feat(anthropic): effort param and testapp

js/plugins/anthropic/src/models.ts

@@ -123,7 +123,14 @@ export const KNOWN_CLAUDE_MODELS: Record<
   ),
   'claude-opus-4-5': commonRef(
     'claude-opus-4-5',
-    AnthropicThinkingConfigSchema,
+    AnthropicThinkingConfigSchema.extend({
+      output_config: z
+        .object({
+          effort: z.enum(['low', 'medium', 'high']).optional(),
+        })
+        .passthrough()
+        .optional(),
+    }),
     {
       supports: {
         multiturn: true,

js/plugins/anthropic/src/runner/beta.ts

@@ -84,7 +84,7 @@ const BETA_APIS = [
   // 'context-management-2025-06-27',
   // 'model-context-window-exceeded-2025-08-26',
   // 'skills-2025-10-02',
-  // 'effort-param-2025-11-24',
+  'effort-2025-11-24',
   // 'advanced-tool-use-2025-11-20',
   'structured-outputs-2025-11-13',
 ];
@@ -308,6 +308,9 @@ export class BetaRunner extends BaseRunner<BetaRunnerTypes> {
     };
 
     if (betaSystem !== undefined) body.system = betaSystem;
+    if (request.config?.output_config !== undefined)
+      body.output_config = request.config
+        .output_config as BetaMessageCreateParamsNonStreaming['output_config'];
     if (request.config?.stopSequences !== undefined)
       body.stop_sequences = request.config.stopSequences;
     if (request.config?.temperature !== undefined)
@@ -379,6 +382,9 @@ export class BetaRunner extends BaseRunner<BetaRunnerTypes> {
     };
 
     if (betaSystem !== undefined) body.system = betaSystem;
+    if (request.config?.output_config !== undefined)
+      body.output_config = request.config
+        .output_config as BetaMessageCreateParamsStreaming['output_config'];
     if (request.config?.stopSequences !== undefined)
       body.stop_sequences = request.config.stopSequences;
     if (request.config?.temperature !== undefined)

js/testapps/anthropic/package.json

@@ -10,6 +10,7 @@
     "start:beta": "node lib/beta/basic.js",
     "dev:stable": "genkit start -- npx tsx --watch src/stable/basic.ts",
     "dev:beta": "genkit start -- npx tsx --watch src/beta/basic.ts",
+    "dev:beta:effort": "genkit start -- npx tsx --watch src/beta/effort.ts",
     "dev:stable:text-plain": "genkit start -- npx tsx --watch src/stable/text-plain.ts",
     "dev:stable:webp": "genkit start -- npx tsx --watch src/stable/webp.ts",
     "dev:stable:pdf": "genkit start -- npx tsx --watch src/stable/pdf.ts",

js/testapps/anthropic/src/beta/effort.ts

@@ -0,0 +1,79 @@
+/**
+ * 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
+ *
+ *     http://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.
+ */
+
+import { anthropic } from '@genkit-ai/anthropic';
+import { genkit } from 'genkit';
+
+const ai = genkit({
+  plugins: [
+    // Default all flows in this sample to the beta surface
+    anthropic({
+      apiVersion: 'beta',
+      cacheSystemPrompt: true,
+      apiKey: process.env.ANTHROPIC_API_KEY,
+    }),
+  ],
+});
+
+const betaOpus45 = anthropic.model('claude-opus-4-5', { apiVersion: 'beta' });
+
+ai.defineFlow('anthropic-beta-low-effort', async () => {
+  const { text } = await ai.generate({
+    model: betaOpus45,
+    prompt: `Create me a Mathematics class using the programming language Python.`,
+    config: {
+      maxOutputTokens: 4096,
+      temperature: 0.6,
+      output_config: {
+        effort: 'low',
+      },
+    },
+  });
+
+  return text;
+});
+
+ai.defineFlow('anthropic-beta-medium-effort', async () => {
+  const { text } = await ai.generate({
+    model: betaOpus45,
+    prompt: `Create me a Mathematics class using the programming language Python.`,
+    config: {
+      maxOutputTokens: 4096,
+      temperature: 0.6,
+      output_config: {
+        effort: 'medium',
+      },
+    },
+  });
+
+  return text;
+});
+
+ai.defineFlow('anthropic-beta-high-effort', async () => {
+  const { text } = await ai.generate({
+    model: betaOpus45,
+    prompt: `Create me a Mathematics class using the programming language Python.`,
+    config: {
+      maxOutputTokens: 4096,
+      temperature: 0.6,
+      output_config: {
+        effort: 'high',
+      },
+    },
+  });
+
+  return text;
+});