GPT-4o 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-4o",
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)
GPT-4o 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-4o",
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)
Multi-Image Comparison
response = client.chat.completions.create(
model="gpt-4o",
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)
Claude Vision
Claude models also support vision through the OpenAI-compatible format:
response = client.chat.completions.create(
model="claude-sonnet-4-20250514",
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
| Model | Description |
|---|
gpt-4o | OpenAI flagship multimodal model |
gpt-4o-mini | Lightweight version, faster |
claude-sonnet-4-20250514 | Anthropic Claude Sonnet |
claude-opus-4-20250514 | Anthropic Claude Opus |
gemini-2.5-pro | Google Gemini Pro |
gemini-2.5-flash | Google Gemini Flash |
Image size should not exceed 20MB. Base64 encoding adds approximately 33% to the data size, so URL method is recommended for large images.
