Story perspectives
Zhipu AI Open-Sources GLM-5.1, Raises API Prices Again
4/8/2026
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Story summary
- Zhipu AI, a Chinese AI company, open-sourced its flagship model GLM-5.1 on April 8, 2026.
- Zhipu AI raised API prices by 10% across multiple billing categories.
- This marks the second price hike of 2026 after a 30% February increase for coding subscriptions.
- Artificial Analysis ranked GLM-5.1 as the strongest open model globally.
- GLM-5.1 is now priced closer to US models, though a significant gap remains.
