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Model details

Fireworks: Ember-1

Ember-1 is a research-preview reasoning model from Fireworks Research that is built on top of the Kimi K3 base. Rather than treating reasoning as a raw scaling exercise, the release emphasizes efficiency at the trace level: Fireworks' own evaluations report that Ember-1 produces roughly 40% fewer generated tokens than its base model while maintaining comparable quality, giving downstream applications shorter reasoning paths and lower latency for the same kinds of problems Kimi K3 was trained to handle.

The model is positioned for coding, knowledge work, and agentic workflows where the cost and delay of long reasoning chains become a bottleneck. Alongside text it accepts image input and exposes function calling, and it ships with an approximately one-million-token context window, which together make it suitable for multi-document codebases, tool-using agents, and vision-grounded reasoning tasks that need to keep large amounts of material in play without paying for unnecessary thinking tokens.

Kilo Gatewayfireworks/ember-1

Quick Info

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Provider
Kilo Gateway
Model key
fireworks/ember-1
Release date
Sep 24, 2026
Last updated
Sep 24, 2026
Input modalities
Output modalities
Capabilities

Cost

Input token cost
$3.00
Output token cost
$15.00

Limits

Output tokens
943,718 tokens
Context window
1,048,576 tokens

Latest news about Fireworks: Ember-1

Kilo Gateway

CoverageBenchmark

Benchable lists the Fireworks endpoint fireworks/ember-1-20260923 with the same author description: a specialized reasoning model from Fireworks Research built on Kimi K3, producing shorter reasoning traces using roughly 40% fewer tokens while maintaining comparable quality. The model accepts image and text input and p The Benchable page records a 1M context window, a release date of September 23, 2026, and pricing of $3 per million prompt tokens, $15 per million completion tokens, and $0.30 per million input cache read tokens. The benchmark results table on this page is empty, with no executed evaluations available. The Fireworks en

Kilo Gateway

CoverageBenchmark

Fireworks' Ember-1 is described as a specialized reasoning model from Fireworks Research built on Kimi K3, designed to produce shorter reasoning traces using roughly 40% fewer tokens than the base model while maintaining comparable quality, per its listing on LM Market Cap. The model is positioned for coding, knowledge The aggregator records Ember-1 with a 1.0M token context window (with a 943.7K max output), API pricing of $3 per million input tokens and $15 per million output tokens, and a release date of September 24, 2026. Capability, pricing, context, recency, and output capacity each contribute to the composite signal scores (8

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