Guide: Migration Guide

This guide lists breaking changes when migrating from the original ComputerAgent (v0.3.x) to the rewritten ComputerAgent (v0.4.x) and shows old vs new usage for all four agent loops.

Breaking Changes

Initialization:
- ComputerAgent (v0.4.x) uses model as a string (e.g. "anthropic/claude-sonnet-4-5-20250929") instead of LLM and AgentLoop objects.
- tools is a list (can include multiple computers and decorated functions).
- callbacks are now first-class for extensibility (image retention, budget, trajectory, logging, etc).
No explicit loop parameter:
- Loop is inferred from the model string (e.g. anthropic/, openai/, omniparser+, ui-tars).
No explicit computer parameter:
- Computers are added to tools list.

Usage Examples: Old vs New

1. Anthropic Loop

Old:

async with Computer() as computer:
    agent = ComputerAgent(
        computer=computer,
        loop=AgentLoop.ANTHROPIC,
        model=LLM(provider=LLMProvider.ANTHROPIC)
    )
    async for result in agent.run("Take a screenshot"):
        print(result)

New:

async with Computer() as computer:
    agent = ComputerAgent(
        model="anthropic/claude-sonnet-4-5-20250929",
        tools=[computer]
    )
    messages = [{"role": "user", "content": "Take a screenshot"}]
    async for result in agent.run(messages):
        for item in result["output"]:
            if item["type"] == "message":
                print(item["content"][0]["text"])

2. OpenAI Loop

Old:

async with Computer() as computer:
    agent = ComputerAgent(
        computer=computer,
        loop=AgentLoop.OPENAI,
        model=LLM(provider=LLMProvider.OPENAI)
    )
    async for result in agent.run("Take a screenshot"):
        print(result)

New:

async with Computer() as computer:
    agent = ComputerAgent(
        model="openai/computer-use-preview",
        tools=[computer]
    )
    messages = [{"role": "user", "content": "Take a screenshot"}]
    async for result in agent.run(messages):
        for item in result["output"]:
            if item["type"] == "message":
                print(item["content"][0]["text"])

3. UI-TARS Loop

Old:

async with Computer() as computer:
    agent = ComputerAgent(
        computer=computer,
        loop=AgentLoop.UITARS,
        model=LLM(provider=LLMProvider.OAICOMPAT, name="ByteDance-Seed/UI-TARS-1.5-7B", provider_base_url="https://.../v1")
    )
    async for result in agent.run("Take a screenshot"):
        print(result)

New:

async with Computer() as computer:
    agent = ComputerAgent(
        model="huggingface-local/ByteDance-Seed/UI-TARS-1.5-7B",
        tools=[computer]
    )
    messages = [{"role": "user", "content": "Take a screenshot"}]
    async for result in agent.run(messages):
        for item in result["output"]:
            if item["type"] == "message":
                print(item["content"][0]["text"])

4. Omni Loop

Old:

async with Computer() as computer:
    agent = ComputerAgent(
        computer=computer,
        loop=AgentLoop.OMNI,
        model=LLM(provider=LLMProvider.OLLAMA, name="gemma3")
    )
    async for result in agent.run("Take a screenshot"):
        print(result)

New:

async with Computer() as computer:
    agent = ComputerAgent(
        model="omniparser+ollama_chat/gemma3",
        tools=[computer]
    )
    messages = [{"role": "user", "content": "Take a screenshot"}]
    async for result in agent.run(messages):
        for item in result["output"]:
            if item["type"] == "message":
                print(item["content"][0]["text"])

Was this page helpful?

Migration Guide

Breaking Changes

Usage Examples: Old vs New

1. Anthropic Loop

2. OpenAI Loop

3. UI-TARS Loop

4. Omni Loop

On this page