Lin Qiao(@lqiao):What a week with Kimi K3 and Opus 5 launch! We compared these two great models across SWE (480), Algorithmic(100), Terminal (83), the task level quality is very close with Opus 5 being on par or better, and K3's per-task cost is 2x to 4.6x cheaper, using serverless pricing. Key measurement is per-task cost, not per-token cost. In general, open models tend to be more verbose than close models. Hence the quick study. We aim to continue to increase per-task serving efficiency (via Fireworks Inference) and quality (via Fireworks Training). Share what you find out for the tasks you care about. 👇 More details of our study --

2026.07.27 18:46

What a week with Kimi K3 and Opus 5 launch! We compared these two great models across SWE (480), Algorithmic(100), Terminal (83), the task level quality is very close with Opus 5 being on par or better, and K3's per-task cost is 2x to 4.6x cheaper, using serverless pricing. Key measurement is per-task cost, not per-token cost. In general, open models tend to be more verbose than close models. Hence the quick study. We aim to continue to increase per-task serving efficiency (via Fireworks Inference) and quality (via Fireworks Training). Share what you find out for the tasks you care about. 👇 More details of our study --