# Together AI launches custom SFT and RL training for open models > Source: > Published: 2026-10-20 01:16:24+00:00 # Together AI launches custom SFT and RL training for open models **The service lets developers set the training loop and keep the resulting weights, while Together supplies tuned GPU infrastructure and deployment.** By [Ryan Merket](https://runtimewire.com/author/ryan-merket) · Published Primary source: [X](https://x.com/togethercompute/status/2112241595273621857) ## Why it matters Together is extending its AI cloud from model access and inference into custom training. Developers get control of training recipes and downloadable weights; Together can also sell the infrastructure and deployment around each experiment. [Together AI CEO Vipul Ved Prakash](https://x.com/vipulved) said the company launched Together Post-Training on October 19th, opening a managed service for developers to customize open models with supervised fine-tuning (SFT) or [reinforcement learning](https://runtimewire.com/models/huggingface/lobonexequiel-reinforcement-learning-daff1a058d32e2ca) (RL). In a [thread on X](https://x.com/togethercompute/status/2112241595273621857), Together said developers can define their data, rewards, environments and training loop while it runs the underlying infrastructure.… When you purchase through links in our articles, [we may earn a small commission](https://runtimewire.com/affiliate-monetization-standards). This doesn’t affect our editorial independence.