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Fireworks AIEmber familyCurrentReasoning modelReleased 23 Sep 2026

Ember-1 (Fireworks Research)

Built for coding agents and multi-turn systems where reasoning tokens dominate cost. Fewer tokens lower per-task cost, but Fireworks’ own caveat (per Runtime Wire) is that token savings alone do not prove lower latency across workloads.

Model idfireworks/ember-1

Price$3 in, $15 out per 1M tokens

Checked10 October 2026

No published training cutoff

At least414events since its release on 23 September 2026

13 historic, 75 major. 17 days of news.

Fireworks AI doesn’t publish a training cutoff, so we count from its release date. The real gap is larger.

Five things it has never heard of

How to call it

2 ways to use Ember-1 (Fireworks Research), with the model id each provider expects.

Providers, model ids, endpoints and docs for Ember-1 (Fireworks Research)
ProviderModel idEndpointDocs
Fireworks AI fireworks.ai
OpenRouter fireworks/ember-1 openrouter.ai

Pricing

Prices for Ember-1 (Fireworks Research)
Input$3 per 1M tokens
Cached input$0.30 per 1M tokens
Output$15 per 1M tokens

As published: “per 1M tokens (USD)”.

Source: openrouter.ai, checked 10 October 2026.

Specs

Input
Text
Output
Text
Context window
1,048,576 tokens
Max output
943,718 tokens
Open weights
No
Licence
Proprietary
Training cutoff
Not published
Released
23 September 2026
Status
Current
Type
Reasoning model

What stands out

What its maker marketed at launch, and what people found later, each with its source.

  • Shorter reasoning traces on Kimi K3

    Post-trained from Kimi K3 to produce comparable answers with about 40% fewer tokens (Fireworks); SWE-bench Verified 92.2% vs 93.2% for K3, Terminal-Bench 2.1 82.0% vs 80.9%; one customer A/B test cut total tokens 39% and reasoning tokens 71.3% (vendor-reported, via Runtime Wire).

    Source: runtimewire.com

Notes

First model of Fireworks Research’s Ember series, launched Sept 23, 2026 as a research preview and later listed as production-ready (Runtime Wire). Derivative of Moonshot’s open-weight Kimi K3; no weights released. Fireworks’ own blog post (fireworks.ai/blog/ember-1) was not read directly; prices and context from the OpenRouter API (checked 2026-10-10).