diff --git a/tests/api-resources/beta/messages/batches.test.ts b/tests/api-resources/beta/messages/batches.test.ts
index ed2027c8..e395910a 100644
--- a/tests/api-resources/beta/messages/batches.test.ts
+++ b/tests/api-resources/beta/messages/batches.test.ts
@@ -20,22 +20,6 @@ describe('resource batches', () => {
             model: 'claude-3-5-sonnet-20241022',
           },
         },
-        {
-          custom_id: 'my-custom-id-1',
-          params: {
-            max_tokens: 1024,
-            messages: [{ content: 'Hello, world', role: 'user' }],
-            model: 'claude-3-5-sonnet-20241022',
-          },
-        },
-        {
-          custom_id: 'my-custom-id-1',
-          params: {
-            max_tokens: 1024,
-            messages: [{ content: 'Hello, world', role: 'user' }],
-            model: 'claude-3-5-sonnet-20241022',
-          },
-        },
       ],
     });
     const rawResponse = await responsePromise.asResponse();
@@ -57,143 +41,7 @@ describe('resource batches', () => {
             messages: [{ content: 'Hello, world', role: 'user' }],
             model: 'claude-3-5-sonnet-20241022',
             metadata: { user_id: '13803d75-b4b5-4c3e-b2a2-6f21399b021b' },
-            stop_sequences: ['string', 'string', 'string'],
-            stream: false,
-            system: [
-              { text: "Today's date is 2024-06-01.", type: 'text', cache_control: { type: 'ephemeral' } },
-            ],
-            temperature: 1,
-            tool_choice: { type: 'auto', disable_parallel_tool_use: true },
-            tools: [
-              {
-                input_schema: {
-                  type: 'object',
-                  properties: {
-                    location: { description: 'The city and state, e.g. San Francisco, CA', type: 'string' },
-                    unit: {
-                      description: 'Unit for the output - one of (celsius, fahrenheit)',
-                      type: 'string',
-                    },
-                  },
-                },
-                name: 'x',
-                cache_control: { type: 'ephemeral' },
-                description: 'Get the current weather in a given location',
-                type: 'custom',
-              },
-              {
-                input_schema: {
-                  type: 'object',
-                  properties: {
-                    location: { description: 'The city and state, e.g. San Francisco, CA', type: 'string' },
-                    unit: {
-                      description: 'Unit for the output - one of (celsius, fahrenheit)',
-                      type: 'string',
-                    },
-                  },
-                },
-                name: 'x',
-                cache_control: { type: 'ephemeral' },
-                description: 'Get the current weather in a given location',
-                type: 'custom',
-              },
-              {
-                input_schema: {
-                  type: 'object',
-                  properties: {
-                    location: { description: 'The city and state, e.g. San Francisco, CA', type: 'string' },
-                    unit: {
-                      description: 'Unit for the output - one of (celsius, fahrenheit)',
-                      type: 'string',
-                    },
-                  },
-                },
-                name: 'x',
-                cache_control: { type: 'ephemeral' },
-                description: 'Get the current weather in a given location',
-                type: 'custom',
-              },
-            ],
-            top_k: 5,
-            top_p: 0.7,
-          },
-        },
-        {
-          custom_id: 'my-custom-id-1',
-          params: {
-            max_tokens: 1024,
-            messages: [{ content: 'Hello, world', role: 'user' }],
-            model: 'claude-3-5-sonnet-20241022',
-            metadata: { user_id: '13803d75-b4b5-4c3e-b2a2-6f21399b021b' },
-            stop_sequences: ['string', 'string', 'string'],
-            stream: false,
-            system: [
-              { text: "Today's date is 2024-06-01.", type: 'text', cache_control: { type: 'ephemeral' } },
-            ],
-            temperature: 1,
-            tool_choice: { type: 'auto', disable_parallel_tool_use: true },
-            tools: [
-              {
-                input_schema: {
-                  type: 'object',
-                  properties: {
-                    location: { description: 'The city and state, e.g. San Francisco, CA', type: 'string' },
-                    unit: {
-                      description: 'Unit for the output - one of (celsius, fahrenheit)',
-                      type: 'string',
-                    },
-                  },
-                },
-                name: 'x',
-                cache_control: { type: 'ephemeral' },
-                description: 'Get the current weather in a given location',
-                type: 'custom',
-              },
-              {
-                input_schema: {
-                  type: 'object',
-                  properties: {
-                    location: { description: 'The city and state, e.g. San Francisco, CA', type: 'string' },
-                    unit: {
-                      description: 'Unit for the output - one of (celsius, fahrenheit)',
-                      type: 'string',
-                    },
-                  },
-                },
-                name: 'x',
-                cache_control: { type: 'ephemeral' },
-                description: 'Get the current weather in a given location',
-                type: 'custom',
-              },
-              {
-                input_schema: {
-                  type: 'object',
-                  properties: {
-                    location: { description: 'The city and state, e.g. San Francisco, CA', type: 'string' },
-                    unit: {
-                      description: 'Unit for the output - one of (celsius, fahrenheit)',
-                      type: 'string',
-                    },
-                  },
-                },
-                name: 'x',
-                cache_control: { type: 'ephemeral' },
-                description: 'Get the current weather in a given location',
-                type: 'custom',
-              },
-            ],
-            top_k: 5,
-            top_p: 0.7,
-          },
-        },
-        {
-          custom_id: 'my-custom-id-1',
-          params: {
-            max_tokens: 1024,
-            messages: [{ content: 'Hello, world', role: 'user' }],
-            model: 'claude-3-5-sonnet-20241022',
-            metadata: { user_id: '13803d75-b4b5-4c3e-b2a2-6f21399b021b' },
-            stop_sequences: ['string', 'string', 'string'],
+            stop_sequences: ['string'],
             stream: false,
             system: [
               { text: "Today's date is 2024-06-01.", type: 'text', cache_control: { type: 'ephemeral' } },
@@ -217,45 +65,13 @@ describe('resource batches', () => {
                 description: 'Get the current weather in a given location',
                 type: 'custom',
               },
-              {
-                input_schema: {
-                  type: 'object',
-                  properties: {
-                    location: { description: 'The city and state, e.g. San Francisco, CA', type: 'string' },
-                    unit: {
-                      description: 'Unit for the output - one of (celsius, fahrenheit)',
-                      type: 'string',
-                    },
-                  },
-                },
-                name: 'x',
-                cache_control: { type: 'ephemeral' },
-                description: 'Get the current weather in a given location',
-                type: 'custom',
-              },
-              {
-                input_schema: {
-                  type: 'object',
-                  properties: {
-                    location: { description: 'The city and state, e.g. San Francisco, CA', type: 'string' },
-                    unit: {
-                      description: 'Unit for the output - one of (celsius, fahrenheit)',
-                      type: 'string',
-                    },
-                  },
-                },
-                name: 'x',
-                cache_control: { type: 'ephemeral' },
-                description: 'Get the current weather in a given location',
-                type: 'custom',
-              },
             ],
             top_k: 5,
             top_p: 0.7,
           },
         },
       ],
-      betas: ['string', 'string', 'string'],
+      betas: ['string'],
     });
   });
 
@@ -282,7 +98,7 @@ describe('resource batches', () => {
     await expect(
       client.beta.messages.batches.retrieve(
         'message_batch_id',
-        { betas: ['string', 'string', 'string'] },
+        { betas: ['string'] },
         { path: '/_stainless_unknown_path' },
       ),
     ).rejects.toThrow(Anthropic.NotFoundError);
@@ -310,7 +126,7 @@ describe('resource batches', () => {
     // ensure the request options are being passed correctly by passing an invalid HTTP method in order to cause an error
     await expect(
       client.beta.messages.batches.list(
-        { after_id: 'after_id', before_id: 'before_id', limit: 1, betas: ['string', 'string', 'string'] },
+        { after_id: 'after_id', before_id: 'before_id', limit: 1, betas: ['string'] },
         { path: '/_stainless_unknown_path' },
       ),
     ).rejects.toThrow(Anthropic.NotFoundError);
@@ -339,7 +155,7 @@ describe('resource batches', () => {
     await expect(
       client.beta.messages.batches.cancel(
         'message_batch_id',
-        { betas: ['string', 'string', 'string'] },
+        { betas: ['string'] },
         { path: '/_stainless_unknown_path' },
       ),
     ).rejects.toThrow(Anthropic.NotFoundError);
@@ -357,7 +173,7 @@ describe('resource batches', () => {
     await expect(
       client.beta.messages.batches.results(
         'message_batch_id',
-        { betas: ['string', 'string', 'string'] },
+        { betas: ['string'] },
         { path: '/_stainless_unknown_path' },
       ),
     ).rejects.toThrow(Anthropic.NotFoundError);
diff --git a/tests/api-resources/beta/messages/messages.test.ts b/tests/api-resources/beta/messages/messages.test.ts
index 64b6299c..ec73d9c0 100644
--- a/tests/api-resources/beta/messages/messages.test.ts
+++ b/tests/api-resources/beta/messages/messages.test.ts
@@ -30,7 +30,7 @@ describe('resource messages', () => {
       messages: [{ content: 'Hello, world', role: 'user' }],
       model: 'claude-3-5-sonnet-20241022',
       metadata: { user_id: '13803d75-b4b5-4c3e-b2a2-6f21399b021b' },
-      stop_sequences: ['string', 'string', 'string'],
+      stop_sequences: ['string'],
       stream: false,
       system: [{ text: "Today's date is 2024-06-01.", type: 'text', cache_control: { type: 'ephemeral' } }],
       temperature: 1,
@@ -49,46 +49,16 @@ describe('resource messages', () => {
           description: 'Get the current weather in a given location',
           type: 'custom',
         },
-        {
-          input_schema: {
-            type: 'object',
-            properties: {
-              location: { description: 'The city and state, e.g. San Francisco, CA', type: 'string' },
-              unit: { description: 'Unit for the output - one of (celsius, fahrenheit)', type: 'string' },
-            },
-          },
-          name: 'x',
-          cache_control: { type: 'ephemeral' },
-          description: 'Get the current weather in a given location',
-          type: 'custom',
-        },
-        {
-          input_schema: {
-            type: 'object',
-            properties: {
-              location: { description: 'The city and state, e.g. San Francisco, CA', type: 'string' },
-              unit: { description: 'Unit for the output - one of (celsius, fahrenheit)', type: 'string' },
-            },
-          },
-          name: 'x',
-          cache_control: { type: 'ephemeral' },
-          description: 'Get the current weather in a given location',
-          type: 'custom',
-        },
       ],
       top_k: 5,
       top_p: 0.7,
-      betas: ['string', 'string', 'string'],
+      betas: ['string'],
     });
   });
 
   test('countTokens: only required params', async () => {
     const responsePromise = client.beta.messages.countTokens({
-      messages: [
-        { content: 'string', role: 'user' },
-        { content: 'string', role: 'user' },
-        { content: 'string', role: 'user' },
-      ],
+      messages: [{ content: 'string', role: 'user' }],
       model: 'string',
     });
     const rawResponse = await responsePromise.asResponse();
@@ -102,11 +72,7 @@ describe('resource messages', () => {
 
   test('countTokens: required and optional params', async () => {
     const response = await client.beta.messages.countTokens({
-      messages: [
-        { content: 'string', role: 'user' },
-        { content: 'string', role: 'user' },
-        { content: 'string', role: 'user' },
-      ],
+      messages: [{ content: 'string', role: 'user' }],
       model: 'string',
       system: [{ text: "Today's date is 2024-06-01.", type: 'text', cache_control: { type: 'ephemeral' } }],
       tool_choice: { type: 'auto', disable_parallel_tool_use: true },
@@ -124,34 +90,8 @@ describe('resource messages', () => {
           description: 'Get the current weather in a given location',
           type: 'custom',
         },
-        {
-          input_schema: {
-            type: 'object',
-            properties: {
-              location: { description: 'The city and state, e.g. San Francisco, CA', type: 'string' },
-              unit: { description: 'Unit for the output - one of (celsius, fahrenheit)', type: 'string' },
-            },
-          },
-          name: 'x',
-          cache_control: { type: 'ephemeral' },
-          description: 'Get the current weather in a given location',
-          type: 'custom',
-        },
-        {
-          input_schema: {
-            type: 'object',
-            properties: {
-              location: { description: 'The city and state, e.g. San Francisco, CA', type: 'string' },
-              unit: { description: 'Unit for the output - one of (celsius, fahrenheit)', type: 'string' },
-            },
-          },
-          name: 'x',
-          cache_control: { type: 'ephemeral' },
-          description: 'Get the current weather in a given location',
-          type: 'custom',
-        },
       ],
-      betas: ['string', 'string', 'string'],
+      betas: ['string'],
     });
   });
 });
diff --git a/tests/api-resources/beta/prompt-caching/messages.test.ts b/tests/api-resources/beta/prompt-caching/messages.test.ts
index dd94b3a7..39ecdfab 100644
--- a/tests/api-resources/beta/prompt-caching/messages.test.ts
+++ b/tests/api-resources/beta/prompt-caching/messages.test.ts
@@ -30,7 +30,7 @@ describe('resource messages', () => {
       messages: [{ content: 'Hello, world', role: 'user' }],
       model: 'claude-3-5-sonnet-20241022',
       metadata: { user_id: '13803d75-b4b5-4c3e-b2a2-6f21399b021b' },
-      stop_sequences: ['string', 'string', 'string'],
+      stop_sequences: ['string'],
       stream: false,
       system: [{ text: "Today's date is 2024-06-01.", type: 'text', cache_control: { type: 'ephemeral' } }],
       temperature: 1,
@@ -48,34 +48,10 @@ describe('resource messages', () => {
           cache_control: { type: 'ephemeral' },
           description: 'Get the current weather in a given location',
         },
-        {
-          input_schema: {
-            type: 'object',
-            properties: {
-              location: { description: 'The city and state, e.g. San Francisco, CA', type: 'string' },
-              unit: { description: 'Unit for the output - one of (celsius, fahrenheit)', type: 'string' },
-            },
-          },
-          name: 'x',
-          cache_control: { type: 'ephemeral' },
-          description: 'Get the current weather in a given location',
-        },
-        {
-          input_schema: {
-            type: 'object',
-            properties: {
-              location: { description: 'The city and state, e.g. San Francisco, CA', type: 'string' },
-              unit: { description: 'Unit for the output - one of (celsius, fahrenheit)', type: 'string' },
-            },
-          },
-          name: 'x',
-          cache_control: { type: 'ephemeral' },
-          description: 'Get the current weather in a given location',
-        },
       ],
       top_k: 5,
       top_p: 0.7,
-      betas: ['string', 'string', 'string'],
+      betas: ['string'],
     });
   });
 });
diff --git a/tests/api-resources/completions.test.ts b/tests/api-resources/completions.test.ts
index aa326cf2..fcd0a68c 100644
--- a/tests/api-resources/completions.test.ts
+++ b/tests/api-resources/completions.test.ts
@@ -30,7 +30,7 @@ describe('resource completions', () => {
       model: 'string',
       prompt: '\n\nHuman: Hello, world!\n\nAssistant:',
       metadata: { user_id: '13803d75-b4b5-4c3e-b2a2-6f21399b021b' },
-      stop_sequences: ['string', 'string', 'string'],
+      stop_sequences: ['string'],
       stream: false,
       temperature: 1,
       top_k: 5,
diff --git a/tests/api-resources/messages.test.ts b/tests/api-resources/messages.test.ts
index 0497742e..17ae6e52 100644
--- a/tests/api-resources/messages.test.ts
+++ b/tests/api-resources/messages.test.ts
@@ -30,7 +30,7 @@ describe('resource messages', () => {
       messages: [{ content: 'Hello, world', role: 'user' }],
       model: 'claude-3-5-sonnet-20241022',
       metadata: { user_id: '13803d75-b4b5-4c3e-b2a2-6f21399b021b' },
-      stop_sequences: ['string', 'string', 'string'],
+      stop_sequences: ['string'],
       stream: false,
       system: [{ text: "Today's date is 2024-06-01.", type: 'text' }],
       temperature: 1,
@@ -47,28 +47,6 @@ describe('resource messages', () => {
           name: 'x',
           description: 'Get the current weather in a given location',
         },
-        {
-          input_schema: {
-            type: 'object',
-            properties: {
-              location: { description: 'The city and state, e.g. San Francisco, CA', type: 'string' },
-              unit: { description: 'Unit for the output - one of (celsius, fahrenheit)', type: 'string' },
-            },
-          },
-          name: 'x',
-          description: 'Get the current weather in a given location',
-        },
-        {
-          input_schema: {
-            type: 'object',
-            properties: {
-              location: { description: 'The city and state, e.g. San Francisco, CA', type: 'string' },
-              unit: { description: 'Unit for the output - one of (celsius, fahrenheit)', type: 'string' },
-            },
-          },
-          name: 'x',
-          description: 'Get the current weather in a given location',
-        },
       ],
       top_k: 5,
       top_p: 0.7,