OpenRouter lets you easily switch between different models by aggregating them...

https://wiki-site.win/index.php/What_Are_Context_Resets_in_Multi-Model_Tools_and_Why_They_Hurt

OpenRouter lets you easily switch between different models by aggregating them in one place, but it resets context each time you change models. Suprmind, on the other hand, can run models sequentially to build on previous answers without losing context