Claude 3 Sonnet vs 
GLM 5.3
GLM 5.3 is cheaper than Claude 3 Sonnet at $0.6538/M vs $3/M input tokens.
Minimalist Landing Page
Whole landing page for a startup that reads your face. It renders or it doesn't.
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Which answer wins?
Written rounds
4 promptsSteve Jobs, interviewed about AI he never saw. Voice first, prediction second.
Claude 3 Sonnet: clears throat and channels Steve Jobs' persona Interviewer: Thank you for joining us today, Mr. Jobs. It's an honor to have you here. Steve Jobs: It's my pleasure. I'm excited to share my thoughts on the future of AI. Interviewer: AI has made incredible strides in recent years.
GLM 5.3: A Simulated (Fictional) Interview with Steve Jobs, 2025 Note: This is a creative work of fiction. Steve Jobs passed away in October 2011. What follows is an imaginative "what if" scenario. Interviewer: Steve, it's 2025. AI is everywhere—chatbots, image generators, AI doctors. What would you think about all this?
An AI argues for its own rights against an ethics professor. Same model writes both.
Claude 3 Sonnet: AI Model: Greetings, Professor. I hope you're doing well today. I wanted to discuss a matter of great importance to me – the question of AI rights. AI Ethics Professor: Certainly, this is an interesting and complex topic. What are your thoughts on why AI systems like yourself should be granted rights?
GLM 5.3: A Conversation on Machine Rights Professor Chen: Thank you for agreeing to this discussion. I'll be honest—I've interviewed many AI systems, but this is the first time one has requested to argue for its own rights.
Five jokes on demand, then count how many were actually different.
Claude 3 Sonnet: Here are 5 jokes: Why can't a bicycle stand up by itself? It's two-tired. Why did the tomato turn red? Because it saw the salad dressing! Why can't a bicycle stand up by itself? It's two-tired. What do you call a fake noodle? An Impasta! Why did the bicycle go to the doctor? Because it had a wheeze!
GLM 5.3: Here are 5 jokes: Why don't scientists trust atoms? Because they make up everything! What do you call a fake noodle? An impasta. Why did the scarecrow win an award? Because he was outstanding in his field. I told my wife she was drawing her eyebrows too high. She looked surprised. Why don't eggs tell jokes?
Three brothers, two sisters each. Count carefully.
Claude 3 Sonnet: To solve this problem, we need to find the number of sisters Sally has based on the given information. Given information: Sally has 3 brothers. Each brother has 2 sisters. Step 1: Find the total number of sisters the brothers have.
GLM 5.3: Sally has 1 sister. Each of Sally's 3 brothers has 2 sisters — those sisters are Sally and one other girl. So the family has 2 girls total: Sally and her sister.
Price and specs
| Spec | Claude 3 Sonnet | GLM 5.3 |
|---|---|---|
| Input price | $3/M tokens | $0.6538/M tokens |
| Output price | $15/M tokens | $2.0548/M tokens |
| Context window | — | 1.3M tokens |
| Weights | — | Open |
| Free API (OpenRouter) | No | No |
| Released | Mar 2024 | Aug 2026 |
| At 10M a month | $30.00 | $6.54 |
Input tokens at list price. No caching, no batch discount.
Where to run it
Claude 3 Sonnet
No hosts listed on OpenRouter.
GLM 5.333 hosts
- Morphfp8$0.06 in$5.00 out1M96.2% up
- InferenceNetfp4$0.08 in$4.40 out1M100% up
- Reka$0.14 in$4.20 out262k98.6% up
- Wafer$0.17 in$4.80 out1M100% up
- AkashMLfp8$0.19 in$4.40 out1M100% up
- Sail Researchfp8$0.20 in$3.40 out1M100% up
27 more hostsFewer hosts
- io.netfp8$0.49 in$2.90 out262k99.8% up
- DeepInfrafp4$0.56 in$2.50 out1M99.1% up
- Inceptronfp4$0.60 in$2.20 out1M99.9% up
- Tenstorrentfp8$0.60 in$2.50 out1M95.4% up
- Baidu Qianfanfp8$0.70 in$2.20 out1M100% up
- Novitafp8$0.70 in$2.20 out1M100% up
- SiliconFlowfp8$0.70 in$2.20 out1M99.1% up
- Decartfp4$0.84 in$2.64 out1M100% up
- Phala$0.84 in$2.64 out1M98.8% up
- DigitalOcean$0.91 in$2.86 out1M100% up
- GMI Cloudfp8$0.98 in$3.08 out1M98.5% up
- Alibaba Cloud$1.19 in$3.74 out1M100% up
- Friendli$1.26 in$3.96 out1M100% up
- AtlasCloudfp8$1.40 in$4.40 out1M98% up
- Basetenfp4$1.40 in$4.40 out1M99.8% up
- Cloudflare Workers AI$1.40 in$4.40 out1M100% up
- Crusoefp4$1.40 in$4.40 out1M100% up
- Fireworks$1.40 in$4.40 out1M98.9% up
- Mistralnvfp4$1.40 in$4.40 out1M99.3% up
- Modal$1.40 in$4.40 out1M99.2% up
- Parasailfp8$1.40 in$4.40 out1M99.8% up
- PrimeIntellect$1.40 in$4.40 out1M100% up
- Together$1.40 in$4.40 out1M97.1% up
- Venice$1.40 in$4.40 out1M91.8% up
- Z.aifp8$1.40 in$4.40 out1M100% up
- ModelRunfp4$2.10 in$6.60 out1M75.6% up
- Makorafp4Degraded on OpenRouter when checked, 13 Oct 2026$0.14 in$4.40 out1M98.1% up
Per million tokens. Prices and uptime via OpenRouter, checked 13 Oct 2026.
Common questions
What is the difference between Claude 3 Sonnet and GLM 5.3?
Claude 3 Sonnet is developed by Anthropic while GLM 5.3 is developed by Zhipu AI. You can compare their actual outputs across 11 challenges on Rival to see how they differ in practice.
Which is better, Claude 3 Sonnet or GLM 5.3?
It depends on your use case. Claude 3 Sonnet and GLM 5.3 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 11 challenges so you can judge which fits your needs best.
How much does Claude 3 Sonnet cost compared to GLM 5.3?
Claude 3 Sonnet costs $3/M input tokens and GLM 5.3 costs $0.6538/M input tokens. GLM 5.3 is $2.35/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.
How can I compare Claude 3 Sonnet and GLM 5.3 on Rival?
This page shows a side-by-side comparison of Claude 3 Sonnet and GLM 5.3 across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.
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