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Ember-1

Fireworks AIProprietary

Description

Ember-1 is a Fireworks Research specialized model built on Moonshot Kimi K3 that shortens reasoning traces (~40% fewer tokens) while matching K3-max quality on Fireworks' evaluations. Research Preview on Fireworks Serverless (model path accounts/fireworks/models/ember-1). MoE with 2.78T parameters, 1040k context, function calling. List pricing $3.00 input / $0.30 cached input / $15.00 output per 1M tokens (same as public Kimi K3 API pricing cited in the launch blog). Self-reported benches from the Fireworks blog: Terminal-Bench 2.1 82.0%, SWE-bench Verified 92.2%, SWE-Interact 20.0% (no catalog id — noted only), DeepSWE 1.1 75.2%, tau2-bench Airline 66%. Model page verified live (Ready) as of catalog add.

Release Date
2026-09-23
Parameters
2.8T
Context Length
1.0M
Modalities
image, text

Capability Radar

80
general
80
coding
80
reasoning
68
scienceest.
70
agents
80
multimodal

Science is estimated from LLM Stats science scores or reasoning when no dedicated science benchmarks are available.

Rankings

No ranking data available

Benchmark Scores (LLM Stats)

(LLM Stats (zeroeval))

Chat

Tau2 Airline66.0%SR

Code

DeepSWE 1.175.2%SR

Reasoning

SWE-Bench Verified92.2%SR
Terminal-Bench 2.182.0%SR

AA Evaluation Indices

(Artificial Analysis)

No AA evaluation data available

LLM Stats Category Scores

(LLM Stats (zeroeval))
Frontend Development
90
Reasoning
80
General
80
Agents
80
Code
80
Chat
70
Communication
70
Tool Calling
70

Pricing

Input Price$0 / 1M tokens
Output Price$0.00002 / 1M tokens
Blended Price (3:1)$0.00001 / 1M tokens
Cache Read Price$0.3 / 1M tokens

Speed

No speed data available

Provider Price Ranking

Provider Price Ranking

5 providers

Cheapest: Fireworks AIMost Expensive: Vercel AI Gateway
ProviderInputOutput
1Fireworks AIPRIMARY
$0
$0.00002
2Fireworks
$0
$0.00002
3OpenRouter
$3
$15
4Kilo Gateway
$3
$15
5Vercel AI Gateway
$3
$15

Compare pricing across different API providers for this model.

External Sources