Ember-1: Benchmarks, Pricing & Context Window
Ember-1 is a language model from Fireworks, released in September 2026, with a 1.0M-token context window, and pricing from $3.00/M input, $0.300/M cached input, $15.00/M output.
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
Ember-1 benchmarks
Capability tiers
Standing within each category, adjusted for leaderboard depth.
Real tasks performance
High-confidence performance for Ember-1 across real-world prompt categories. Only 95% intervals at most 4 points wide are shown.
Performance by conversation depth
How Ember-1 holds up as conversations get longer.
Quality Tracker
Ember-1 Performance Across Datasets
Scores sourced from the model's scorecard, paper, or official blog posts
llm-stats.com - Wed Oct 07 2026Ember-1 pricing
Providers
Ember-1 starts at $3.00 per million input tokens and $15.00 per million output tokens via Fireworks. Reused prompt prefixes cost $0.300 per million cached input tokens.
| Provider | Input $/M | Cached input $/M | Output $/M | Context in / out | TTFT p95 s | Output p5 c/s | Modalities in / out |
|---|---|---|---|---|---|---|---|
 Fireworks | $3.00 | $0.300 | $15.00 | 1.0M/— | — | — | / |
Cached input is the discounted price for prompt tokens served from a provider cache. TTFT is time to first token. Output is characters per second; p5 is the sustained floor exceeded by 95% of observed requests.
Ember-1 context window
Input and output token limits for Ember-1, plus how it ranks on long-context understanding.
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Ember-1 latency
Ember-1 time to first token, sustained output throughput, and failed-request rate from live model usage over the trailing 7 days.
Ember-1 examples
Recent arena outputs from Ember-1, picked from the highest-ranked matchups.
Ember-1 license
Ember-1 is a proprietary model available under its provider's product and API terms, has 2.8T parameters.
- License
- Proprietary
- Hosted access
- Parameters
- 2.8T
Proprietary license - usage restrictions apply
Ember-1 resources
Official sources for Ember-1: provider documentation, official launch post.
Ember-1 vs other models
The most-compared alternatives to Ember-1 are Claude Mythos Preview, GPT-5.1 Thinking, GPT-5.1 Instant. Open any pair side-by-side for benchmarks, pricing, context, and latency.
Models like Ember-1
Models ranked just above and below Ember-1 by LLM Stats score.
FAQ
Common questions about Ember-1.