Coding agents break when models are "almost" bug-free. But almost valid JSON is just not the same valid JSON. Fun piece here from @akshay_pachaar shows why SFT can't fix this, and how GRPO trains against correctness directly. Worth noting: the reason this works is inference…

Fireworks Training Platform keeps expanding. Leading US open weight model Nemotron 3 Ultra is now ready for post-training: SFT and DPO via LoRA or full-parameter, on the same infrastructure that serves it. The model you train is the model you ship: fireworks.ai/train

Fireworks was named to @Redpoint's InfraRed 100 which recognizes the companies building the foundation for the next wave of AI. We're just getting started. Come build with us: fireworks.ai/careers

We spent the week at #MSBuild talking about one thing: fine-tuning has gone from "maybe not worth it" to your actual competitive moat. @lqiao sat down with @yina_arenas to break down why and what Fireworks + @Microsoft Foundry makes possible when you stop treating models as…

NVIDIA Nemotron 3 Ultra is on Fireworks, day zero. Nemotron Ultra is an open model for frontier reasoning and orchestration in long-running autonomous agents. Think use cases like coding agents, deep research, and complex enterprise workflows. Read on:…