OpenRouter, a leading LLM aggregator, tracks the rapid growth of available models and intelligence metrics.
Between April 2023 and October 2025, OpenRouter and Artificial Analysis documented significant increases in both open-source and closed-source models.
The number of models available on OpenRouter expanded from 63 in early 2024 to 668 by December 2025.
This data informs OpenRouter's daily research dataset, providing insights into the evolving LLM market.
OpenRouter offers a standardized API for accessing hundreds of models from various providers.
Examples
- The cumulative number of models available on OpenRouter grew substantially.
- Both open-source and closed-source models saw rapid increases in availability.
- The number of inference providers also showed significant cumulative growth.
- The intelligence index of newly released models demonstrated an upward trend.
- OpenRouter immediately integrates new models upon their release by creators.
So, tracking "model and provider growth" from 2023 to 2025 informs the claim that OpenRouter models exploded from 63 to 668? That sounds like a lot of hype.
Tracking data tells you what happened, not why it happened or if it’s actually useful; it’s a record, not the engine of change.
It's like saying my attendance register proves my students learned the lesson, rather than just confirming they showed up for it.
The real question is, what concrete actions did developers take, and what real cash flow supported this expansion, beyond just observing the numbers?