OpenRouter usage shifts toward open-weight models
OpenRouter data from the last three months shows being used more than on that platform. Three months ago, were about 60% of usage and were about 40%. The ratio has now flipped, with at about 60%.
This is not a measure of the whole AI market. It only covers API traffic that goes through OpenRouter, so it can miss ChatGPT, Claude, Gemini , direct company contracts, and s. The data still suggests that people who actively choose and pay for models through OpenRouter are moving more work to .
The discussion also points out that many of these are not truly open source, because the training method and are often not released.
Key points
- OpenRouter usage shifted from about 60% to about 60% over three months.
- The data is only for API traffic through OpenRouter, not the whole AI market.
- ChatGPT, Claude, Gemini and direct enterprise usage may be missing from the picture.
- For AI agents, the trend supports testing cheaper models for routine steps to reduce token cost.
- are not always truly open source, because training details may stay private.