diff --git a/src/api.ts b/src/api.ts
index b2e48b8..b409299 100644
--- a/src/api.ts
+++ b/src/api.ts
@@ -32,7 +32,7 @@ import {
 } from './observability/generation';
 import { Step, StepType } from './observability/step';
 import { CleanThreadFields, Thread } from './observability/thread';
-import { Prompt } from './prompt-engineering/prompt';
+import { IPromptRollout, Prompt } from './prompt-engineering/prompt';
 import {
   Environment,
   Maybe,
@@ -2080,4 +2080,78 @@ export class API {
 
     return new Prompt(this, promptData);
   }
+
+  /**
+   * Retrieves a prompt A/B testing rollout by its name.
+   *
+   * @param name - The name of the prompt to retrieve.
+   * @returns A list of prompt rollout versions.
+   */
+  public async getPromptAbTesting(
+    name: string
+  ): Promise<IPromptRollout[] | null> {
+    const query = `
+   query getPromptLineageRollout($projectId: String, $lineageName: String!) {
+    promptLineageRollout(projectId: $projectId, lineageName: $lineageName) {
+      pageInfo {
+        startCursor
+        endCursor
+      }
+      edges {
+        node {
+          version
+          rollout
+        }
+      }
+    }
+  }
+   `;
+
+    const variables = { lineageName: name };
+    const result = await this.makeGqlCall(query, variables);
+
+    if (!result.data || !result.data.promptLineageRollout) {
+      return null;
+    }
+
+    const response = result.data.promptLineageRollout;
+
+    return response.edges.map((x: any) => x.node);
+  }
+
+  /**
+   * Update a prompt A/B testing rollout by its name.
+   *
+   * @param name - The name of the prompt to retrieve.
+   * @param rollouts - A list of prompt rollout versions.
+   * @returns A list of prompt rollout versions.
+   */
+  public async updatePromptAbTesting(name: string, rollouts: IPromptRollout[]) {
+    const mutation = `
+      mutation updatePromptLineageRollout(
+        $projectId: String
+        $name: String!
+        $rollouts: [PromptVersionRolloutInput!]!
+      ) {
+        updatePromptLineageRollout(
+          projectId: $projectId
+          name: $name
+          rollouts: $rollouts
+        ) {
+          ok
+          message
+          errorCode
+        }
+      }
+     `;
+
+    const variables = { name: name, rollouts };
+    const result = await this.makeGqlCall(mutation, variables);
+
+    if (!result.data || !result.data.updatePromptLineageRollout) {
+      return null;
+    }
+
+    return result.data.promptLineageRollout;
+  }
 }
diff --git a/src/prompt-engineering/prompt.ts b/src/prompt-engineering/prompt.ts
index e786e41..599e9eb 100644
--- a/src/prompt-engineering/prompt.ts
+++ b/src/prompt-engineering/prompt.ts
@@ -46,6 +46,11 @@ class PromptFields extends Utils {
   variables!: IPromptVariableDefinition[];
 }
 
+export interface IPromptRollout {
+  version: number;
+  rollout: number;
+}
+
 export type PromptConstructor = OmitUtils<PromptFields>;
 
 export class Prompt extends PromptFields {
diff --git a/tests/api.test.ts b/tests/api.test.ts
index ff78430..41a2a2c 100644
--- a/tests/api.test.ts
+++ b/tests/api.test.ts
@@ -600,7 +600,7 @@ describe('End to end tests for the SDK', function () {
     it('should format a prompt with default values', async () => {
       const prompt = await client.api.getPrompt('Default');
 
-      const formatted = prompt!.format();
+      const formatted = prompt!.formatMessages();
 
       const expected = `Hello, this is a test value and this
 
@@ -617,7 +617,7 @@ is a templated list.`;
     it('should format a prompt with custom values', async () => {
       const prompt = await client.api.getPrompt('Default');
 
-      const formatted = prompt!.format({ test_var: 'Edited value' });
+      const formatted = prompt!.formatMessages({ test_var: 'Edited value' });
 
       const expected = `Hello, this is a Edited value and this
 
@@ -630,5 +630,16 @@ is a templated list.`;
       expect(formatted.length).toBe(1);
       expect(formatted[0].content).toBe(expected);
     });
+
+    it('should get a prompt A/B testing configuration', async () => {
+      await client.api.updatePromptAbTesting('Default', [
+        { version: 0, rollout: 100 }
+      ]);
+      const rollouts = await client.api.getPromptAbTesting('Default');
+      expect(rollouts).not.toBeNull();
+      expect(rollouts?.length).toBe(1);
+      expect(rollouts![0].rollout).toBe(100);
+      expect(rollouts![0].version).toBe(0);
+    });
   });
 });