Ember-1
Summary
Ember-1 is a language model from Fireworks, released on 24 Sept 2026. It accepts text and images and generates text, with a 1M-token context window and up to 944K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $3 per million input tokens and $15 per million output tokens (OpenRouter), across 1 provider we track.
Ember-1 is a specialized reasoning model from Fireworks Research, built on [Kimi K3](https://openrouter.ai/moonshotai/kimi-k3). It is designed to make every token go further: it produces shorter reasoning traces, using roughly 40%...
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | Fireworks |
|---|---|
| Release date | 24 Sept 2026 [OpenRouter] |
| Status | Generally available |
| Context window | 1M (1,048,576 tokens) [OpenRouter] |
| Max output | 944K tokens [OpenRouter] |
| Input | Text and images [OpenRouter] |
| Output | Text [OpenRouter] |
| Reasoning mode | Yes [OpenRouter] |
| Tool calling | Yes [OpenRouter] |
| Structured output | Yes [OpenRouter] |
Ember-1 API pricing by provider
USD per million tokens. Sorted by input price.
| Provider | Input | Output | Cached input | Context | Source |
|---|---|---|---|---|---|
| OpenRouter fireworks/ember-1 | $3 | $15 | $0.30 | 1M | OpenRouter, 4 Oct 2026 |
Frequently asked questions
What is the context window of Ember-1?
Ember-1 has a context window of 1,048,576 tokens (1M) and can generate up to 943,718 tokens in a single response, according to OpenRouter.
How much does the Ember-1 API cost?
Ember-1 is listed from $3 per million input tokens and $15 per million output tokens (OpenRouter). Prices last verified 4 Oct 2026.
When was Ember-1 released?
Fireworks released Ember-1 on 24 Sept 2026, according to OpenRouter.
Change history
No changes detected since we started tracking this model. We re-check every source daily.