Returning 1 accounts
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z - <CORRELATION ID>] MSAL MSAL.CoreCLR with assembly version '4.82.1.0'. CorrelationId(<CORRELATION ID>)
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z - <CORRELATION ID>] === AcquireTokenSilent Parameters ===
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z - <CORRELATION ID>] LoginHint provided: False
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z - <CORRELATION ID>] Account provided: True
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z - <CORRELATION ID>] ForceRefresh: False
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z - <CORRELATION ID>] 
=== Request Data ===
Authority Provided? - True
Scopes - https://management.core.windows.net//.default
Extra Query Params Keys (space separated) - 
ApiId - AcquireTokenSilent
IsConfidentialClient - False
SendX5C - False
LoginHint ? False
IsBrokerConfigured - False
HomeAccountId - False
CorrelationId - <CORRELATION ID>
UserAssertion set: False
LongRunningOboCacheKey set: False
Region configured: 
FMI Path: 
Credential FMI Path: 

DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z - <CORRELATION ID>] === Token Acquisition (SilentRequest) started:
         Scopes: https://management.core.windows.net//.default
        Authority Host: login.microsoftonline.com
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z] [Internal cache] Clearing user token cache accessor.
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z - <CORRELATION ID>] [Internal cache] Total number of cache partitions found while getting access tokens: 1
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z - <CORRELATION ID>] [FindAccessTokenAsync] Discovered 9 access tokens in cache using partition key: <PRINCIPAL ID>.<TENANT ID>
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z - <CORRELATION ID>] [Region discovery] Not using a regional authority. 
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z - <CORRELATION ID>] Access token is not expired. Returning the found cache entry. [Current time (05/19/2026 14:09:33) - Expiration Time (05/19/2026 15:01:57 +00:00) - Extended Expiration Time (05/19/2026 15:01:57 +00:00)]
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z - <CORRELATION ID>] Returning access token found in cache. RefreshOn exists ? False
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z - <CORRELATION ID>] [Region discovery] Not using a regional authority. 
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z - <CORRELATION ID>] 
        === Token Acquisition finished successfully:
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z - <CORRELATION ID>]  AT expiration time: 5/19/2026 3:01:57 PM +00:00, scopes: https://management.core.windows.net//.default https://management.core.windows.net//user_impersonation. source: Cache
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z - <CORRELATION ID>] 
[LogMetricsFromAuthResult] Cache Refresh Reason: NotApplicable
[LogMetricsFromAuthResult] DurationInCacheInMs: 0
[LogMetricsFromAuthResult] DurationTotalInMs: 4
[LogMetricsFromAuthResult] DurationInHttpInMs: 0
DEBUG: False MSAL 4.82.1.0 MSAL.CoreCLR .NET 10.0.6 Microsoft Windows 10.0.26200 [2026-05-19 14:09:33Z - <CORRELATION ID>] TokenEndpoint: ****
DEBUG: SharedTokenCacheCredential.GetToken succeeded. Scopes: [ https://management.core.windows.net//.default ] ParentRequestId:  ExpiresOn: 2026-05-19T15:01:57.0000000+00:00
DEBUG: [Common.Authentication]: Received token with LoginType 'User', Tenant: '<TENANT ID>', UserId: '<USER ID>'
DEBUG: 10:09:33 AM - [ConfigManager] Got nothing from [EnableErrorRecordsPersistence], Module = [Az.CognitiveServices], Cmdlet = [Get-AzCognitiveServicesModelCapacity]. Returning default value [False].
Get-AzCognitiveServicesModelCapacity: 'modelFormat' does not match expected pattern '^[a-zA-Z0-9][a-zA-Z0-9_.-]*$'.
DEBUG: 10:09:33 AM - [ConfigManager] Got nothing from [DisplayBreakingChangeWarning], Module = [Az.CognitiveServices], Cmdlet = [Get-AzCognitiveServicesModelCapacity]. Returning default value [True].
DEBUG: 10:09:33 AM - [ConfigManager] Got nothing from [DisplayRegionIdentified], Module = [], Cmdlet = []. Returning default value [True].
DEBUG: 10:09:33 AM - [ConfigManager] Got nothing from [CheckForUpgrade], Module = [], Cmdlet = []. Returning default value [True].
DEBUG: 10:09:33 AM - No authentication telemetry is found for the current cmdlet with Id 01600ad5-b731-466c-b524-aadaf3723fc2.
DEBUG: AzureQoSEvent:  Module: Az.CognitiveServices:1.16.0; CommandName: Get-AzCognitiveServicesModelCapacity; PSVersion: 7.6.1; IsSuccess: False; Duration: 00:00:00.0567155; SanitizeDuration: 00:00:00; Exception: 'modelFormat' does not match expected pattern '^[a-zA-Z0-9][a-zA-Z0-9_.-]*$'.;
DEBUG: 10:09:33 AM - [ConfigManager] Got [False] from [EnableDataCollection], Module = [], Cmdlet = [].
DEBUG: 10:09:33 AM - GetAzureCognitiveServicesModelCapacityCommond end processing.

Environment data

PS> $PSVersionTable

Name                           Value
----                           -----
PSVersion                      7.6.1
PSEdition                      Core
GitCommitId                    7.6.1
OS                             Microsoft Windows 10.0.26200
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.4
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

Module versions

PS> Get-Module Az*

ModuleType Version    PreRelease Name                                ExportedCommands
---------- -------    ---------- ----                                ----------------
Script     5.3.3                 Az.Accounts                         
Script     1.16.0                Az.CognitiveServices

Error output

PS> Resolve-AzError

   HistoryId: 2

Message        : 'modelFormat' does not match expected pattern '^[a-zA-Z0-9][a-zA-Z0-9_.-]*$'.
StackTrace     :    at Microsoft.Azure.Management.CognitiveServices.LocationBasedModelCapacitiesOperations.ListWithHttpMessagesAsync(String location, String modelFormat, String modelName, String modelVersion, Dictionary`2 customHeaders, CancellationToken cancellationToken)
                    at Microsoft.Azure.Management.CognitiveServices.LocationBasedModelCapacitiesOperationsExtensions.ListAsync(ILocationBasedModelCapacitiesOperations operations, String location, String modelFormat, String modelName, String modelVersion, CancellationToken cancellationToken)
                    at Microsoft.Azure.Management.CognitiveServices.LocationBasedModelCapacitiesOperationsExtensions.List(ILocationBasedModelCapacitiesOperations operations, String location, String modelFormat, String modelName, String modelVersion)
                    at Microsoft.Azure.Commands.Management.CognitiveServices.CognitiveServicesAccountBaseCmdlet.ListAll[T](Func`5 listFirst, String para0, String para1, String para2, String para3, Func`2 listNext)
                    at Microsoft.Azure.Commands.Management.CognitiveServices.GetAzureCognitiveServicesModelCapacityCommond.<ExecuteCmdlet>b__17_0()
                    at Microsoft.Azure.Commands.Management.CognitiveServices.CognitiveServicesAccountBaseCmdlet.RunCmdLet(Action action)
                    at Microsoft.Azure.Commands.Management.CognitiveServices.GetAzureCognitiveServicesModelCapacityCommond.ExecuteCmdlet()
                    at Microsoft.WindowsAzure.Commands.Utilities.Common.CmdletExtensions.<>c__3`1.<ExecuteSynchronouslyOrAsJob>b__3_0(T c)
                    at Microsoft.WindowsAzure.Commands.Utilities.Common.CmdletExtensions.ExecuteSynchronouslyOrAsJob[T](T cmdlet, Action`1 executor)
                    at Microsoft.WindowsAzure.Commands.Utilities.Common.CmdletExtensions.ExecuteSynchronouslyOrAsJob[T](T cmdlet)
                    at Microsoft.WindowsAzure.Commands.Utilities.Common.AzurePSCmdlet.ProcessRecord()
Exception      : Microsoft.Rest.ValidationException
InvocationInfo : {Get-AzCognitiveServicesModelCapacity}
Line           : Get-AzCognitiveServicesModelCapacity -Location eastus2 -Format 'Mistral AI' -Name 'mistral-document-ai-2512' -Version '1'
Position       : At line:1 char:1
                 + Get-AzCognitiveServicesModelCapacity -Location eastus2 -Format 'Mistr …
                 + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
HistoryId      : 2

Dominant language: C#
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More C# issues

Get-AzCognitiveServicesModelCapacity does not support querying models with the Format "Mistral AI"

Assessment

Research direction

Description

Description

Issue script & Debug output

Environment data

Module versions

Error output

Contributor guide

First steps

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