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%...
Details
| Field | Value |
|---|---|
| id | fireworks/ember-1 |
| modality | text+image->text |
| context_length | 1048576 |
| max_output_tokens | 943718 |
| release_date | 2026-09-24 |
| is_open_weights | no |
| supports_tool_call | yes |
| supports_reasoning | yes |
| supports_structured_output | yes |
| supports_attachment | yes |
| input_modalities | text, image |
| output_modalities | text |