diff --git a/content/code-security/code-scanning/creating-an-advanced-setup-for-code-scanning/codeql-code-scanning-for-compiled-languages.md b/content/code-security/code-scanning/creating-an-advanced-setup-for-code-scanning/codeql-code-scanning-for-compiled-languages.md
index 8aa621dc7b..28b7fd4995 100644
--- a/content/code-security/code-scanning/creating-an-advanced-setup-for-code-scanning/codeql-code-scanning-for-compiled-languages.md
+++ b/content/code-security/code-scanning/creating-an-advanced-setup-for-code-scanning/codeql-code-scanning-for-compiled-languages.md
@@ -308,7 +308,15 @@ If you added manual build steps for compiled languages and {% data variables.pro
 
 ## Building C/C++
 
-{% ifversion codeql-no-build %}{% data variables.product.prodname_codeql %} supports build modes `autobuild` or `manual` for C/C++ code.
+{% ifversion codeql-no-build %}{% data variables.product.prodname_codeql %} supports build modes {% ifversion codeql-no-build-c-cpp %}`none`, {% endif %}`autobuild` or `manual` for C/C++ code.
+
+{% ifversion codeql-no-build-c-cpp %}
+
+When you enable default setup for a repository that contains C/C++ code, the build mode is set to `none` automatically.
+
+>[!NOTE] Support of build mode `none` for C/C++ codebases is currently in {% data variables.release-phases.public_preview %} and subject to change.
+
+{% endif %}
 
 ### Autobuild summary for C/C++{% endif %}
 
diff --git a/content/code-security/codeql-cli/getting-started-with-the-codeql-cli/preparing-your-code-for-codeql-analysis.md b/content/code-security/codeql-cli/getting-started-with-the-codeql-cli/preparing-your-code-for-codeql-analysis.md
index 5c6a0528ea..e4057e38f8 100644
--- a/content/code-security/codeql-cli/getting-started-with-the-codeql-cli/preparing-your-code-for-codeql-analysis.md
+++ b/content/code-security/codeql-cli/getting-started-with-the-codeql-cli/preparing-your-code-for-codeql-analysis.md
@@ -201,10 +201,10 @@ In addition, for {% data variables.code-scanning.no_build_support %}, there is a
 The {% data variables.product.prodname_codeql_cli %} includes autobuilders for {% data variables.code-scanning.compiled_languages %} code. {% data variables.product.prodname_codeql %} autobuilders allow you to build projects for compiled languages without specifying any build commands. When an autobuilder is invoked, {% data variables.product.prodname_codeql %} examines the source for evidence of a build system and attempts to run the optimal set of commands required to extract a database. For more information, see [AUTOTITLE](/code-security/code-scanning/creating-an-advanced-setup-for-code-scanning/codeql-code-scanning-for-compiled-languages#about-autobuild).
 
 An autobuilder is invoked automatically when you execute `codeql database create` for a compiled language if you don’t include a
-`--command` option{% ifversion codeql-no-build %} or set `--build-mode none`{% endif %}. For example, for a C/C++ codebase, you could simply run:
+`--command` option{% ifversion codeql-no-build %} or set `--build-mode none`{% endif %}. For example, for a Swift codebase, you could simply run:
 
 ```shell
-codeql database create --language=cpp <output-folder>/cpp-database
+codeql database create --language=swift <output-folder>/swift-database
 ```
 
 If a codebase uses a standard build system, relying on an autobuilder is often the simplest way to create a database. For sources that require non-standard build steps, you may need to explicitly define each step in the command line.
diff --git a/content/copilot/using-github-copilot/ai-models/changing-the-ai-model-for-copilot-chat.md b/content/copilot/using-github-copilot/ai-models/changing-the-ai-model-for-copilot-chat.md
index d0446ccfc9..5560006be2 100644
--- a/content/copilot/using-github-copilot/ai-models/changing-the-ai-model-for-copilot-chat.md
+++ b/content/copilot/using-github-copilot/ai-models/changing-the-ai-model-for-copilot-chat.md
@@ -8,7 +8,7 @@ topics:
   - Copilot
 ---
 
-By default, {% data variables.copilot.copilot_chat_short %} uses a base model to provide fast, capable responses for a wide range of tasks, such as summarization, knowledge-based questions, reasoning, math, and coding.
+By default, {% data variables.copilot.copilot_chat_short %} uses {% data variables.copilot.copilot_gpt_41 %} to provide fast, capable responses for a wide range of tasks, such as summarization, knowledge-based questions, reasoning, math, and coding.
 
 However, you are not limited to using this model. You can choose from a selection of other models, each with its own particular strengths. You may have a favorite model that you like to use, or you might prefer to use a particular model for inquiring about a specific subject.
 
@@ -21,9 +21,8 @@ Changing the model that's used by {% data variables.copilot.copilot_chat_short %
 {% webui %}
 
 > [!NOTE]
-> * Multiple model support in {% data variables.copilot.copilot_chat_short %} is in {% data variables.release-phases.public_preview %} and is subject to change.
-> * Support for GPT-4.5 is only available on {% data variables.copilot.copilot_pro_plus_short %}{% ifversion copilot-enterprise %} and {% data variables.copilot.copilot_enterprise_short %}{% endif %}.
-> * You can only use an alternative AI model in the immersive view of {% data variables.copilot.copilot_chat_short %}. This is the full-page version of {% data variables.copilot.copilot_chat_short %} that's displayed at [https://github.com/copilot](https://github.com/copilot). The {% data variables.copilot.copilot_chat_short %} panel always uses the default model.
+> * Support for {% data variables.copilot.copilot_gpt_45 %}, {% data variables.copilot.copilot_claude_opus %}, and {% data variables.copilot.copilot_o3 %} are only available on {% data variables.copilot.copilot_pro_plus_short %}{% ifversion copilot-enterprise %} and {% data variables.copilot.copilot_enterprise_short %}{% endif %}.
+> * You can only use an alternative AI model in the immersive view of {% data variables.copilot.copilot_chat_short %} on GitHub.com. This is the full-page version of {% data variables.copilot.copilot_chat_short %} that's displayed at [https://github.com/copilot](https://github.com/copilot). The {% data variables.copilot.copilot_chat_short %} panel always uses the default model.
 
 ## AI models for {% data variables.copilot.copilot_chat_short %}
 
@@ -35,14 +34,14 @@ The following models are currently available in the immersive mode of {% data va
 * {% data variables.copilot.copilot_claude_sonnet_35 %}
 * {% data variables.copilot.copilot_claude_sonnet_37 %}
 * {% data variables.copilot.copilot_claude_sonnet_37 %} Thinking
-* {% data variables.copilot.copilot_claude_sonnet_40 %}
-* {% data variables.copilot.copilot_claude_opus %}
+* {% data variables.copilot.copilot_claude_sonnet_40 %} (preview)
+* {% data variables.copilot.copilot_claude_opus %} (preview)
 * {% data variables.copilot.copilot_gemini_flash %}
 * {% data variables.copilot.copilot_gemini_25_pro %} (preview)
-* {% data variables.copilot.copilot_o1 %}
-* {% data variables.copilot.copilot_o3 %}
+* {% data variables.copilot.copilot_o1 %} (preview)
+* {% data variables.copilot.copilot_o3 %} (preview)
 * {% data variables.copilot.copilot_o3_mini %}
-* {% data variables.copilot.copilot_o4_mini %}
+* {% data variables.copilot.copilot_o4_mini %} (preview)
 
 For more information about these models, see [AUTOTITLE](/copilot/using-github-copilot/ai-models/choosing-the-right-ai-model-for-your-task).
 
@@ -58,11 +57,11 @@ These instructions are for {% data variables.product.prodname_copilot_short %} o
 
 > [!NOTE] If you use {% data variables.copilot.copilot_extensions_short %}, they may override the model you select.
 
-1. In the top right of any page on {% data variables.product.github %}, click {% octicon "triangle-down" aria-label="The downwards triangle icon" %} beside the **{% octicon "copilot" aria-hidden="true" aria-label="copilot" %}** icon and click **Immersive** in the dropdown menu.
+1. In the top right of any page on {% data variables.product.github %}, click the **{% octicon "copilot" aria-hidden="true" aria-label="copilot" %}** icon.
 
-   ![Screenshot of the 'Immersive' button, highlighted with a dark orange outline.](/assets/images/help/copilot/copilot-immersive-button.png)
+   ![Screenshot of the 'Copilot' button, highlighted with a dark orange outline.](/assets/images/help/copilot/copilot-icon-top-right.png)
 
-1. At the top of the immersive view, select the **CURRENT-MODEL** {% octicon "chevron-down" aria-hidden="true" aria-label="chevron-down" %} dropdown menu, then click the AI model of your choice.
+1. At the bottom of the immersive view, select the **CURRENT-MODEL** {% octicon "chevron-down" aria-hidden="true" aria-label="chevron-down" %} dropdown menu, then click the AI model of your choice.
 
 1. Optionally, after submitting a prompt, you can regenerate the same prompt using a different model by clicking the retry icon ({% octicon "sync" aria-label="The re-run icon" %}) below the response. The new response will use your selected model and maintain the full context of the conversation.
 
@@ -72,7 +71,7 @@ These instructions are for {% data variables.product.prodname_copilot_short %} o
 
 > [!NOTE]
 > * Multiple model support in {% data variables.copilot.copilot_chat_short %} is in {% data variables.release-phases.public_preview %} and is subject to change.
-> * Support for GPT-4.5 is only available on {% data variables.copilot.copilot_pro_plus_short %}{% ifversion copilot-enterprise %} and {% data variables.copilot.copilot_enterprise_short %}{% endif %}.
+> * Support for {% data variables.copilot.copilot_gpt_45 %}, {% data variables.copilot.copilot_claude_opus %}, and {% data variables.copilot.copilot_o3 %} are only available on {% data variables.copilot.copilot_pro_plus_short %}{% ifversion copilot-enterprise %} and {% data variables.copilot.copilot_enterprise_short %}{% endif %}.
 
 ## AI models for {% data variables.copilot.copilot_chat_short %}
 
@@ -84,13 +83,14 @@ The following models are currently available through multi-model {% data variabl
 * {% data variables.copilot.copilot_claude_sonnet_35 %}
 * {% data variables.copilot.copilot_claude_sonnet_37 %}
 * {% data variables.copilot.copilot_claude_sonnet_37 %} Thinking
-* {% data variables.copilot.copilot_claude_sonnet_40 %}
-* {% data variables.copilot.copilot_claude_opus %}
+* {% data variables.copilot.copilot_claude_sonnet_40 %} (preview)
+* {% data variables.copilot.copilot_claude_opus %} (preview)
 * {% data variables.copilot.copilot_gemini_flash %}
-* {% data variables.copilot.copilot_o1 %}
-* {% data variables.copilot.copilot_o3 %}
+* {% data variables.copilot.copilot_gemini_25_pro %} (preview)
+* {% data variables.copilot.copilot_o1 %} (preview)
+* {% data variables.copilot.copilot_o3 %} (preview)
 * {% data variables.copilot.copilot_o3_mini %}
-* {% data variables.copilot.copilot_o4_mini %}
+* {% data variables.copilot.copilot_o4_mini %} (preview)
 
 For more information about these models, see [AUTOTITLE](/copilot/using-github-copilot/ai-models/choosing-the-right-ai-model-for-your-task).
 
@@ -109,17 +109,22 @@ These instructions are for {% data variables.product.prodname_vscode_shortname %
 
 {% visualstudio %}
 
-> [!NOTE] Multiple model support in {% data variables.copilot.copilot_chat_short %} is in {% data variables.release-phases.public_preview %} and is subject to change.
-
 ## AI models for {% data variables.copilot.copilot_chat_short %}
 
 The following models are currently available through multi-model {% data variables.copilot.copilot_chat_short %}:
 
 * {% data variables.copilot.copilot_gpt_4o %}
+* {% data variables.copilot.copilot_gpt_41 %}
+* {% data variables.copilot.copilot_gpt_45 %} (preview)
 * {% data variables.copilot.copilot_claude_sonnet_35 %}
 * {% data variables.copilot.copilot_claude_sonnet_37 %}
-* {% data variables.copilot.copilot_o1 %}
+* {% data variables.copilot.copilot_claude_sonnet_37 %} Thinking
+* {% data variables.copilot.copilot_gemini_flash %}
+* {% data variables.copilot.copilot_gemini_25_pro %} (preview)
+* {% data variables.copilot.copilot_o1 %} (preview)
+* {% data variables.copilot.copilot_o3 %} (preview)
 * {% data variables.copilot.copilot_o3_mini %}
+* {% data variables.copilot.copilot_o4_mini %} (preview)
 
 For more information about these models, see [AUTOTITLE](/copilot/using-github-copilot/ai-models/choosing-the-right-ai-model-for-your-task).
 
@@ -142,7 +147,7 @@ To use multi-model {% data variables.copilot.copilot_chat_short %}, you must use
 
 > [!NOTE]
 > * Multiple model support in {% data variables.copilot.copilot_chat_short %} is in {% data variables.release-phases.public_preview %} and is subject to change.
-> * Support for GPT-4.5 is only available on {% data variables.copilot.copilot_pro_plus_short %}{% ifversion copilot-enterprise %} and {% data variables.copilot.copilot_enterprise_short %}{% endif %}.
+> * Support for {% data variables.copilot.copilot_gpt_45 %} and {% data variables.copilot.copilot_o3 %} are only available on {% data variables.copilot.copilot_pro_plus_short %}{% ifversion copilot-enterprise %} and {% data variables.copilot.copilot_enterprise_short %}{% endif %}.
 
 ## AI models for {% data variables.copilot.copilot_chat_short %}
 
@@ -181,20 +186,24 @@ These instructions are for the JetBrains IDEs. For instructions on different cli
 
 > [!NOTE]
 > * Multiple model support in {% data variables.copilot.copilot_chat_short %} is in {% data variables.release-phases.public_preview %} and is subject to change.
-> * Support for GPT-4.5 is only available on {% data variables.copilot.copilot_pro_plus_short %}{% ifversion copilot-enterprise %} and {% data variables.copilot.copilot_enterprise_short %}{% endif %}.
+> * Support for {% data variables.copilot.copilot_gpt_45 %} and {% data variables.copilot.copilot_o3 %} are only available on {% data variables.copilot.copilot_pro_plus_short %}{% ifversion copilot-enterprise %} and {% data variables.copilot.copilot_enterprise_short %}{% endif %}.
 
 ## AI models for {% data variables.copilot.copilot_chat_short %}
 
 The following models are currently available through multi-model {% data variables.copilot.copilot_chat_short %}:
 
 * {% data variables.copilot.copilot_gpt_4o %}
+* {% data variables.copilot.copilot_gpt_41 %}
 * {% data variables.copilot.copilot_gpt_45 %} (preview)
 * {% data variables.copilot.copilot_claude_sonnet_35 %}
 * {% data variables.copilot.copilot_claude_sonnet_37 %}
 * {% data variables.copilot.copilot_claude_sonnet_37 %} Thinking
 * {% data variables.copilot.copilot_gemini_flash %}
+* {% data variables.copilot.copilot_gemini_25_pro %} (preview)
 * {% data variables.copilot.copilot_o1 %} (preview)
+* {% data variables.copilot.copilot_o3 %} (preview)
 * {% data variables.copilot.copilot_o3_mini %}
+* {% data variables.copilot.copilot_o4_mini %} (preview)
 
 For more information about these models, see [AUTOTITLE](/copilot/using-github-copilot/ai-models/choosing-the-right-ai-model-for-your-task).
 
@@ -216,7 +225,7 @@ These instructions are for the Eclipse IDE. For instructions on different client
 
 > [!NOTE]
 > * Multiple model support in {% data variables.copilot.copilot_chat_short %} is in {% data variables.release-phases.public_preview %} and is subject to change.
-> * Support for GPT-4.5 is only available on {% data variables.copilot.copilot_pro_plus_short %}{% ifversion copilot-enterprise %} and {% data variables.copilot.copilot_enterprise_short %}{% endif %}.
+> * Support for {% data variables.copilot.copilot_gpt_45 %} and {% data variables.copilot.copilot_o3 %} are only available on {% data variables.copilot.copilot_pro_plus_short %}{% ifversion copilot-enterprise %} and {% data variables.copilot.copilot_enterprise_short %}{% endif %}.
 
 ## AI models for {% data variables.copilot.copilot_chat_short %}
 
diff --git a/data/features/codeql-no-build-c-cpp.yml b/data/features/codeql-no-build-c-cpp.yml
new file mode 100644
index 0000000000..a95f111c4d
--- /dev/null
+++ b/data/features/codeql-no-build-c-cpp.yml
@@ -0,0 +1,5 @@
+# Reference: #16543 (C/C++ public preview)
+
+versions:
+  fpt: '*'
+  ghec: '*'
diff --git a/data/variables/code-scanning.yml b/data/variables/code-scanning.yml
index fa80d2cdd6..0d13ebb308 100644
--- a/data/variables/code-scanning.yml
+++ b/data/variables/code-scanning.yml
@@ -7,7 +7,7 @@ codeql_workflow: 'CodeQL analysis workflow'
 tool_status_page: 'tool status page'
 
 # List of compiled languages supported for `no-build` extraction
-no_build_support: '{% ifversion codeql-no-build-csharp %}C# and{% endif %} Java'
+no_build_support: '{% ifversion codeql-no-build-c-cpp %}C/C++, {% endif %}{% ifversion codeql-no-build-csharp %}C# and{% endif %} Java'
 
 # List of compiled languages
 compiled_languages: 'C/C++, C#, Go, Java, Kotlin, and Swift'
diff --git a/src/links/scripts/rendered-content-link-checker.ts b/src/links/scripts/rendered-content-link-checker.ts
index db4aef1c59..9ac32cfec9 100755
--- a/src/links/scripts/rendered-content-link-checker.ts
+++ b/src/links/scripts/rendered-content-link-checker.ts
@@ -570,9 +570,16 @@ function flawIssueDisplay(flaws: LinkFlaw[], opts: Options, mentionExternalExclu
       'For more information, see [Fixing broken links in GitHub user docs](https://github.com/github/docs/blob/main/src/links/lib/README.md).'
   }
 
-  return `${flawsToDisplay} broken${
+  output = `${flawsToDisplay} broken${
     opts.commentLimitToExternalLinks ? ' **external** ' : ' '
   }links found in [this](${opts.actionUrl}) workflow.\n${output}`
+
+  // limit is 65536
+  if (output.length > 60000) {
+    output = output.slice(0, 60000) + '\n\n---\n\nOUTPUT TRUNCATED'
+  }
+
+  return output
 }
 
 function printGlobalCacheHitRatio(core: CoreInject) {