What is GLM 4.7 Flash?
GLM 4.7 Flash (model name: glm-4-flash) is Zhipu AI's speed-optimized language model designed for applications where response time is critical. It's part of the GLM-4 family but uses distillation and quantization techniques to deliver 3-5x faster inference while maintaining impressive quality.
🚀 Key Highlights
- ⚡ Ultra-Fast Inference: Average response time under 1 second for typical queries
- 💰 Completely Free: No cost on official Zhipu AI platform (with rate limits)
- 🎯 High Quality: 85-90% of GLM-4-Plus quality at 5x the speed
- 📏 128K Context: Same long-context capability as other GLM-4 models
- 🌐 Multilingual: Strong Chinese and English support
The GLM 4.7 Flash API is ideal for chatbots, real-time assistants, customer service automation, and any application where users expect instant responses. It's the default choice for developers building interactive experiences.
GLM 4.7 Flash vs GLM 4.7 (Plus)
Understanding the trade-offs between speed and quality helps you choose the right model:
| Feature | GLM-4-Flash | GLM-4-Air | GLM-4-Plus |
|---|---|---|---|
| Inference Speed | ⚡⚡⚡ Fastest | ⚡⚡ Fast | ⚡ Moderate |
| Average Response Time | ~0.8s | ~1.5s | ~2.5s |
| Quality Score | 85/100 | 92/100 | 98/100 |
| Pricing (Official) | FREE | ¥0.001/1K tokens | ¥0.05/1K tokens |
| Our Proxy Price | Even cheaper for high volume | ¥0.0004/1K tokens | ¥0.02/1K tokens |
| Context Window | 128K tokens | 128K tokens | 128K tokens |
| Best Use Case | Chatbots, real-time apps | General production apps | Complex reasoning, coding |
🚀 Choose GLM-4-Flash If:
- ✓ Speed is your top priority
- ✓ Building real-time chat interfaces
- ✓ Need instant customer support responses
- ✓ Running on a tight budget (it's free!)
- ✓ Handling simple Q&A or content generation
- ✓ Prototyping and testing
⚖️ Choose GLM-4-Air If:
- ✓ Need balance of speed and quality
- ✓ General-purpose production apps
- ✓ Content generation at scale
- ✓ Want better quality than Flash
- ✓ Budget-conscious but need reliability
🎯 Choose GLM-4-Plus If:
- ✓ Maximum quality is essential
- ✓ Complex reasoning tasks
- ✓ Professional code generation
- ✓ Advanced analysis and research
- ✓ Can afford premium pricing
💡 Pro Tip: Hybrid Approach
Many developers use GLM-4-Flash for initial responses (fast user feedback) and then optionally upgrade to GLM-4-Plus for follow-up clarifications or complex tasks. This balances user experience with cost efficiency.
GLM 4.7 Flash API Pricing
One of the biggest advantages of GLM-4-Flash is its pricing model:
Official Zhipu AI
FREEGLM-4-Flash is completely free on the official platform with reasonable rate limits.
- ✓ Free tier: 60 RPM, 1M tokens/day
- ✓ No credit card required
- ✓ Perfect for learning and prototyping
- ⚠️ Subject to rate limiting during peak hours
- ⚠️ No SLA guarantees
Our Proxy Service
BEST VALUEFor high-volume production apps, our proxy offers better reliability and even lower effective costs.
- ✓ Volume discounts for enterprise usage
- ✓ 99.9% uptime SLA guarantee
- ✓ No rate limiting or throttling
- ✓ Priority support 24/7
- ✓ Access to all GLM models at 40% off
When to Use Our Proxy vs Free Tier
| Scenario | Free Tier | Our Proxy |
|---|---|---|
| Learning / Experimenting | ✓ Perfect | Overkill |
| Low-traffic personal project (<100 requests/day) | ✓ Great | Not needed |
| Production app (1K-10K requests/day) | ⚠️ May hit limits | ✓ Recommended |
| Enterprise app (>10K requests/day) | ✗ Will hit limits | ✓ Required |
| Need SLA guarantees | ✗ No SLA | ✓ 99.9% uptime |
| Need priority support | ✗ Community only | ✓ 24/7 support |
Use Cases for GLM Flash API
GLM-4-Flash excels in scenarios where speed matters more than absolute perfection:
Conversational Chatbots
Real-time chat applications where users expect instant responses. GLM-4-Flash's sub-second latency creates a natural conversation flow.
Example: Customer support chat, AI companions, virtual assistants
Interactive Gaming
NPCs (non-player characters) that respond dynamically to player actions. Fast inference ensures smooth gameplay.
Example: AI dungeon masters, game dialogue systems, procedural storytelling
Mobile Applications
Mobile apps with limited bandwidth benefit from GLM-4-Flash's efficiency. Faster responses = better user experience on slower networks.
Example: Mobile chatbots, smart keyboard suggestions, voice assistants
Real-Time Content Moderation
Automatically filter user-generated content for compliance. Speed is essential to avoid user friction.
Example: Comment filtering, spam detection, content categorization
Batch Processing
Process thousands of items quickly. GLM-4-Flash can handle 5x more throughput than GLM-4-Plus in the same timeframe.
Example: Email classification, sentiment analysis, data enrichment
Search Result Enhancement
Generate quick summaries or Q&A snippets for search results without slowing down the search experience.
Example: Search snippet generation, FAQ auto-responses, query understanding
How to Use GLM 4.7 Flash API
Using the GLM-4-Flash API is identical to other GLM models - just specify the model name:
Python Example (Official API)
import requests
API_URL = "https://open.bigmodel.cn/api/paas/v4/chat/completions"
API_KEY = "your-api-key"
def chat_with_flash(user_message):
headers = {
"Authorization": f"Bearer {API_KEY}",
"Content-Type": "application/json"
}
data = {
"model": "glm-4-flash", # The key difference!
"messages": [
{"role": "user", "content": user_message}
],
"temperature": 0.7,
"max_tokens": 1000
}
response = requests.post(API_URL, headers=headers, json=data)
return response.json()['choices'][0]['message']['content']
# Example usage
answer = chat_with_flash("What is machine learning?")
print(answer)
# Response time: ~0.8 seconds 🚀JavaScript/Node.js Example
const axios = require('axios');
const API_URL = "https://open.bigmodel.cn/api/paas/v4/chat/completions";
const API_KEY = process.env.GLM_API_KEY;
async function chatWithFlash(userMessage) {
const response = await axios.post(API_URL, {
model: "glm-4-flash",
messages: [
{ role: "user", content: userMessage }
],
temperature: 0.7,
max_tokens: 1000
}, {
headers: {
"Authorization": `Bearer ${API_KEY}`,
"Content-Type": "application/json"
}
});
return response.data.choices[0].message.content;
}
// Example usage
chatWithFlash("Tell me a fun fact about AI")
.then(answer => console.log(answer))
.catch(err => console.error(err));Streaming Responses (Recommended for Chat UIs)
import requests
def chat_with_flash_streaming(user_message):
headers = {
"Authorization": f"Bearer {API_KEY}",
"Content-Type": "application/json"
}
data = {
"model": "glm-4-flash",
"messages": [{"role": "user", "content": user_message}],
"stream": True # Enable streaming for real-time responses
}
response = requests.post(API_URL, headers=headers, json=data, stream=True)
# Print tokens as they arrive
for line in response.iter_lines():
if line:
chunk = line.decode('utf-8')
if chunk.startswith('data: '):
print(chunk[6:], end='', flush=True)
# Even faster perceived response time with streaming!
chat_with_flash_streaming("Write a short poem about spring")💡 Best Practice: Use Streaming
When building chat interfaces, always enable stream: true. Users see the first tokens in ~200ms, making the experience feel even faster than the already-quick GLM-4-Flash.
Related Resources
GLM 4.7 API Complete Guide →
Learn about all GLM-4.7 models including Plus and Air variants
GLM Free API Access →
How to get free access to GLM-4-Flash and other free models
GLM API Key Setup →
Step-by-step guide to obtaining your GLM API key
API Documentation →
Complete technical documentation for GLM-4 API