OpenAI API Error: service_tier extra input forbidden when using Computer Use Agent

[pbanuru]

When using a Computer Use Agent with Stagehand (following the docs), the agent fails with a 400 error from the OpenAI API:

BadRequestError: 400 [{'type': 'extra_forbidden', 'loc': ('body', 'service_tier'), 'msg': 'Extra inputs are not permitted', 'input': 'auto'}]

To Reproduce

1. Start with the codebase from npx create-browser-app (integration guide).
2. Replace the main function body in index.ts with the following code:

   await stagehand.page.goto("https://www.google.com");
   
   const agent = stagehand.agent({
     provider: "openai",
     model: "computer-use-preview",
     instructions: `You are a helpful assistant that can use a web browser.
     Do not ask follow up questions, the user will trust your judgement.`,
     options: {
       apiKey: process.env.OPENAI_API_KEY,
     },
   });
   
   await agent.execute("Apply for a library card at the San Francisco Public Library");

3. Observe the error in the logs:

   Error getting action from OpenAI: BadRequestError: 400 [{'type': 'extra_forbidden', 'loc': ('body', 'service_tier'), 'msg': 'Extra inputs are not permitted', 'input': 'auto'}]
   

Expected behavior
The agent should execute the task without running into an error

Logs

[redacted]@[redacted] [redacted] % npm start

> start
> tsx index.ts

[2025-04-16 14:06:45.845 -0700] INFO: launching local browser
    category: "init"
    headless: false
[2025-04-16 14:06:45.845 -0700] INFO: local browser launch options
    category: "init"
    localLaunchOptions: "{\"viewport\":{\"width\":1920,\"height\":1080}}"
[2025-04-16 14:06:56.808 -0700] INFO: local browser started successfully.
    category: "init"
[2025-04-16 14:06:57.639 -0700] INFO: Creating agent instance
    category: "agent"
[2025-04-16 14:06:57.639 -0700] INFO: Executing agent task: Apply for a library card at the San Francisco Public Library
    category: "agent"
[2025-04-16 14:06:57.655 -0700] INFO: Cursor injected for visual feedback
    category: "agent"
[2025-04-16 14:06:57.655 -0700] INFO: Taking screenshot and sending to agent
    category: "agent"
[2025-04-16 14:06:57.728 -0700] INFO: Executing agent task: Apply for a library card at the San Francisco Public Library
    category: "agent"
Error getting action from OpenAI: BadRequestError: 400 [{'type': 'extra_forbidden', 'loc': ('body', 'service_tier'), 'msg': 'Extra inputs are not permitted', 'input': 'auto'}]
    at Function.generate ([redacted]/node_modules/openai/src/error.ts:72:14)
    at OpenAI.makeStatusError ([redacted]/node_modules/openai/src/core.ts:462:21)
    at OpenAI.makeRequest ([redacted]/node_modules/openai/src/core.ts:526:24)
    at process.processTicksAndRejections (node:internal/process/task_queues:105:5) {
  status: 400,
  headers: {
    'alt-svc': 'h3=":443"; ma=86400',
    'cf-cache-status': 'DYNAMIC',
    'cf-ray': '[redacted]',
    connection: 'keep-alive',
    'content-length': '232',
    'content-type': 'application/json',
    date: 'Wed, 16 Apr 2025 21:06:58 GMT',
    'openai-organization': '[redacted]',
    'openai-processing-ms': '441',
    'openai-version': '2020-10-01',
    server: 'cloudflare',
    'set-cookie': '[redacted]',
    'strict-transport-security': 'max-age=31536000; includeSubDomains; preload',
    'x-content-type-options': 'nosniff',
    'x-request-id': '[redacted]'
  },
  request_id: '[redacted]',
  error: {
    message: "[{'type': 'extra_forbidden', 'loc': ('body', 'service_tier'), 'msg': 'Extra inputs are not permitted', 'input': 'auto'}]",
    type: 'invalid_request_error',
    param: null,
    code: null
  },
  code: null,
  param: null,
  type: 'invalid_request_error'
}
[2025-04-16 14:06:58.425 -0700] ERROR: Error executing step: 400 [{'type': 'extra_forbidden', 'loc': ('body', 'service_tier'), 'msg': 'Extra inputs are not permitted', 'input': 'auto'}]
    category: "agent"
[2025-04-16 14:06:58.425 -0700] ERROR: Error executing agent task: 400 [{'type': 'extra_forbidden', 'loc': ('body', 'service_tier'), 'msg': 'Extra inputs are not permitted', 'input': 'auto'}]
    category: "agent"

🤘 Thanks so much for using Stagehand! Reach out to us on Slack if you have any feedback: https://stagehand.dev/slack

[redacted]@[redacted] [redacted] % 
...

Environment:

• Stagehand version: 2.1.0
• OpenAI SDK version: 4.95.0
• Node version: v22.14.0
• OS: macOS 15.1.1

[mclemmens]

I had this same issue yesterday for an hour or so and then it went away. Maybe it was an odd glitch in the OpenAI system?

[anthony-ferraro]

I also had this error yesterday for around an hour. It could be something on OpenAI's end. I was not using stagehand.