Open source
Source code publicly available (MIT, Apache, or similar)
What is open source?
Open weights means the model's parameters are publicly available — you can download and run the model yourself. Think of it as: the recipe is public but you still need the kitchen.
Why it matters
Open weights give you the freedom to self-host, fine-tune, and inspect the model. This matters for data sovereignty, cost control at scale, and avoiding vendor lock-in. However, open weights also mean you bear the infrastructure and maintenance cost.
Where models stand
3 models with open source enabled:
Data available for 27 of 30 tracked models.
How sourc.dev tracks this
sourc.dev verifies open source manually from official provider documentation, API responses, and published specifications. Every data point includes a source URL and verification date. When a value changes, the old value is preserved in the history table and the new value is recorded alongside it. Nothing is overwritten — the full timeline is always available.
Related
Frequently asked questions
How does sourc.dev measure open source?
sourc.dev verifies this attribute manually from provider documentation. Every data point includes a source URL and verification date. Changes are recorded in the history table — nothing is overwritten.
How often is open source updated?
This attribute is verified periodically against provider documentation. When sourc.dev detects a change, the new value is recorded alongside the old one with full provenance.
Why does open source matter for developers?
Understanding open source helps developers make informed decisions when choosing between models and providers. Rather than relying on marketing claims, sourc.dev provides verified, dated, source-linked data so the data decides.