Fireworks AI Releases Kimi K3 Open Frontier Model

Fireworks AI has launched Kimi K3, a 2.8-trillion parameter open-weights model developed with Kimi_Moonshot. The model delivers performance matching closed frontier systems such as Opus 5 while running at up to 5x lower cost per task. It uses Kimi Delta Attention and native visual understanding, runs on US-hosted infrastructure with zero-data-retention options, and supports immediate training via LoRA adapters with no setup required. The release gives users ownership of frontier-level intelligence through pay-by-token access on the Fireworks platform.