Perplexity API Internal Server Error (500) on sonar-deep-research with Large File Upload (~518k Tokens), Works Fine on sonar-pro

[mkrzywda]

When I use sonar-pro:

import os
import base64
from perplexity import Perplexity

client = Perplexity(api_key=os.getenv("PERPLEXITY_API_KEY"))
file_path = "data.csv"

# Read and encode file as base64
with open(file_path, "rb") as f:
    file_bytes = f.read()
file_b64 = base64.b64encode(file_bytes).decode("utf-8")

response = client.chat.completions.create(
    model="sonar-pro",
    messages=[
        {
            "role": "user",
            "content": [
                {"type": "text", "text": "Analyze this document and extract key insights."},
                {
                    "type": "file_url",
                    "file_url": {"url": file_b64},
                    "file_name": os.path.basename(file_path),  # Optional but recommended
                },
            ],
        }
    ],
)

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

all works correctly, but when I change to sonar-deep-research I recieve:

perplexity.InternalServerError: Error code: 500 - {'error': {'message': 'An internal server error has occurred.', 'type': 'internal_server_error', 'code': 500}}

my file size using tiktoken:

File size      : 1,386,973 characters
Token count    : 517,913 tokens
               ≈ 517.9k tokens

Why it's happen?