GLM Z1 Rumination 32B

Zhipu Ai chatreasoning Free

API ID: thudm/glm-z1-rumination-32b-0414

Input Price
Free
/1M tokens
Output Price
Free
/1M tokens

About GLM Z1 Rumination 32B

THUDM: GLM Z1 Rumination 32B is a 32B-parameter deep reasoning model from the GLM-4-Z1 series, optimized for complex, open-ended tasks requiring prolonged deliberation. It builds upon glm-4-32b-0414 with additional reinforcement learning phases and multi-stage alignment strategies, introducing “rumination” capabilities designed to emulate extended cognitive processing. This includes iterative reasoning, multi-hop analysis, and tool-augmented workflows such as search, retrieval, and citation-aware synthesis. The model excels in research-style writing, comparative analysis, and intricate question answering. It supports function calling for search and navigation primitives (`search`, `click`, `open`, `finish`), enabling use in agent-style pipelines. Rumination behavior is governed by multi-turn loops with rule-based reward shaping and delayed decision mechanisms, benchmarked against Deep Research frameworks such as OpenAI’s internal alignment stacks. This variant is suitable for scenarios requiring depth over speed.

🏆
Price Ranking
#6 lowest price among 1240 Chat models — Top 20% cheapest!

Model Specifications

Context Length
32k
Max Output
—
Release Date
2025-04-25
Capabilities
chat reasoning
Input Modalities
text
Output Modalities
text

Best For

  • Complex reasoning, math problems, multi-step logic
  • Conversations, content writing, general assistance

Consider Alternatives For

  • Image understanding (needs vision capability)
  • Simple Q&A (cheaper models available)
🎉

This model is completely free!

No token costs - use it without worrying about API bills.

Estimate Token Usage

Zhipu Ai Model Lineup

Compare all models from Zhipu Ai to find the best fit

Model Input Output Context Capabilities
GLM Z1 Rumination 32B Current Free Free 32k chat reasoning
GLM 4 9B Free Free 32k chat
GLM 4 9B Free Free 32k chat
GLM 4 32B Free Free 33k chat
GLM 4 32B Free Free 33k chat
GLM 4.1V 9B Thinking Free Free 66k chat vision reasoning

Similar Models from Other Providers

Cross-brand alternatives with similar capabilities

Google Gemma 3n 4B
Input: Free
Output: Free
Context: 33k
Alibaba Qwen Qwen2.5-VL 7B Instruct
Input: Free
Output: Free
Context: 33k
ByteDance Seedream 4.5
Input: Free
Output: Free
Context: 4k
Black Forest Labs FLUX.2 Max
Input: Free
Output: Free
Context: 47k

🚀 Quick Start

Get started with GLM Z1 Rumination 32B API

OpenAI-compatible SDK
from openai import OpenAI

client = OpenAI(
    base_url="https://api.provider.com/v1",
    api_key="YOUR_API_KEY"
)

response = client.chat.completions.create(
    model="thudm/glm-z1-rumination-32b-0414",
    messages=[
        {"role": "user", "content": "Hello!"}
    ]
)
print(response.choices[0].message.content)