Fireworks AI powers Cursor AI's Composer 2.5 model training

By PulseAugur Editorial · [1 sources] · 2026-05-21 05:38

Fireworks AI is providing the inference infrastructure for Cursor AI's new Composer 2.5 model. Cursor AI's team trained the model using a large-scale reinforcement learning program that runs rollouts on Fireworks' platform. AI

IMPACT Highlights the use of specialized inference infrastructure for training advanced AI models.

RANK_REASON This is a tool/infra announcement about a specific model's training, not a frontier model release or significant industry event.

Read on X — Fireworks (inference infra) →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

COVERAGE [1]

X — Fireworks (inference infra) TIER_1 English(EN) · FireworksAI_HQ · 2026-05-21 05:38

Nathan's @cursor_ai team didn't prompt-engineer their way to Composer 2.5. They trained it. The massive RL program runs RL rollouts on Fireworks, alongside prod

Nathan's @cursor_ai team didn't prompt-engineer their way to Composer 2.5. They trained it. The massive RL program runs RL rollouts on Fireworks, alongside production inference. "Comment 🔥 to see my prompt" → may work for influencers (in 2025) Training your own model → the

COVERAGE [1]

Nathan's @cursor_ai team didn't prompt-engineer their way to Composer 2.5. They trained it. The massive RL program runs RL rollouts on Fireworks, alongside prod

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