diff --git a/extensions/copilot/src/extension/conversation/vscode-node/languageModelAccess.ts b/extensions/copilot/src/extension/conversation/vscode-node/languageModelAccess.ts
index 1092915ca08..d9d470af509 100644
--- a/extensions/copilot/src/extension/conversation/vscode-node/languageModelAccess.ts
+++ b/extensions/copilot/src/extension/conversation/vscode-node/languageModelAccess.ts
@@ -424,16 +424,6 @@ export class LanguageModelAccess extends Disposable implements IExtensionContrib
 
 			// Only publish the alias as an entry under the `copilot` vendor
 			// when the resolved endpoint is itself a copilot-provider endpoint.
-			//
-			// Publishing a BYOK-backed alias here would let any extension
-			// resolve `vscode.lm.selectChatModels({ vendor: 'copilot', id:
-			// 'copilot-utility[-small]' })` and proxy requests through the
-			// user's BYOK endpoint without going through that provider's
-			// authorization flow. `isUserSelectable: false` does not prevent
-			// the explicit-id selector from matching the entry. Internal
-			// utility callers do not depend on the alias being published —
-			// they go through `IEndpointProvider.getChatEndpoint(family)`,
-			// which already honors the override.
 			if (!(endpoint instanceof CopilotChatEndpoint)) {
 				this._logService.trace(`[LanguageModelAccess] Not publishing alias '${family}' for non-copilot endpoint '${endpoint.model}' (BYOK override) to avoid bypassing the underlying provider's authorization.`);
 				continue;
diff --git a/extensions/copilot/src/extension/prompt/vscode-node/endpointProviderImpl.ts b/extensions/copilot/src/extension/prompt/vscode-node/endpointProviderImpl.ts
index c7c6661e11e..331cc8716b4 100644
--- a/extensions/copilot/src/extension/prompt/vscode-node/endpointProviderImpl.ts
+++ b/extensions/copilot/src/extension/prompt/vscode-node/endpointProviderImpl.ts
@@ -141,11 +141,7 @@ export class ProductionEndpointProvider extends Disposable implements IEndpointP
 	 * selection for each family lives in the corresponding resolver
 	 * class so callers don't need to know which CAPI family backs each
 	 * purpose.
-	 *
-	 * If the user has configured a model override for the family via the
-	 * `chat.utilityModel` / `chat.utilitySmallModel` settings, this method
-	 * attempts to resolve that model first and falls back to the default
-	 * CAPI-driven resolution if the override cannot be located.
+
 	 */
 	private async _resolveUtilityFamily(family: ChatEndpointFamily): Promise<IChatEndpoint> {
 		const override = await this._resolveUtilityOverride(family);
@@ -163,9 +159,7 @@ export class ProductionEndpointProvider extends Disposable implements IEndpointP
 
 	/**
 	 * Resolves the user's `chat.utilityModel` / `chat.utilitySmallModel`
-	 * override (if any) to a concrete chat endpoint. The stored value is
-	 * encoded as `${vendor}/${id}` to be stable across UI changes and
-	 * directly compatible with `vscode.lm.selectChatModels({ vendor, id })`.
+	 * override (if any) to a concrete chat endpoint.
 	 * Returns `undefined` if no override is configured, if the value is
 	 * malformed, if no matching model is currently available, or if the
 	 * lookup throws.
@@ -180,9 +174,6 @@ export class ProductionEndpointProvider extends Disposable implements IEndpointP
 			return undefined;
 		}
 
-		// `getNonExtensionConfig<string>` only narrows the type at compile
-		// time; at runtime the value can be anything the user wrote into
-		// settings.json. Treat any non-string value as "no override".
 		const raw = this._configService.getNonExtensionConfig<unknown>(configKey);
 		if (typeof raw !== 'string' || raw.length === 0) {
 			if (raw !== undefined && typeof raw !== 'string') {
@@ -251,16 +242,6 @@ export class ProductionEndpointProvider extends Disposable implements IEndpointP
 		return this._instantiationService.createInstance(ExtensionContributedChatEndpoint, model);
 	}
 
-	/**
-	 * Emits a telemetry event the first time (per family) we successfully
-	 * apply a utility-model override. Resolution runs on every utility-alias
-	 * publish, so unguarded emission would be very noisy; we dedupe so we
-	 * emit at most once per family until the override is changed (which
-	 * clears the cache via {@link _lastOverrideTelemetryFingerprint}).
-	 * Failed/fallback resolutions are intentionally not reported. The event
-	 * carries no vendor or model identifiers — those can be user-provided
-	 * values for BYOK/custom endpoint providers.
-	 */
 	private _reportOverrideAppliedTelemetry(family: ChatEndpointFamily): void {
 		if (this._lastOverrideTelemetryFingerprint.has(family)) {
 			return;
diff --git a/src/vs/workbench/contrib/chat/browser/defaultModelContribution.ts b/src/vs/workbench/contrib/chat/browser/defaultModelContribution.ts
index 153fad8e204..3b6942cda2f 100644
--- a/src/vs/workbench/contrib/chat/browser/defaultModelContribution.ts
+++ b/src/vs/workbench/contrib/chat/browser/defaultModelContribution.ts
@@ -40,21 +40,16 @@ export interface DefaultModelContributionOptions {
 	 * When `true`, eagerly call `selectLanguageModels({})` at construction
 	 * time and on `onDidChangeLanguageModelVendors` to force every registered
 	 * provider extension to resolve its models. This ensures models from
-	 * providers that no other consumer has touched yet (e.g. BYOK Anthropic
-	 * / OpenAI) surface in the picker — at the cost of activating those
-	 * provider extensions.
+	 * providers that no other consumer has touched yet (e.g. BYOK) surface in
+	 * the picker at the cost of activating those provider extensions.
 	 *
 	 * Defaults to `false` so contributions that run during startup
-	 * (`BlockRestore`) don't pay that activation cost. Contributions that
-	 * register at later phases (e.g. `Eventually`) can opt in.
+	 * (`BlockRestore`) don't pay that activation cost.
 	 */
 	readonly eagerVendorResolution?: boolean;
 	/**
 	 * Optional override for the label of the default ("empty") enum entry.
-	 * When omitted, defaults to `"Auto (Vendor Default)"`. Provide a
-	 * setting-specific copy when the empty value does not represent a
-	 * vendor-default (e.g. `chat.utilityModel` falls back to the built-in
-	 * utility family default, not a vendor default).
+	 * When omitted, defaults to `"Auto (Vendor Default)"`.
 	 */
 	readonly defaultEntryLabel?: string;
 	/**
@@ -68,9 +63,6 @@ export interface DefaultModelContributionOptions {
  * Creates the initial static arrays used by configuration registration code.
  * The returned arrays are mutated in-place by {@link DefaultModelContribution}.
  *
- * `defaultEntryLabel` / `defaultEntryDescription` override the copy used for
- * the empty/default enum entry. Pass setting-specific copy when the empty
- * value does not represent a vendor-default.
  */
 export function createDefaultModelArrays(defaultEntryLabel?: string, defaultEntryDescription?: string): DefaultModelArrays {
 	return {
@@ -95,10 +87,7 @@ export abstract class DefaultModelContribution extends Disposable {
 		super();
 		this._register(_languageModelsService.onDidChangeLanguageModels(() => this._updateModelValues()));
 		if (_options.eagerVendorResolution) {
-			// New vendors (e.g. BYOK Anthropic) may register after this contribution
-			// has already started. Re-trigger resolution so their models surface in
-			// the picker too — `selectLanguageModels({})` only resolves vendors that
-			// were registered at call time.
+			// New vendors (e.g. BYOK) may register after this contribution has already started.
 			this._register(_languageModelsService.onDidChangeLanguageModelVendors(() => this._resolveAllVendors()));
 		}
 		this._updateModelValues();
@@ -108,13 +97,6 @@ export abstract class DefaultModelContribution extends Disposable {
 	}
 
 	private _resolveAllVendors(): void {
-		// Trigger resolution of every registered vendor so models from providers that
-		// haven't yet been touched by another consumer (e.g. BYOK Anthropic / OpenAI)
-		// also surface in the picker. Each vendor's resolution will fire
-		// `onDidChangeLanguageModels`, which re-runs `_updateModelValues` above.
-		// We additionally re-run `_updateModelValues` once everything resolves so that
-		// providers which add no new models (and therefore don't fire the change event)
-		// still get reflected in the picker.
 		const vendors = this._languageModelsService.getVendors().map(v => v.vendor);
 		this._logService.trace(`${this._options.logPrefix} Resolving all vendors: [${vendors.join(', ')}]`);
 		this._languageModelsService.selectLanguageModels({}).then(