Ember-1

Fireworks🇺🇸fireworks/ember-1

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Ember-1 is Fireworks Research's reasoning model built on Moonshot AI's Kimi K3, retrained (not a new base model) to produce reasoning traces roughly 40% shorter while keeping K3-level quality, with text and image input and a 1M-token context window. Released September 23, 2026 as a research preview, it targets coding, knowledge work, and multi-turn agent workflows where reasoning tokens drive most of the cost and latency.