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gpt-5.4 Vision - URL Method

from openai import OpenAI

client = OpenAI(api_key="sk-xxx", base_url="https://crazyrouter.com/v1")

response = client.chat.completions.create(
    model="gpt-5.4",
    messages=[{
        "role": "user",
        "content": [
            {"type": "text", "text": "Describe the content of this image"},
            {
                "type": "image_url",
                "image_url": {
                    "url": "https://example.com/photo.jpg"
                }
            }
        ]
    }]
)

print(response.choices[0].message.content)

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gpt-5.4 Vision - Local Image

import base64
from openai import OpenAI

client = OpenAI(api_key="sk-xxx", base_url="https://crazyrouter.com/v1")

# Read local image and convert to base64
with open("photo.jpg", "rb") as f:
    image_data = base64.b64encode(f.read()).decode("utf-8")

response = client.chat.completions.create(
    model="gpt-5.4",
    messages=[{
        "role": "user",
        "content": [
            {"type": "text", "text": "What's in this image?"},
            {
                "type": "image_url",
                "image_url": {
                    "url": f"data:image/jpeg;base64,{image_data}"
                }
            }
        ]
    }]
)

print(response.choices[0].message.content)

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Multi-Image Comparison

response = client.chat.completions.create(
    model="gpt-5.4",
    messages=[{
        "role": "user",
        "content": [
            {"type": "text", "text": "Compare the differences between these two images"},
            {"type": "image_url", "image_url": {"url": "https://example.com/img1.jpg"}},
            {"type": "image_url", "image_url": {"url": "https://example.com/img2.jpg"}}
        ]
    }]
)

print(response.choices[0].message.content)

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Claude Vision

Claude models also support vision through the OpenAI-compatible format: 
response = client.chat.completions.create(
    model="claude-sonnet-4-6",
    messages=[{
        "role": "user",
        "content": [
            {"type": "text", "text": "Describe this image in detail"},
            {
                "type": "image_url",
                "image_url": {
                    "url": f"data:image/png;base64,{image_data}"
                }
            }
        ]
    }],
    max_tokens=1024
)

print(response.choices[0].message.content)

​
Supported Vision Models

ModelDescription
gpt-5.4OpenAI-compatible vision model verified successfully in production on March 23, 2026
claude-sonnet-4-6Claude OpenAI-compatible vision model verified successfully in production
Vision input with gpt-5.4 and claude-sonnet-4-6 was verified in Crazyrouter production on March 23, 2026. Image size should not exceed 20MB; base64 encoding adds approximately 33% to the payload size, so URL method is recommended for larger files.