GLM-5.2

​

Key capabilities

• OpenAI-compatible — Works as a drop-in replacement with the OpenAI SDK
• 1M context window — Solid, lossless 1M-token context that stays stable on long-horizon tasks, not just nominal length
• 128K max output — Generates up to 128K tokens in a single response
• Thinking mode — Chain-of-thought reasoning (forced thinking when enabled on GLM-5.2)
• Adjustable reasoning effort — reasoning_effort tunes how hard the model thinks
• Open-source SOTA coding — Top-ranked open model on long-horizon coding benchmarks, comparable to the strongest closed models
• Function calling, structured output & MCP — Robust tool use, JSON output, and MCP tool/data-source integration
• Streaming — Real-time token streaming via SSE

​

Output specifications

​

Quick example

curl https://www.anyfast.ai/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "glm-5.2",
    "messages": [
      { "role": "user", "content": "Explain quantum entanglement in simple terms." }
    ]
  }'

​

Thinking mode

response = client.chat.completions.create(
    model="glm-5.2",
    messages=[
        {"role": "user", "content": "Design a REST API for a blogging platform."}
    ],
    extra_body={
        "thinking": {"type": "enabled"},
        "reasoning_effort": "max"
    }
)

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

​

Parameters