The Grok 4 Fast and Grok Code Fast models have really impressed me. The only issue I've had is reaching a rate limit on the Grok 4 Fast model. Amazing pricing for highly capable models with good tool calling support.
Some times I've had faster success with some of the larger Qwen3 models (480B and 235B variants). I like them in combination with the Repomix CLI to copy an entire project into context and get a response very quickly with some of the accelerated providers like Cerebras.