Ember-1 vs Grok-2
Ember-1 leads the LLM Stats Score 43.6 to 11.4. Grok-2 is 1.5x cheaper per token.
Fireworks AI · xAI · Updated for 2026
Which is better?
Ember-1 leads the overall LLM Stats Score 43.6 to 11.4, ranking #46 overall.
On price, Grok-2 is roughly 1.5x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Ember-1 also accepts a larger context window (1,040,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Ember-1
- overall performance matters — it scores 43.6 and ranks #46 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you process long inputs — it offers a 1,040,000 token context window
- you want the most recent training data — it shipped Sep 2026
Choose Grok-2
- cost matters — it's about 1.5x cheaper per token
At a glance
The differences that matter most.
Individual benchmarks
4 reported for Ember-1 · 8 for Grok-2
Ember-1 and Grok-2don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Ember-1 ($3.00/1M tokens) is 1.5x more expensive than Grok-2 ($2.00/1M tokens).
For output processing, Ember-1 ($15.00/1M tokens) is 1.5x more expensive than Grok-2 ($10.00/1M tokens).
In conclusion, Ember-1 is more expensive than Grok-2.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Ember-1 accepts 1,040,000 input tokens compared to Grok-2's 128,000 tokens. Only Grok-2 specifies output context (8,000 tokens).
Input capabilities
Documented input modalities across available providers
Grok-2 supports multimodal inputs, whereas Ember-1 does not.
Grok-2 can handle both text and other forms of data like images, making it suitable for multimodal applications.
Ember-1
Grok-2
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
Ember-1 was released on 2026-09-23, while Grok-2 was released on 2024-08-13.
Ember-1 is 26 months newer than Grok-2.
Sep 23, 2026
2 weeks ago
2.1yr newerAug 13, 2024
2.2 years ago
Knowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
Ember-1 is available from Fireworks. Grok-2 is available from xAI.
Ember-1
Grok-2
Outputs Comparison
Judge for yourself.
Run your own prompts against Ember-1 and Grok-2 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Ember-1 vs Grok-2.