diff --git a/genai/test/thinking-budget-with-txt.test.js b/genai/test/thinking-budget-with-txt.test.js
new file mode 100644
index 0000000000..5daaa2997f
--- /dev/null
+++ b/genai/test/thinking-budget-with-txt.test.js
@@ -0,0 +1,29 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+const {assert} = require('chai');
+const {describe, it} = require('mocha');
+
+const projectId = process.env.CAIP_PROJECT_ID;
+const sample = require('../thinking/thinking-budget-with-txt.js');
+
+describe('thinking-budget-with-txt', () => {
+  it('should return Thought Process', async function () {
+    this.timeout(50000);
+    const output = await sample.generateWithThoughts(projectId);
+    assert(output.length > 0);
+  });
+});
diff --git a/genai/test/thinking-includethoughts-with-txt.test.js b/genai/test/thinking-includethoughts-with-txt.test.js
new file mode 100644
index 0000000000..69a8a32800
--- /dev/null
+++ b/genai/test/thinking-includethoughts-with-txt.test.js
@@ -0,0 +1,29 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+const {assert} = require('chai');
+const {describe, it} = require('mocha');
+
+const projectId = process.env.CAIP_PROJECT_ID;
+const sample = require('../thinking/thinking-includethoughts-with-txt.js');
+
+describe('thinking-includethoughts-with-txt', () => {
+  it('should return Thought Process', async function () {
+    this.timeout(50000);
+    const output = await sample.generateWithThoughts(projectId);
+    assert(output.length > 0);
+  });
+});
diff --git a/genai/test/thinking-with-txt.test.js b/genai/test/thinking-with-txt.test.js
new file mode 100644
index 0000000000..0ed201f75a
--- /dev/null
+++ b/genai/test/thinking-with-txt.test.js
@@ -0,0 +1,29 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+const {assert} = require('chai');
+const {describe, it} = require('mocha');
+
+const projectId = process.env.CAIP_PROJECT_ID;
+const sample = require('../thinking/thinking-with-txt.js');
+
+describe('thinking-with-txt', () => {
+  it('should return Thought Process', async function () {
+    this.timeout(50000);
+    const output = await sample.generateWithThoughts(projectId);
+    assert(output.length > 0);
+  });
+});
diff --git a/genai/thinking/thinking-budget-with-txt.js b/genai/thinking/thinking-budget-with-txt.js
new file mode 100644
index 0000000000..879ac159e2
--- /dev/null
+++ b/genai/thinking/thinking-budget-with-txt.js
@@ -0,0 +1,69 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+// [START googlegenaisdk_thinking_budget_with_txt]
+const {GoogleGenAI} = require('@google/genai');
+
+const GOOGLE_CLOUD_PROJECT = process.env.GOOGLE_CLOUD_PROJECT;
+const GOOGLE_CLOUD_LOCATION = process.env.GOOGLE_CLOUD_LOCATION || 'global';
+
+async function generateWithThoughts(
+  projectId = GOOGLE_CLOUD_PROJECT,
+  location = GOOGLE_CLOUD_LOCATION
+) {
+  const client = new GoogleGenAI({
+    vertexai: true,
+    project: projectId,
+    location: location,
+  });
+
+  const response = await client.models.generateContent({
+    model: 'gemini-2.5-flash',
+    contents: 'solve x^2 + 4x + 4 = 0',
+    config: {
+      thinkingConfig: {
+        thinkingBudget: 1024,
+      },
+    },
+  });
+
+  console.log(response.text);
+  // Example response:
+  //  To solve the equation $x^2 + 4x + 4 = 0$, you can use several methods:
+  //  **Method 1: Factoring**
+  //  1.  Look for two numbers that multiply to the constant term (4) and add up to the coefficient of the $x$ term (4).
+  //  2.  The numbers are 2 and 2 ($2 \times 2 = 4$ and $2 + 2 = 4$).
+  //  ...
+  //  ...
+  //  All three methods yield the same solution. This quadratic equation has exactly one distinct solution (a repeated root).
+  //  The solution is **x = -2**.
+
+  // Token count for `Thinking`
+  console.log(response.usageMetadata.thoughtsTokenCount);
+  // Example response:
+  //  886
+
+  // Total token count
+  console.log(response.usageMetadata.totalTokenCount);
+  // Example response:
+  //  1525
+  return response.text;
+}
+// [END googlegenaisdk_thinking_budget_with_txt]
+
+module.exports = {
+  generateWithThoughts,
+};
diff --git a/genai/thinking/thinking-includethoughts-with-txt.js b/genai/thinking/thinking-includethoughts-with-txt.js
new file mode 100644
index 0000000000..ff0b5e7fef
--- /dev/null
+++ b/genai/thinking/thinking-includethoughts-with-txt.js
@@ -0,0 +1,98 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+// [START googlegenaisdk_thinking_includethoughts_with_txt]
+const {GoogleGenAI} = require('@google/genai');
+
+const GOOGLE_CLOUD_PROJECT = process.env.GOOGLE_CLOUD_PROJECT;
+const GOOGLE_CLOUD_LOCATION = process.env.GOOGLE_CLOUD_LOCATION || 'global';
+
+async function generateWithThoughts(
+  projectId = GOOGLE_CLOUD_PROJECT,
+  location = GOOGLE_CLOUD_LOCATION
+) {
+  const client = new GoogleGenAI({
+    vertexai: true,
+    project: projectId,
+    location: location,
+  });
+
+  const response = await client.models.generateContent({
+    model: 'gemini-2.5-pro',
+    contents: 'solve x^2 + 4x + 4 = 0',
+    config: {
+      thinkingConfig: {
+        includeThoughts: true,
+      },
+    },
+  });
+
+  console.log(response.text);
+  // Example Response:
+  //  Okay, let's solve the quadratic equation x² + 4x + 4 = 0.
+  //  ...
+  //  **Answer:**
+  //  The solution to the equation x² + 4x + 4 = 0 is x = -2. This is a repeated root (or a root with multiplicity 2).
+
+  for (const part of response.candidates[0].content.parts) {
+    if (part && part.thought) {
+      console.log(part.text);
+    }
+  }
+
+  // Example Response:
+  // **My Thought Process for Solving the Quadratic Equation**
+  //
+  // Alright, let's break down this quadratic, x² + 4x + 4 = 0. First things first:
+  // it's a quadratic; the x² term gives it away, and we know the general form is
+  // ax² + bx + c = 0.
+  //
+  // So, let's identify the coefficients: a = 1, b = 4, and c = 4. Now, what's the
+  // most efficient path to the solution? My gut tells me to try factoring; it's
+  // often the fastest route if it works. If that fails, I'll default to the quadratic
+  // formula, which is foolproof. Completing the square? It's good for deriving the
+  // formula or when factoring is difficult, but not usually my first choice for
+  // direct solving, but it can't hurt to keep it as an option.
+  //
+  // Factoring, then. I need to find two numbers that multiply to 'c' (4) and add
+  // up to 'b' (4). Let's see... 1 and 4 don't work (add up to 5). 2 and 2? Bingo!
+  // They multiply to 4 and add up to 4. This means I can rewrite the equation as
+  // (x + 2)(x + 2) = 0, or more concisely, (x + 2)² = 0. Solving for x is now
+  // trivial: x + 2 = 0, thus x = -2.
+  //
+  // Okay, just to be absolutely certain, I'll run the quadratic formula just to
+  // double-check. x = [-b ± √(b² - 4ac)] / 2a. Plugging in the values, x = [-4 ±
+  // √(4² - 4 * 1 * 4)] / (2 * 1). That simplifies to x = [-4 ± √0] / 2. So, x =
+  // -2 again – a repeated root. Nice.
+  //
+  // Now, let's check via completing the square. Starting from the same equation,
+  // (x² + 4x) = -4. Take half of the b-value (4/2 = 2), square it (2² = 4), and
+  // add it to both sides, so x² + 4x + 4 = -4 + 4. Which simplifies into (x + 2)²
+  // = 0. The square root on both sides gives us x + 2 = 0, therefore x = -2, as
+  //  expected.
+  //
+  // Always, *always* confirm! Let's substitute x = -2 back into the original
+  // equation: (-2)² + 4(-2) + 4 = 0. That's 4 - 8 + 4 = 0. It checks out.
+  //
+  // Conclusion: the solution is x = -2. Confirmed.
+
+  return response.text;
+}
+// [END googlegenaisdk_thinking_includethoughts_with_txt]
+
+module.exports = {
+  generateWithThoughts,
+};
diff --git a/genai/thinking/thinking-with-txt.js b/genai/thinking/thinking-with-txt.js
new file mode 100644
index 0000000000..babaa00320
--- /dev/null
+++ b/genai/thinking/thinking-with-txt.js
@@ -0,0 +1,98 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+// [START googlegenaisdk_thinking_with_txt]
+const {GoogleGenAI} = require('@google/genai');
+
+const GOOGLE_CLOUD_PROJECT = process.env.GOOGLE_CLOUD_PROJECT;
+const GOOGLE_CLOUD_LOCATION = process.env.GOOGLE_CLOUD_LOCATION || 'global';
+
+async function generateWithThoughts(
+  projectId = GOOGLE_CLOUD_PROJECT,
+  location = GOOGLE_CLOUD_LOCATION
+) {
+  const client = new GoogleGenAI({
+    vertexai: true,
+    project: projectId,
+    location: location,
+  });
+
+  const response = await client.models.generateContent({
+    model: 'gemini-2.5-pro',
+    contents: 'solve x^2 + 4x + 4 = 0',
+  });
+
+  console.log(response.text);
+
+  // Example Response:
+  //     Okay, let's solve the quadratic equation x² + 4x + 4 = 0.
+  //
+  //     We can solve this equation by factoring, using the quadratic formula,
+  //     or by recognizing it as a perfect square trinomial.
+  //
+  //     **Method 1: Factoring**
+  //
+  //     1.  We need two numbers that multiply to the constant term (4)
+  //         and add up to the coefficient of the x term (4).
+  //     2.  The numbers 2 and 2 satisfy these conditions: 2 * 2 = 4 and 2 + 2 = 4.
+  //     3.  So, we can factor the quadratic as:
+  //             (x + 2)(x + 2) = 0
+  //             or
+  //             (x + 2)² = 0
+  //     4.  For the product to be zero, the factor must be zero:
+  //             x + 2 = 0
+  //     5.  Solve for x:
+  //             x = -2
+  //
+  //     **Method 2: Quadratic Formula**
+  //
+  //     The quadratic formula for an equation ax² + bx + c = 0 is:
+  //         x = [-b ± sqrt(b² - 4ac)] / (2a)
+  //
+  //     1.  In our equation x² + 4x + 4 = 0, we have a = 1, b = 4, and c = 4.
+  //     2.  Substitute these values into the formula:
+  //             x = [-4 ± sqrt(4² - 4 * 1 * 4)] / (2 * 1)
+  //             x = [-4 ± sqrt(16 - 16)] / 2
+  //             x = [-4 ± sqrt(0)] / 2
+  //             x = [-4 ± 0] / 2
+  //             x = -4 / 2
+  //             x = -2
+  //
+  //     **Method 3: Perfect Square Trinomial**
+  //
+  //     1.  Notice that the expression x² + 4x + 4 fits the pattern of a perfect square trinomial:
+  //         a² + 2ab + b², where a = x and b = 2.
+  //     2.  We can rewrite the equation as:
+  //             (x + 2)² = 0
+  //     3.  Take the square root of both sides:
+  //             x + 2 = 0
+  //     4.  Solve for x:
+  //             x = -2
+  //
+  //     All methods lead to the same solution.
+  //
+  //     **Answer:**
+  //     The solution to the equation x² + 4x + 4 = 0 is x = -2.
+  //     This is a repeated root (or a root with multiplicity 2).
+
+  return response.text;
+}
+
+// [END googlegenaisdk_thinking_with_txt]
+
+module.exports = {
+  generateWithThoughts,
+};