diff --git a/.changeset/slimy-mirrors-nail.md b/.changeset/slimy-mirrors-nail.md
new file mode 100644
index 00000000000..e68a3b900b4
--- /dev/null
+++ b/.changeset/slimy-mirrors-nail.md
@@ -0,0 +1,5 @@
+---
+'@firebase/ai': major
+---
+
+Remove GroundingAttribution
diff --git a/common/api-review/ai.api.md b/common/api-review/ai.api.md
index 23c13688fb1..67e2c31507f 100644
--- a/common/api-review/ai.api.md
+++ b/common/api-review/ai.api.md
@@ -485,22 +485,8 @@ export interface GoogleAIGenerateContentResponse {
     usageMetadata?: UsageMetadata;
 }
 
-// @public @deprecated (undocumented)
-export interface GroundingAttribution {
-    // (undocumented)
-    confidenceScore?: number;
-    // (undocumented)
-    retrievedContext?: RetrievedContextAttribution;
-    // (undocumented)
-    segment: Segment;
-    // (undocumented)
-    web?: WebAttribution;
-}
-
 // @public
 export interface GroundingMetadata {
-    // @deprecated (undocumented)
-    groundingAttributions: GroundingAttribution[];
     // (undocumented)
     retrievalQueries?: string[];
     // (undocumented)
diff --git a/docs-devsite/_toc.yaml b/docs-devsite/_toc.yaml
index b77a6b5910e..46c5e4b5080 100644
--- a/docs-devsite/_toc.yaml
+++ b/docs-devsite/_toc.yaml
@@ -76,8 +76,6 @@ toc:
     path: /docs/reference/js/ai.generativemodel.md
   - title: GoogleAIBackend
     path: /docs/reference/js/ai.googleaibackend.md
-  - title: GroundingAttribution
-    path: /docs/reference/js/ai.groundingattribution.md
   - title: GroundingMetadata
     path: /docs/reference/js/ai.groundingmetadata.md
   - title: ImagenGCSImage
diff --git a/docs-devsite/ai.groundingattribution.md b/docs-devsite/ai.groundingattribution.md
deleted file mode 100644
index a0895550bf1..00000000000
--- a/docs-devsite/ai.groundingattribution.md
+++ /dev/null
@@ -1,62 +0,0 @@
-Project: /docs/reference/js/_project.yaml
-Book: /docs/reference/_book.yaml
-page_type: reference
-
-{% comment %}
-DO NOT EDIT THIS FILE!
-This is generated by the JS SDK team, and any local changes will be
-overwritten. Changes should be made in the source code at
-https://github.com/firebase/firebase-js-sdk
-{% endcomment %}
-
-# GroundingAttribution interface
-> Warning: This API is now obsolete.
-> 
-> 
-
-<b>Signature:</b>
-
-```typescript
-export interface GroundingAttribution 
-```
-
-## Properties
-
-|  Property | Type | Description |
-|  --- | --- | --- |
-|  [confidenceScore](./ai.groundingattribution.md#groundingattributionconfidencescore) | number |  |
-|  [retrievedContext](./ai.groundingattribution.md#groundingattributionretrievedcontext) | [RetrievedContextAttribution](./ai.retrievedcontextattribution.md#retrievedcontextattribution_interface) |  |
-|  [segment](./ai.groundingattribution.md#groundingattributionsegment) | [Segment](./ai.segment.md#segment_interface) |  |
-|  [web](./ai.groundingattribution.md#groundingattributionweb) | [WebAttribution](./ai.webattribution.md#webattribution_interface) |  |
-
-## GroundingAttribution.confidenceScore
-
-<b>Signature:</b>
-
-```typescript
-confidenceScore?: number;
-```
-
-## GroundingAttribution.retrievedContext
-
-<b>Signature:</b>
-
-```typescript
-retrievedContext?: RetrievedContextAttribution;
-```
-
-## GroundingAttribution.segment
-
-<b>Signature:</b>
-
-```typescript
-segment: Segment;
-```
-
-## GroundingAttribution.web
-
-<b>Signature:</b>
-
-```typescript
-web?: WebAttribution;
-```
diff --git a/docs-devsite/ai.groundingmetadata.md b/docs-devsite/ai.groundingmetadata.md
index 90994d9c01c..60bb4d23cbe 100644
--- a/docs-devsite/ai.groundingmetadata.md
+++ b/docs-devsite/ai.groundingmetadata.md
@@ -22,22 +22,9 @@ export interface GroundingMetadata
 
 |  Property | Type | Description |
 |  --- | --- | --- |
-|  [groundingAttributions](./ai.groundingmetadata.md#groundingmetadatagroundingattributions) | [GroundingAttribution](./ai.groundingattribution.md#groundingattribution_interface)<!-- -->\[\] |  |
 |  [retrievalQueries](./ai.groundingmetadata.md#groundingmetadataretrievalqueries) | string\[\] |  |
 |  [webSearchQueries](./ai.groundingmetadata.md#groundingmetadatawebsearchqueries) | string\[\] |  |
 
-## GroundingMetadata.groundingAttributions
-
-> Warning: This API is now obsolete.
-> 
-> 
-
-<b>Signature:</b>
-
-```typescript
-groundingAttributions: GroundingAttribution[];
-```
-
 ## GroundingMetadata.retrievalQueries
 
 <b>Signature:</b>
diff --git a/docs-devsite/ai.md b/docs-devsite/ai.md
index 286c8351fd7..3d2511b0d5f 100644
--- a/docs-devsite/ai.md
+++ b/docs-devsite/ai.md
@@ -95,7 +95,6 @@ The Firebase AI Web SDK.
 |  [GenerateContentStreamResult](./ai.generatecontentstreamresult.md#generatecontentstreamresult_interface) | Result object returned from [GenerativeModel.generateContentStream()](./ai.generativemodel.md#generativemodelgeneratecontentstream) call. Iterate over <code>stream</code> to get chunks as they come in and/or use the <code>response</code> promise to get the aggregated response when the stream is done. |
 |  [GenerationConfig](./ai.generationconfig.md#generationconfig_interface) | Config options for content-related requests |
 |  [GenerativeContentBlob](./ai.generativecontentblob.md#generativecontentblob_interface) | Interface for sending an image. |
-|  [GroundingAttribution](./ai.groundingattribution.md#groundingattribution_interface) |  |
 |  [GroundingMetadata](./ai.groundingmetadata.md#groundingmetadata_interface) | Metadata returned to client when grounding is enabled. |
 |  [ImagenGCSImage](./ai.imagengcsimage.md#imagengcsimage_interface) | An image generated by Imagen, stored in a Cloud Storage for Firebase bucket.<!-- -->This feature is not available yet. |
 |  [ImagenGenerationConfig](./ai.imagengenerationconfig.md#imagengenerationconfig_interface) | <b><i>(Public Preview)</i></b> Configuration options for generating images with Imagen.<!-- -->See the [documentation](http://firebase.google.com/docs/vertex-ai/generate-images-imagen) for more details. |
diff --git a/packages/ai/src/types/responses.ts b/packages/ai/src/types/responses.ts
index e33b8a86bd3..87e2a0d1be2 100644
--- a/packages/ai/src/types/responses.ts
+++ b/packages/ai/src/types/responses.ts
@@ -177,21 +177,6 @@ export interface Citation {
 export interface GroundingMetadata {
   webSearchQueries?: string[];
   retrievalQueries?: string[];
-  /**
-   * @deprecated
-   */
-  groundingAttributions: GroundingAttribution[];
-}
-
-/**
- * @deprecated
- * @public
- */
-export interface GroundingAttribution {
-  segment: Segment;
-  confidenceScore?: number;
-  web?: WebAttribution;
-  retrievedContext?: RetrievedContextAttribution;
 }
 
 /**