Z.ai just released GLM-5 Turbo, marking a notable shift for the Chinese AI company that built its reputation on open-source models. Unlike their previous GLM releases that anyone could download and modify, this one stays locked behind their API.
The new model targets business automation — think software that can use multiple tools in sequence, handle long workflows, and run tasks without constant human oversight. Z.ai says it's faster and cheaper than their open-source GLM-5, though they haven't shared specific performance numbers yet.
You can access GLM-5 Turbo through OpenRouter, a service that lets businesses try different AI models without committing to one provider. The company positions this as competing with OpenAI's models for "agentic" tasks — AI-speak for software that can act somewhat independently.
What this means for small businesses
This reflects a broader trend: AI companies are discovering that giving away their best work doesn't pay the bills. Even companies that started with open-source missions are keeping their most capable models proprietary.
For business owners, this creates both opportunity and risk. More competition among proprietary models should drive down prices and improve quality. But it also means less control — you're dependent on the company's pricing and availability decisions.
The bottom line
If you're evaluating AI tools for business processes, Z.ai's move adds another option to test through OpenRouter. But don't expect the AI industry's brief open-source moment to last. Companies need revenue to fund the massive computing costs these models require, and that means keeping their best work behind paywalls.