diff --git a/package.json b/package.json
index 3a7699d..0526410 100644
--- a/package.json
+++ b/package.json
@@ -53,6 +53,7 @@
   "dependencies": {
     "@ai-sdk/anthropic": "^2.0.45",
     "@ai-sdk/google": "^2.0.39",
+    "@ai-sdk/openai": "^2.0.71",
     "@anthropic-ai/sdk": "^0.68.0",
     "@axe-core/puppeteer": "^4.10.2",
     "@genkit-ai/compat-oai": "1.23.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index f0c1046..16ea310 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -14,6 +14,9 @@ importers:
       '@ai-sdk/google':
         specifier: ^2.0.39
         version: 2.0.39(zod@3.25.76)
+      '@ai-sdk/openai':
+        specifier: ^2.0.71
+        version: 2.0.71(zod@3.25.76)
       '@anthropic-ai/sdk':
         specifier: ^0.68.0
         version: 0.68.0(zod@3.25.76)
@@ -268,6 +271,12 @@ packages:
     peerDependencies:
       zod: ^3.25.76 || ^4.1.8
 
+  '@ai-sdk/openai@2.0.71':
+    resolution: {integrity: sha512-tg+gj+R0z/On9P4V7hy7/7o04cQPjKGayMCL3gzWD/aNGjAKkhEnaocuNDidSnghizt8g2zJn16cAuAolnW+qQ==}
+    engines: {node: '>=18'}
+    peerDependencies:
+      zod: ^3.25.76 || ^4.1.8
+
   '@ai-sdk/provider-utils@3.0.17':
     resolution: {integrity: sha512-TR3Gs4I3Tym4Ll+EPdzRdvo/rc8Js6c4nVhFLuvGLX/Y4V9ZcQMa/HTiYsHEgmYrf1zVi6Q145UEZUfleOwOjw==}
     engines: {node: '>=18'}
@@ -7404,6 +7413,12 @@ snapshots:
       '@ai-sdk/provider-utils': 3.0.17(zod@3.25.76)
       zod: 3.25.76
 
+  '@ai-sdk/openai@2.0.71(zod@3.25.76)':
+    dependencies:
+      '@ai-sdk/provider': 2.0.0
+      '@ai-sdk/provider-utils': 3.0.17(zod@3.25.76)
+      zod: 3.25.76
+
   '@ai-sdk/provider-utils@3.0.17(zod@3.25.76)':
     dependencies:
       '@ai-sdk/provider': 2.0.0
diff --git a/runner/codegen/ai-sdk-runner.ts b/runner/codegen/ai-sdk-runner.ts
index db2d6f1..c033e34 100644
--- a/runner/codegen/ai-sdk-runner.ts
+++ b/runner/codegen/ai-sdk-runner.ts
@@ -19,6 +19,7 @@ import {
 } from 'ai';
 import {google, GoogleGenerativeAIProviderOptions} from '@ai-sdk/google';
 import {anthropic, AnthropicProviderOptions} from '@ai-sdk/anthropic';
+import {openai, OpenAIResponsesProviderOptions} from '@ai-sdk/openai';
 import z from 'zod';
 import {callWithTimeout} from '../utils/timeout.js';
 import {combineAbortSignals} from '../utils/abort-signal.js';
@@ -32,6 +33,10 @@ const SUPPORTED_MODELS = [
   'gemini-2.5-flash',
   'gemini-2.5-pro',
   'gemini-3-pro-preview',
+  'gpt-5.1-no-thinking',
+  'gpt-5.1-thinking-low',
+  'gpt-5.1-thinking-high',
+  'gpt-5.1-thinking-medium',
 ] as const;
 
 // Increased to a very high value as we rely on an actual timeout
@@ -133,9 +138,13 @@ export class AiSDKRunner implements LlmRunner {
     );
   }
 
-  private async _getAiSdkModelOptions(
-    request: LocalLlmGenerateTextRequestOptions,
-  ): Promise<{model: LanguageModel; providerOptions: {}}> {
+  private async _getAiSdkModelOptions(request: LocalLlmGenerateTextRequestOptions): Promise<{
+    model: LanguageModel;
+    providerOptions:
+      | {anthropic: AnthropicProviderOptions}
+      | {google: GoogleGenerativeAIProviderOptions}
+      | {openai: OpenAIResponsesProviderOptions};
+  }> {
     const modelName = request.model as (typeof SUPPORTED_MODELS)[number];
     switch (modelName) {
       case 'claude-opus-4.1-no-thinking':
@@ -144,9 +153,11 @@ export class AiSDKRunner implements LlmRunner {
         return {
           model: anthropic('claude-opus-4-1'),
           providerOptions: {
-            sendReasoning: thinkingEnabled,
-            thinking: {type: thinkingEnabled ? 'enabled' : 'disabled'},
-          } satisfies AnthropicProviderOptions,
+            anthropic: {
+              sendReasoning: thinkingEnabled,
+              thinking: {type: thinkingEnabled ? 'enabled' : 'disabled'},
+            } satisfies AnthropicProviderOptions,
+          },
         };
       }
       case 'claude-sonnet-4.5-no-thinking':
@@ -155,9 +166,11 @@ export class AiSDKRunner implements LlmRunner {
         return {
           model: anthropic('claude-sonnet-4-5'),
           providerOptions: {
-            sendReasoning: thinkingEnabled,
-            thinking: {type: thinkingEnabled ? 'enabled' : 'disabled'},
-          } satisfies AnthropicProviderOptions,
+            anthropic: {
+              sendReasoning: thinkingEnabled,
+              thinking: {type: thinkingEnabled ? 'enabled' : 'disabled'},
+            } satisfies AnthropicProviderOptions,
+          },
         };
       }
       case 'gemini-2.5-flash-lite':
@@ -167,10 +180,33 @@ export class AiSDKRunner implements LlmRunner {
         return {
           model: google(modelName),
           providerOptions: {
-            thinkingConfig: {
-              includeThoughts: request.thinkingConfig?.includeThoughts,
-            },
-          } satisfies GoogleGenerativeAIProviderOptions,
+            google: {
+              thinkingConfig: {
+                includeThoughts: request.thinkingConfig?.includeThoughts,
+              },
+            } satisfies GoogleGenerativeAIProviderOptions,
+          },
+        };
+      case 'gpt-5.1-no-thinking':
+      case 'gpt-5.1-thinking-low':
+      case 'gpt-5.1-thinking-medium':
+      case 'gpt-5.1-thinking-high':
+        let reasoningEffort: string = 'none';
+        if (modelName === 'gpt-5.1-thinking-high') {
+          reasoningEffort = 'high';
+        } else if (modelName === 'gpt-5.1-thinking-medium') {
+          reasoningEffort = 'medium';
+        } else if (modelName === 'gpt-5.1-thinking-low') {
+          reasoningEffort = 'low';
+        }
+        return {
+          model: openai('gpt-5.1'),
+          providerOptions: {
+            openai: {
+              reasoningEffort,
+              reasoningSummary: 'detailed',
+            } satisfies OpenAIResponsesProviderOptions,
+          },
         };
       default:
         throw new Error(`Unexpected model in AI SDK runner: ${request.model}.`);