crimson-falcon-4

crimson-falcon-4 is Liutong’s flagship chat model. It excels at general-purpose text generation, conversation, code writing, summarization, and instruction following.

Capabilities

• Natural language conversation and Q&A
• Code generation and debugging across dozens of languages
• Long-form content writing and summarization
• Structured data extraction (JSON, CSV, etc.)
• Multi-turn conversation with context retention
• Function calling and tool use

API usage

Chat completion

from openai import OpenAI

client = OpenAI(
    base_url="https://api.liutong.llby.org/v1",
    api_key="lt_your_api_key",
)

response = client.chat.completions.create(
    model="crimson-falcon-4",
    messages=[
        {"role": "system", "content": "You are a helpful coding assistant."},
        {"role": "user", "content": "Write a Python function to check if a number is prime."},
    ],
    temperature=0.7,
    max_tokens=1024,
)

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

Streaming

stream = client.chat.completions.create(
    model="crimson-falcon-4",
    messages=[{"role": "user", "content": "Explain quantum computing simply."}],
    stream=True,
)

for chunk in stream:
    if chunk.choices[0].delta.content:
        print(chunk.choices[0].delta.content, end="")

Parameters

Endpoint

POST /v1/chat/completions

See the full Chat Completions API reference.