Open + closed models = better together. Our previous research with @harvey showed the benefits of combining a frontier closed model as an ad…

Open + closed models = better together. Our previous research with @harvey showed the benefits of combining a frontier closed model as an advisor agent with fine-tuned, open-source worker agents. Three benchmarks later, the result holds. In an even simpler set up, the open + closed duo delivers superior outcomes and 40-67% lower cost than running entirely on Opus 4.8. Read the breakdown → http://fireworks.ai/blog/frontier-open-source-worker-with-closed-source-advisor

Source: Fireworks AI (X) | 2026-06-25