product · May 20, 2026

Fireworks AI Powers RL Rollouts for Cursor Composer 2.5 on Kimi K2.5 Base Model

Fireworks AI powered RL rollouts for Cursor's Composer 2.5 model launched on May 18, 2026. Cursor shipped Composer 2 and Composer 2.5 on the same Kimi K2.5 base model with performance benchmarks improving and frontier quality at open-source economics. 85 percent of the compute for these gains came from RL training. Fireworks AI supports inference-optimized open source models including Llama 3 and Mistral with minimal latency in Confluent Intelligence updates dated May 19, 2026.