Grok API (xAI) vs Z.ai (GLM): Which is Better in 2026?
Choosing between Grok API (xAI) and Z.ai (GLM)? Both are popular llm provider tools. Below we compare them on pricing, free tiers, features, and pros & cons so you can pick the right fit for your stack.
Quick verdict
Grok API (xAI) is the safer pick if budget matters — it has a free tier, while Z.ai (GLM) does not. Choose Z.ai (GLM) when its specific features justify the cost. In our catalog, Z.ai (GLM) rates slightly higher (4.5 vs 4.2 out of 5).
Grok API (xAI) vs Z.ai (GLM) — Side by Side
| Grok API (xAI) | Z.ai (GLM) | |
|---|---|---|
| Category | LLM Provider | LLM Provider |
| Pricing | Free | Usage-based |
| Starting price | Free tier available | Pay-as-you-go |
| Free tier | — | |
| Rating | 4.2 | 4.5 |
| Best for | LLM Provider — llm, ai | LLM Provider — ai, api |
Pros & Cons
- Real-time web search built in
- OpenAI-compatible — easy migration
- Competitive pricing vs GPT-4
- Free tier available for prototyping
- Smaller ecosystem than OpenAI
- Newer — fewer community resources
- Rate limits on free tier
- Frontier coding quality
- Very competitive pricing
- Strong agentic/coding use
- Coding plan options
- Data governance considerations
- Newer to Western developers
Key Features Compared
Grok API (xAI)
- Grok-2 model access
- 25 requests/hour (rate-limited)
- 131K token context window
- Real-time web search integration
- OpenAI-compatible API
- Good for prototyping
Z.ai (GLM)
- GLM-5.1 frontier model
- Top-tier coding performance
- OpenAI-compatible API
- Coding subscription plans available
Choose Grok API (xAI) if…
- You want to start free — Grok API (xAI) has a free tier and Z.ai (GLM) does not.
- Real-time web search built in
- OpenAI-compatible — easy migration
- Competitive pricing vs GPT-4
Choose Z.ai (GLM) if…
- Frontier coding quality
- Very competitive pricing
- Strong agentic/coding use
Frequently Asked Questions
Is Grok API (xAI) better than Z.ai (GLM)?⌄
Grok API (xAI) is the safer pick if budget matters — it has a free tier, while Z.ai (GLM) does not. Choose Z.ai (GLM) when its specific features justify the cost. In our catalog, Z.ai (GLM) rates slightly higher (4.5 vs 4.2 out of 5).
What is the difference between Grok API (xAI) and Z.ai (GLM)?⌄
Grok API (xAI) — xAI's Grok API — real-time internet access, large context window, and competitive pricing for AI-powered apps. Z.ai (GLM) — Zhipu's GLM models via Z.ai — frontier-class coding performance that has beaten Claude Opus on key benchmarks. Both are llm provider tools; the comparison table above breaks down pricing, free tiers, and what each is best for.
Grok API (xAI) vs Z.ai (GLM): which is cheaper?⌄
Grok API (xAI) pricing: Free. Z.ai (GLM) pricing: Usage-based. Confirm current pricing on each tool's official site, as plans change.
Which is rated higher, Grok API (xAI) or Z.ai (GLM)?⌄
In our catalog, Grok API (xAI) rates 4.2 out of 5 and Z.ai (GLM) rates 4.5 out of 5, so Z.ai (GLM) has a slight edge on reviews.
See more options in our guide to the best llm provider tools for startups.
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