Fireworks: Ember-1
Ember-1 is a reasoning model from Fireworks released on Sep 23, 2026. It reads text and images and writes text, with a 1.05M token context window and up to 944K tokens per reply.
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It costs $3 per million input tokens and $15 per million output tokens. Cached input bills at $0.30, 90% less than fresh input.
It supports tool calling, structured JSON output and prompt caching.
2 providers serve it, including Vercel AI Gateway and Kilo Gateway.
- Modalities
- In / out price
- $3 / $15 per 1M
- Context
- 1.05M
- Max output
- 944K
- Released
- Sep 23, 2026
- Knowledge cutoff
- n/a
- Tool calling
- Structured output
- Reasoning
- Prompt caching
- Open weights
- Free to use
Ember-1 pricing
USD, as listed on Oct 15, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.
| Input | $3 / 1M tokens | |
|---|---|---|
| Output | $15 / 1M tokens | |
| Cached input (read) | $0.30 / 1M tokens | 90% off input |
Ember-1 providers
2 providers serve it, including Vercel AI Gateway and Kilo Gateway. Each host sets its own price and limits, so the cheapest one is not always the one with the longest context.
| Provider | Input /M | Output /M | Cache read /M | Context | Max output |
|---|---|---|---|---|---|
| Vercel AI Gateway | $3 | $15 | $0.30 | 1.05M | 1.05M |
| Kilo Gateway | $3 | $15 | $0.30 | 1.05M | 944K |
What Ember-1 costs per month
Pick a workload close to yours or type your own volumes.
Supported request parameters
What you can set when you call Ember-1 through an OpenAI compatible API.
- Tools
tools - Structured outputs
structured_outputs - Reasoning
reasoning - Temperature
temperature
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More from Fireworks
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Ember-1 questions
How much does the Ember-1 API cost?
$3 per million input tokens and $15 per million output tokens, with cached input at $0.30. The estimator on this page turns that into a monthly bill for your own workload.
What is the context window of Ember-1?
1,048,576 tokens of input, and it can write up to 943,718 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.
Which providers serve Ember-1?
2 providers serve it, including Vercel AI Gateway and Kilo Gateway. Prices differ by host, so the Providers table on this page lists each one with its input and output price.
Does Ember-1 support tool calling?
Yes. It accepts tool definitions and can return JSON that matches a schema, which is what an agent needs to call your APIs.
Is Ember-1 open source?
No. Fireworks serves it through an API only, so you cannot download the weights or host it yourself.
When was Ember-1 released?
Sep 23, 2026.
Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 15, 2026. The summary is written from these facts.