Google Stax
Experimental developer tool from Google Labs for LLM evaluation with human labeling and LLM-as-judge autoraters.
| Category | Evals & Testing |
| Open source | No |
| Self-hostable | No |
| Pricing model | free |
| Pricing notes | Experimental Google Labs tool (free as of launch) |
| Framework integrations | — |
| Funding / ownership | Google Labs / DeepMind experimental product (launched 2025-08) |
Pricing/feature source: https://developers.googleblog.com/en/streamline-llm-evaluation-with-stax/
Frequently asked questions
Is Google Stax open source?
No — Google Stax is a proprietary/commercial product.
Can I self-host Google Stax?
No — Google Stax is cloud-only; there is no self-hosted deployment.
How much does Google Stax cost?
Free. Experimental Google Labs tool (free as of launch)