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tsuzaki430vercel-ai-sdk[bot]
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Backport conflicts for PR #9669 to release-v5.0
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‎.changeset/shaggy-zebras-fetch.md‎

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---
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'@ai-sdk/anthropic': patch
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---
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add return `file_id` property for anthropic code-execution-20250825 to download output files.

‎examples/ai-core/src/generate-text/anthropic-code-execution-20250825-downloads.ts‎

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import { anthropic } from '@ai-sdk/anthropic';
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import { generateText } from 'ai';
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import { run } from '../lib/run';
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import * as fs from 'fs';
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run(async () => {
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const result = await generateText({
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model: anthropic('claude-sonnet-4-5'),
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prompt:
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'Write a Python script to calculate fibonacci number' +
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' and then execute it to find the 10th fibonacci number' +
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' finally output data to excel file and python code.',
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tools: {
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code_execution: anthropic.tools.codeExecution_20250825(),
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},
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});
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console.dir(result.content, { depth: Infinity });
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const fileIdList = result.staticToolResults.flatMap(t => {
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if (
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t.toolName === 'code_execution' &&
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t.output.type === 'bash_code_execution_result'
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) {
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return t.output.content.map(o => o.file_id);
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}
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return [];
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});
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await Promise.all(fileIdList.map(fileId => downloadFile(fileId)));
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});
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async function downloadFile(file: string) {
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try {
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const apiKey = process.env.ANTHROPIC_API_KEY;
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if (!apiKey) {
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throw new Error('ANTHROPIC_API_KEY is not set');
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}
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const infoUrl = `https://api.anthropic.com/v1/files/${file}`;
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const infoPromise = fetch(infoUrl, {
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method: 'GET',
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headers: {
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'x-api-key': apiKey,
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'anthropic-version': '2023-06-01',
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'anthropic-beta': 'files-api-2025-04-14',
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},
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});
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const downloadUrl = `https://api.anthropic.com/v1/files/${file}/content`;
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const downloadPromise = fetch(downloadUrl, {
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method: 'GET',
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headers: {
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'x-api-key': apiKey,
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'anthropic-version': '2023-06-01',
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'anthropic-beta': 'files-api-2025-04-14',
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},
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});
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const [infoResponse, downloadResponse] = await Promise.all([
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infoPromise,
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downloadPromise,
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]);
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if (!infoResponse.ok) {
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throw new Error(
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`HTTP Error: ${infoResponse.status} ${infoResponse.statusText}`,
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);
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}
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const {
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filename,
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}: {
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type: 'file';
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id: string;
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size_bytes: number;
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created_at: Date;
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filename: string;
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mime_type: string;
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downloadable?: boolean;
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} = await infoResponse.json();
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if (!downloadResponse.ok) {
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throw new Error(
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`HTTP Error: ${downloadResponse.status} ${downloadResponse.statusText}`,
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);
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}
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// get as binary data
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const arrayBuffer = await downloadResponse.arrayBuffer();
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const buffer = Buffer.from(arrayBuffer);
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const outputPath = `output/${filename}`;
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fs.writeFileSync(outputPath, buffer);
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console.log(`file saved: ${outputPath}`);
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console.log(`file size: ${buffer.length} bytes`);
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return {
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path: outputPath,
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size: buffer.length,
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};
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} catch (error) {
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console.error('error:', error);
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throw error;
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}
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}

‎examples/ai-core/src/stream-text/anthropic-code-execution-20250825-downloads.ts‎

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import { anthropic } from '@ai-sdk/anthropic';
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import { streamText } from 'ai';
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import { run } from '../lib/run';
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import * as fs from 'fs';
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run(async () => {
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const result = streamText({
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model: anthropic('claude-sonnet-4-5'),
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prompt:
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'Write a Python script to calculate fibonacci number' +
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' and then execute it to find the 10th fibonacci number' +
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' finally output data to excel file and python code.',
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tools: {
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code_execution: anthropic.tools.codeExecution_20250825(),
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},
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});
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for await (const part of result.fullStream) {
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switch (part.type) {
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case 'text-delta': {
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process.stdout.write(part.text);
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break;
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}
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case 'tool-call': {
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process.stdout.write(
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`\n\nTool call: '${part.toolName}'\nInput: ${JSON.stringify(part.input, null, 2)}\n`,
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);
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break;
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}
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case 'tool-result': {
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process.stdout.write(
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`\nTool result: '${part.toolName}'\nOutput: ${JSON.stringify(part.output, null, 2)}\n`,
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);
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break;
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}
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case 'error': {
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console.error('\n\nCode execution error:', part.error);
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break;
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}
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}
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}
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process.stdout.write('\n\n');
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const fileIdList = (await result.staticToolResults).flatMap(t => {
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if (
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t.toolName === 'code_execution' &&
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t.output.type === 'bash_code_execution_result'
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) {
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return t.output.content.map(o => o.file_id);
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}
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return [];
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});
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await Promise.all(fileIdList.map(fileId => downloadFile(fileId)));
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});
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async function downloadFile(file: string) {
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try {
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const apiKey = process.env.ANTHROPIC_API_KEY;
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if (!apiKey) {
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throw new Error('ANTHROPIC_API_KEY is not set');
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}
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const infoUrl = `https://api.anthropic.com/v1/files/${file}`;
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const infoPromise = fetch(infoUrl, {
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method: 'GET',
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headers: {
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'x-api-key': apiKey,
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'anthropic-version': '2023-06-01',
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'anthropic-beta': 'files-api-2025-04-14',
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},
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});
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const downloadUrl = `https://api.anthropic.com/v1/files/${file}/content`;
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const downloadPromise = fetch(downloadUrl, {
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method: 'GET',
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headers: {
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'x-api-key': apiKey,
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'anthropic-version': '2023-06-01',
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'anthropic-beta': 'files-api-2025-04-14',
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},
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});
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const [infoResponse, downloadResponse] = await Promise.all([
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infoPromise,
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downloadPromise,
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]);
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if (!infoResponse.ok) {
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throw new Error(
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`HTTP Error: ${infoResponse.status} ${infoResponse.statusText}`,
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);
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}
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const {
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filename,
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}: {
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type: 'file';
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id: string;
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size_bytes: number;
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created_at: Date;
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filename: string;
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mime_type: string;
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downloadable?: boolean;
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} = await infoResponse.json();
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if (!downloadResponse.ok) {
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throw new Error(
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`HTTP Error: ${downloadResponse.status} ${downloadResponse.statusText}`,
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);
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}
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// get as binary data
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const arrayBuffer = await downloadResponse.arrayBuffer();
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const buffer = Buffer.from(arrayBuffer);
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const outputPath = `output/${filename}`;
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fs.writeFileSync(outputPath, buffer);
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console.log(`file saved: ${outputPath}`);
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console.log(`file size: ${buffer.length} bytes`);
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return {
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path: outputPath,
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size: buffer.length,
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};
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} catch (error) {
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console.error('error:', error);
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throw error;
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}
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}

‎examples/next-openai/app/api/code-execution-files/anthropic/[file]/route.ts‎

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import 'dotenv/config';
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const dynamic = 'force-dynamic';
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const execute = async (
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_req: Request,
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{
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params,
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}: {
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params: Promise<{
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file: string;
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}>;
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},
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) => {
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const { file } = await params;
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const apiKey = process.env.ANTHROPIC_API_KEY;
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if (!apiKey) {
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throw new Error('ANTHROPIC_API_KEY is not set');
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}
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const infoUrl = `https://api.anthropic.com/v1/files/${file}`;
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const infoPromise = fetch(infoUrl, {
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method: 'GET',
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headers: {
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'x-api-key': apiKey,
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'anthropic-version': '2023-06-01',
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'anthropic-beta': 'files-api-2025-04-14',
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},
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});
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const downloadUrl = `https://api.anthropic.com/v1/files/${file}/content`;
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const downloadPromise = fetch(downloadUrl, {
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method: 'GET',
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headers: {
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'x-api-key': apiKey,
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'anthropic-version': '2023-06-01',
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'anthropic-beta': 'files-api-2025-04-14',
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},
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});
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const [infoResponse, downloadResponse] = await Promise.all([
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infoPromise,
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downloadPromise,
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]);
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if (!infoResponse.ok) {
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throw new Error(
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`HTTP Error: ${infoResponse.status} ${infoResponse.statusText}`,
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);
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}
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if (!downloadResponse.ok) {
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throw new Error(
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`HTTP Error: ${downloadResponse.status} ${downloadResponse.statusText}`,
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);
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}
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// https://github.com/anthropics/anthropic-sdk-typescript/blob/main/src/resources/beta/files.ts
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const {
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filename,
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size_bytes,
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}: {
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type: 'file';
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id: string;
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size_bytes: number;
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created_at: Date;
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filename: string;
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mime_type: string;
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downloadable?: boolean;
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} = await infoResponse.json();
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// get as binary data
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const arrayBuffer = await downloadResponse.arrayBuffer();
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const buffer = Buffer.from(arrayBuffer);
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return new Response(buffer, {
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status: 200,
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headers: {
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'Content-Disposition': `attachment; filename*=UTF-8''${encodeURIComponent(filename)}`,
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'Content-Type': 'application/octet-stream',
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'Content-Length': size_bytes.toString(),
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'X-File-Name': encodeURIComponent(filename),
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},
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});
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};
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export { dynamic, execute as GET, execute as POST };

‎examples/next-openai/components/tool/anthropic-code-execution-view.tsx‎

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import { anthropic } from '@ai-sdk/anthropic';
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import { UIToolInvocation } from 'ai';
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import { Download } from 'lucide-react';
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export default function AnthropicCodeExecutionView({
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invocation,
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<br />
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</>
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)}
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<br />
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{invocation.output.content.length > 0 && (
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<div className="bg-gray-200 py-2 px-2 rounded-lg flex flex-col gap-1">
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<div className="px-1">
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{invocation.output.content.length > 1 ? (
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<p className="text-black">downloads</p>
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) : (
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<p className="text-black">download</p>
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)}
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</div>
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{invocation.output.content.map(file => (
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<button
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className="bg-cyan-800 hover:bg-cyan-700 text-white rounded-lg py-1 px-2 border border-white cursor-pointer"
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key={file.file_id}
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onClick={() =>
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window.open(
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`/api/code-execution-files/anthropic/${file.file_id}`,
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'_blank',
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)
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}
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>
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<div className="flex gap-1 items-center justify-center">
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<Download />
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<p>{file.file_id}</p>
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</div>
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</button>
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))}
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</div>
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)}
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{invocation.output.return_code != null && (
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<>
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<span className="font-semibold">Return Code:</span>

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