add GitHub Copilot app support for auto model selection (#62075)

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Jenni C <97056108+dihydroJenoxide@users.noreply.github.com>

Author: 3 people

content/copilot/concepts/models/auto-model-selection.md

@@ -19,7 +19,7 @@ More than just a model picker, {% data variables.copilot.copilot_auto_model_sele
 
 ### Auto with task optimization
 
-> [!NOTE] {% data variables.copilot.copilot_auto_model_selection_short_cap_a %} with task optimization is generally available in {% data variables.copilot.copilot_chat_short %} on the {% data variables.product.github %} website, in {% data variables.product.prodname_vscode_shortname %}, and in {% data variables.copilot.copilot_cli_short %}.
+> [!NOTE] {% data variables.copilot.copilot_auto_model_selection_short_cap_a %} with task optimization is generally available in {% data variables.copilot.copilot_chat_short %} on the {% data variables.product.github %} website, in {% data variables.product.prodname_vscode_shortname %}, in {% data variables.copilot.copilot_cli_short %}, and in {% data variables.copilot.github_copilot_app %}.
 
 {% data variables.copilot.copilot_auto_model_selection_short_cap_a %} with task optimization combines two systems to provide high quality results and better reliability. One system tracks real-time system health and availability, while the other evaluates task complexity. Putting these together, {% data variables.copilot.copilot_auto_model_selection_short %} routes the task to the optimal model.
 
@@ -60,22 +60,23 @@ When you select **Auto**, {% data variables.copilot.copilot_auto_model_selection
 
 ## {% data variables.copilot.copilot_auto_model_selection_short_cap_a %} in {% data variables.product.prodname_copilot_short %}
 
-{% data variables.copilot.copilot_auto_model_selection_short_cap_a %}, optimized for model reliability and availability, is available in these {% data variables.product.prodname_copilot_short %} products:
+{% data variables.copilot.copilot_auto_model_selection_short_cap_a %}, with task optimization, is generally available in these {% data variables.product.prodname_copilot_short %} products:
 * {% data variables.copilot.copilot_chat_short %}, on the {% data variables.product.github %} website and supported IDEs
 * {% data variables.copilot.copilot_cli_short %}
 * {% data variables.copilot.copilot_cloud_agent %}
+* {% data variables.copilot.github_copilot_app %}
 
 > [!TIP]
 > You can see which model was used for each {% data variables.product.prodname_copilot_short %} response.
 > * In **{% data variables.copilot.copilot_chat_short %}**, hover over the response.
 > * In **{% data variables.copilot.copilot_cli_short %}**, the model used for each response displays in the terminal.
 > * In **{% data variables.copilot.copilot_cloud_agent %}**, the model used for each response displays at the end of the response.
+> * In **{% data variables.copilot.github_copilot_app %}**, the model used for each response is shown by the model picker next to **Auto**.
 
-### {% data variables.copilot.copilot_chat_short %} on {% data variables.product.github %} and in IDEs
+### {% data variables.copilot.copilot_chat_short %} in IDEs
 
 {% data variables.copilot.copilot_auto_model_selection_short_cap_a %}, with task optimization, is generally available in the following IDEs:
   * {% data variables.product.prodname_vscode_shortname %}
-  * {% data variables.product.github %} website
 
 {% data variables.copilot.copilot_auto_model_selection_short_cap_a %}, optimized for model reliability and availability, is generally available in the following IDEs:
   * JetBrains IDEs

content/copilot/how-tos/github-copilot-app/agent-sessions.md

@@ -19,8 +19,8 @@ Each session in the {% data variables.copilot.github_copilot_app %} runs in its
 
 1. In the sidebar next to **Sessions**, click **+** to start a new session.
 1. Choose a repository—you can use a local folder, choose from {% data variables.product.github %}, or clone from a URL.
-1. From the dropdown under the prompt box, choose where the session should run: in a new working tree, in your local repository, or in a cloud sandbox. Cloud sandboxes for {% data variables.product.prodname_copilot_short %} (public preview) are fully isolated environments hosted by {% data variables.product.github %}. For more information, see [AUTOTITLE](/copilot/concepts/about-cloud-and-local-sandboxes).
-1. Select a session mode, model, and reasoning effort from the dropdowns below the prompt field.
+1. From the dropdown under the prompt box, choose where the session should run: in a new working tree, in your local repository, or in a cloud sandbox. Cloud sandboxes for {% data variables.product.prodname_copilot_short %} (public preview) are fully isolated environments hosted by {% data variables.product.github %}.
+1. Select a session mode, model, and reasoning effort from the dropdowns below the prompt field. If you choose **Auto** for the model, the app selects the optimal model for your task based on task complexity.
 1. Describe the task in the prompt field. You can reference issues with `#`, add files with `@`, or use `/` for commands.
 
 The agent starts working. Your active sessions appear in the sidebar grouped by repository—click any session to switch to it.
@@ -35,7 +35,9 @@ The session mode controls how much autonomy the agent has. You can set the mode
 
 ## Choosing a model
 
-You can select a model and reasoning effort from the dropdowns above the prompt field. Higher reasoning effort gives the agent more time to think through complex problems but may take longer. You can change both settings at any time during a session.
+You can select a model and reasoning effort from the dropdowns below the prompt field. Higher reasoning effort gives the agent more time to think through complex problems but may take longer. You can change both settings at any time during a session.
+
+If you choose **Auto** in the model picker, the app automatically selects the optimal model for your task based on task complexity. After the session starts, the picker next to **Auto** shows which model handled each response. For more information, see [AUTOTITLE](/copilot/concepts/auto-model-selection).
 
 If you configured your own model provider in the app, those models also appear in the picker. For setup steps, see [AUTOTITLE](/copilot/how-tos/github-copilot-app/use-byok-models).
 

content/copilot/reference/ai-models/supported-models.md

@@ -52,10 +52,10 @@ This table lists the supported AI models for {% data variables.copilot.copilot_a
 
 {% rowheaders %}
 
-| Model | {% data variables.copilot.copilot_cloud_agent %} | {% data variables.copilot.copilot_chat_short %} | {% data variables.copilot.copilot_cli_short %} |
-| --- | --- | --- | --- |
+| Model | {% data variables.copilot.copilot_cloud_agent %} | {% data variables.copilot.copilot_chat_short %} | {% data variables.copilot.copilot_cli_short %} | {% data variables.copilot.github_copilot_app %} |
+| --- | --- | --- | --- | --- |
 | {% for model in tables.copilot.auto-model-selection %} |
-| {{ model.name }} | {% if model.cloud_agent == true %}{% octicon "check" aria-label="Included" %}{% else %}{% octicon "x" aria-label="Not included" %}{% endif %} | {% if model.chat == true %}{% octicon "check" aria-label="Included" %}{% else %}{% octicon "x" aria-label="Not included" %}{% endif %} | {% if model.cli == true %}{% octicon "check" aria-label="Included" %}{% else %}{% octicon "x" aria-label="Not included" %}{% endif %} |
+| {{ model.name }} | {% if model.cloud_agent == true %}{% octicon "check" aria-label="Included" %}{% else %}{% octicon "x" aria-label="Not included" %}{% endif %} | {% if model.chat == true %}{% octicon "check" aria-label="Included" %}{% else %}{% octicon "x" aria-label="Not included" %}{% endif %} | {% if model.cli == true %}{% octicon "check" aria-label="Included" %}{% else %}{% octicon "x" aria-label="Not included" %}{% endif %} | {% if model.app == true %}{% octicon "check" aria-label="Included" %}{% else %}{% octicon "x" aria-label="Not included" %}{% endif %} |
 | {% endfor %} |
 
 {% endrowheaders %}

content/copilot/reference/copilot-billing/request-based-billing-legacy/model-multipliers-for-annual-plans.md

@@ -37,7 +37,7 @@ The following table shows the model multipliers per supported model.
 > * {% data variables.copilot.copilot_gpt_54_mini %}
 > * The multiplier for {% data variables.copilot.copilot_mai_code_1_flash %} is a promotional rate.
 > 
-> If you use {% data variables.copilot.copilot_auto_model_selection_short %} in {% data variables.copilot.copilot_chat_short %}, {% data variables.copilot.copilot_cli_short %}, or {% data variables.copilot.copilot_cloud_agent %}, you qualify for a 10% discount. For example, if a model has a multiplier of 1x you'll be billed at 0.9x instead.
+> If you use {% data variables.copilot.copilot_auto_model_selection_short %} in {% data variables.copilot.copilot_chat_short %}, {% data variables.copilot.copilot_cli_short %}, {% data variables.copilot.github_copilot_app %}, or {% data variables.copilot.copilot_cloud_agent %}, you qualify for a 10% discount. For example, if a model has a multiplier of 1x you'll be billed at 0.9x instead.
 
 | Model | Multiplier |
 | --- | ---: |

data/reusables/copilot/auto-model-discount.md

@@ -1 +1 @@
-If you are on a paid {% data variables.product.prodname_copilot_short %} plan, you qualify for a 10% discount on model costs while using {% data variables.copilot.copilot_auto_model_selection_short %} in {% data variables.copilot.copilot_chat_short %}, {% data variables.copilot.copilot_cli_short %}, or {% data variables.copilot.copilot_cloud_agent %}.
+If you are on a paid {% data variables.product.prodname_copilot_short %} plan, you qualify for a 10% discount on model costs while using {% data variables.copilot.copilot_auto_model_selection_short %} in {% data variables.copilot.copilot_chat_short %}, {% data variables.copilot.copilot_cli_short %}, {% data variables.copilot.github_copilot_app %}, or {% data variables.copilot.copilot_cloud_agent %}.

data/tables/copilot/auto-model-selection.yml

@@ -16,47 +16,56 @@
 # - cloud_agent: Availability for Copilot cloud agent.
 # - chat: Availability for Copilot Chat.
 # - cli: Availability for Copilot CLI.
+# - app: Availability for GitHub Copilot app.
 
 # OpenAI
 - name: GPT-5 mini
   cloud_agent: false
   chat: true
   cli: true
+  app: true
 
 - name: GPT-5.3-Codex
   cloud_agent: true
   chat: true
   cli: true
+  app: true
 
 - name: GPT-5.4
   cloud_agent: true
   chat: true
   cli: true
+  app: true
 
 - name: GPT-5.4 mini
   cloud_agent: false
   chat: true
   cli: true
+  app: true
 
 # Anthropic
 - name: Claude Haiku 4.5
   cloud_agent: false
   chat: true
   cli: true
+  app: true
 
 - name: Claude Sonnet 4.6
   cloud_agent: true
   chat: true
   cli: true
+  app: true
 
 # Microsoft
 - name: MAI-Code-1-Flash
   cloud_agent: true
   chat: true
   cli: true
+  app: true
 
 # Fine-tuned OAI models
 - name: Raptor mini
   cloud_agent: false
   chat: true
   cli: false
+  app: false