Together Post-Training
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- Together AI launches Together Post-Training service for RL and SFT
Together AI introduced Together Post-Training, a service for building custom models on its platform through reinforcement learning from environment rewards and supervised fine-tuning on supervision data. The company says users define the entire training loop while Together co-optimizes the underlying systems and infrastructure, with support for LoRA training (including multiple adapters sharing GPU capacity) and full-weight experiments for select models. It launches with open-weight models including Muse Spark Open, GLM 5.3, Kimi K3 and Qwen 3.8-27B, priced at a reduced $9 per GPU-hour of B200 usage for the first eight weeks.
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