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Azure OpenAI models are continually refreshed with newer and more capable models. As part of this process, we deprecate and retire older models. This article provides information about models that are currently available, deprecated, and retired.

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Model availability

For the availability of models, see the following information:
  • Generally Available (GA) model versions will be available for a minimum of 12 months.
  • After 12 months, existing customers may continue to use older model versions for an additional six months.
  • New customers who have never deployed the older model version will no longer have access after 12 months.
  • For global deployments, all future model versions starting with gpt-4o and gpt-4 0409 will be available with their (N) next succeeding model (N+1) for comparison together.
  • Customers have 60 days to try out a new GA model in at least one global or standard region before any upgrades happen to a newer GA model.

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Terminology

  • Deprecation: When a model is deprecated, it’s no longer available for new customers. It continues to be available for use by customers who have existing deployments until the model is retired.
  • Retirement: When a model is retired, it’s no longer available for use. Azure OpenAI deployments of a retired model always return error responses.

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Notifications

Azure OpenAI notifies customers of active Azure OpenAI deployments for models with upcoming retirements. We notify customers of upcoming retirements for each deployment in the following ways:
  • We notify customers at model launch by programmatically designating a not sooner than retirement date. For preview models, it’s 90-120 days from launch. For generally available (GA) models, it’s 365 days from launch.
  • We provide customers with at least 60 days’ notice before model retirement for GA models.
  • We provide customers with least 30 days’ notice before preview model version upgrades.
Retirements are done on a rolling basis, region by region. There’s no schedule for when a specific region or SKU is upgraded.

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Notifications of upcoming retirements

Azure OpenAI notifies customers via two methods:
  • Azure Resource Health: Anyone with reader permissions or higher can see Azure health alerts and configure personalized alerts via email and SMS. See Create Service Health alerts.
  • Email: Email notifications are automatically sent to subscription owners. However, any individual with reader permissions can configure their own alerts by following the previous guidance.

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Azure Service Health filter configuration

The service is azure OpenAI service. (The casing reflects the current UX experience.) Event types include:
  • Health advisories = Upgrade, Deprecation, & Retirement Notifications.
  • Service issue = Outages. (We recommend this event type only if you want to be notified of outages.)
If you want to receive SMS text-based alerts versus just emails, select Create action group. Then, under Notification type, select Email/SMS message/Push/Voice and configure your phone number.

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Considerations for Azure public cloud

Be aware of the following information:
  • Not all model version combinations will be available in all regions.
  • Model version N and N+1 might not always be available in the same region.
  • A GA model version N might upgrade to a future model version N+X in some regions based on capacity limitations, and without the new model version N+X separately being available to test in the same region. The new model version will be available to test in other regions before any upgrades are scheduled.
  • Preview model versions and GA versions of the same model won’t always be available to test together in the same region. There will be preview and GA versions available to test in different regions.
  • We reserve the right to limit future customers’ use of a particular region to balance service quality for existing customers.
  • As always at Microsoft, security is of the utmost importance. If a model or model version is found to have compliance or security issues, we reserve the right to invoke the need to do emergency retirements. Refer to the terms of service for more information.

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Special considerations for Azure Government clouds

  • Global standard deployments aren’t available in government clouds.
  • Not all models or model versions available in commercial and public clouds will be available in government clouds.
  • In Azure Government clouds, we intend to support only one version of a given model at a time. For example, only one version of gpt-35-turbo 0125 and gpt-4o (2024-05-13).
  • However, there’s a 30-day overlap between new model versions, when more than two will be available. For example, if gpt-35-turbo 0125 or gpt-4o (2024-05-13) is updated to a future version. Another example is model family changes beyond version updates, like when moving from gpt-4 1106-preview to gpt-4o (2024-05-13).

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Preparation for model retirements and version upgrades

To prepare for model retirements and version upgrades, we recommend that customers test their applications with the new models and versions and evaluate their behavior. We also recommend that customers update their applications to use the new models and versions before the retirement date. For more information on the model evaluation process, see the Getting started with model evaluation blog post. For information on the model upgrade process, see How to upgrade to a new model or version. For more information on how to manage model upgrades and migrations for provisioned deployments, see Managing models on provisioned deployment types.

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Current models

Not all models go through a deprecation period before retirement. Some models or versions only have a retirement date.Fine-tuned models are subject to a different deprecation and retirement schedule from their equivalent base model.
These models are currently available for use in Azure OpenAI.

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Text generation

Model NameModel Version1Lifecycle StatusDeprecation Date (No New Customers)Retirement DateReplacement Model
gpt-5-chat2025-08-07Previewn/a2026-04-15gpt-5.3-chat
gpt-5-chat2025-10-03Previewn/a2026-04-15gpt-5.3-chat
gpt-5.3-chat2025-12-11Previewn/a2026-06-01
gpt-4o2024-05-13Generally Available2025-05-13Standard deployment type retires on 2026-03-31, with auto-upgrades scheduled to start on 2026-03-09. For other deployment types, including ALL Provisioned, Global Standard, and Data Zone Standard, the retirement date has been moved to 2026-10-01.gpt-5.1
gpt-4o2024-08-06Generally Available2025-08-06Standard deployment type retires on 2026-03-31, with auto-upgrades scheduled to start on 2026-03-09. For other deployment types, including ALL Provisioned, Global Standard, and Data Zone Standard, the retirement date has been moved to 2026-10-01.gpt-5.1
gpt-4o2024-11-20Generally Available2025-11-202026-10-01gpt-5.1
gpt-4o-mini2024-07-18Generally Available2025-07-18Standard deployment type retires on 2026-03-31, with auto-upgrades scheduled to start on 2026-03-09. For other deployment types, including ALL Provisioned, Global Standard, and Data Zone Standard, the retirement date has been moved to 2026-10-01.gpt-4.1-mini
gpt-4.12025-04-14Generally Available2026-04-142026-10-14gpt-5
gpt-4.1-mini2025-04-14Generally Available2026-04-142026-10-14gpt-5-mini
gpt-4.1-nano2025-04-14Generally Available2026-04-142026-10-14gpt-5-nano
computer-use-preview2025-03-11Previewn/aNo earlier than 2026-04-14
o12024-12-17Generally Available2025-12-172026-07-15o3
o1-pro2025-03-19Generally Available2026-03-192026-09-18o3-pro
o3-mini2025-01-31Generally Available2026-01-312026-08-02o4-mini
o32025-04-16Generally Available2026-04-162026-10-16
o3-pro2025-06-10Generally Available2026-06-102026-12-10
o3-deep-research2025-06-26Generally Available2026-06-262026-12-26
o4-mini2025-04-16Generally Available2026-04-162026-10-16
codex-mini2025-05-16Generally Available2026-05-162026-11-15
model-router2025-11-18Generally Available2026-11-182027-05-20
gpt-5-mini2025-08-07Generally Available2026-08-072027-02-06
gpt-5-nano2025-08-07Generally Available2026-08-072027-02-06
gpt-5-codex2025-09-15Generally Available2026-09-152027-03-17
gpt-5-pro2025-10-06Generally Available2026-10-062027-04-07
gpt-5.12025-11-13Generally Available2026-11-132027-05-15
gpt-5.1-codex2025-11-13Generally Available2026-11-132027-05-15
gpt-5.1-codex-mini2025-11-13Generally Available2026-11-132027-05-15
gpt-5.1-chat2025-11-13Previewn/aNo earlier than 2026-03-31
gpt-5.22025-12-11Generally AvailableNo earlier than 2026-12-12No earlier than 2027-05-12
gpt-5.2-chat2025-12-11Previewn/aNo earlier than 2026-04-01
gpt-5.2-codex2026-01-14Generally Available2027-01-142027-07-14gpt-5.3-codex
gpt-5.3-codex2026-02-24Generally Available2027-02-252027-08-25
gpt-5.42026-03-05Generally Available2027-03-052027-09-05
gpt-5.4-pro2026-03-05Generally Available2027-03-052027-09-05
1 For some models, the launch date is used as the value of the model version. We notify all customers with these preview deployments at least 30 days before the start of the upgrades. We publish an upgrade schedule that details the order of regions and model versions that we follow during the upgrades, and link to that schedule from here.
Will a model upgrade happen if the new model version isn’t yet available in that region?Yes, even in cases where the latest model version isn’t yet available in a region, we automatically upgrade deployments during the scheduled upgrade window. For more information, see Azure OpenAI model versions.

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Fine-tuned models

Fine-tuned models retire in two phases: training and deployment. Unless explicitly stated, training retires no earlier than the base model retirement date. After a model is retired for training, it’s no longer available for fine-tuning but any models you’ve trained remain available for deployment. At deployment retirement, inference and deployment return error responses.
ModelVersionTraining retirement dateDeployment retirement date
gpt-4o2024-08-06No earlier than 2027-04-0112027-10-01
gpt-4o-mini2024-07-18No earlier than 2027-04-0112027-10-01
gpt-4.12025-04-14No earlier than 2027-04-1412027-10-14
gpt-4.1-mini2025-04-14No earlier than 2027-04-1412027-10-14
gpt-4.1-nano2025-04-14No earlier than 2027-04-1412027-10-14
o4-mini2025-04-16Base model retirementOne year after training retirement
1 For existing customers only. Otherwise, training retirement occurs at base model retirement.

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Default model versions

ModelCurrent default versionNew default versionDefault upgrade date
gpt-4o2024-08-06--

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Retirement and deprecation history

To track individual updates to this article, refer to the Git history. For a list of retired models, refer to the retired models page.