OpenAI
GPT-5.3 Chat Latest
OpenAI's 2026 latest chat model, exceptional in reasoning, code, creative writing, with caching support
Context Length256K tokens
Model TypeLarge Language Model (LLM)
MultimodalSupports text, image, audio input
Pricing & Specs
💰 Pricing
Input$1.75 / M tokens
Output$14 / M tokens
Cache Hit$0.175 / M tokens
⚙️ Specs
Context Length256K tokens
Model TypeLarge Language Model (LLM)
MultimodalSupports text, image, audio input
Caching SupportSupports Prompt Caching Acceleration
Knowledge CutoffDecember 2025
API Examples
Python
from openai import OpenAI
client = OpenAI(
base_url="https://api.xairouter.com/v1",
api_key="your-api-key"
)
response = client.chat.completions.create(
model="gpt-5.3-chat",
messages=[
{"role": "user", "content": "Hello!"}
]
)
print(response.choices[0].message.content)cURL
curl https://api.xairouter.com/v1/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_API_KEY" \
-d '{
"model": "gpt-5.3-chat",
"messages": [
{"role": "user", "content": "Hello!"}
]
}'