F-TIS enables heterogeneous model collaboration in GRPO by filtering off-policy samples, matching on-policy convergence while improving out-of-distribution performance by up to 12% in some setups.
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F-TIS: Harnessing Diverse Models in Collaborative GRPO
F-TIS enables heterogeneous model collaboration in GRPO by filtering off-policy samples, matching on-policy convergence while improving out-of-distribution performance by up to 12% in some setups.