Their work on SERA (open training, open weights) is fantastic. 40 GPU days of time, training a competitive model, but also, a model built for further close fine-tuning. That refining and distilling models down, especially for complex code-bases, to make the model want to do the right thing, to know the process you use, has such promise. And it's done so in the open, with so much work to help you train or refine yourself, at such low costs! https://allenai.org/blog/open-coding-agents
I would also count DeepSeek because they publish and share so much. Their new caching prices are very good for not that bad models. Last week I needed to generate content via API and I spent literally $3.40 where before I would've paid easily $200. But you have to connect directly as it seems OpenRouter messes up caching somehow.