Ember-1 vs GPT-5.6 Terra
Ember-1 and GPT-5.6 Terra are closely matched at 43.1 and 49.4 on the LLM Stats Score. GPT-5.6 Terra is 1.3x cheaper per token.
Fireworks AI · OpenAI · Updated for 2026
Which is better?
Ember-1 and GPT-5.6 Terra are closely matched on the overall LLM Stats Score at 43.1 and 49.4.
The models split the 2 individual benchmarks reported for both models evenly.
On price, GPT-5.6 Terra is roughly 1.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
GPT-5.6 Terra also accepts a larger context window (1,050,000 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
- you want the most recent training data — it shipped Sep 2026
Choose GPT-5.6 Terra
- cost matters — it's about 1.3x cheaper per token
- you process long inputs — it offers a 1,050,000 token context window
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
4 reported for Ember-1 · 45 for GPT-5.6 Terra
Ember-1 outperforms in 1 benchmarks (DeepSWE 1.1), while GPT-5.6 Terra is better at 1 benchmark (Terminal-Bench 2.1).
Both models are evenly matched across the benchmarks.
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 GPT-5.6 Terra ($2.00/1M tokens).
For output processing, Ember-1 ($15.00/1M tokens) is 1.3x more expensive than GPT-5.6 Terra ($12.00/1M tokens).
In conclusion, Ember-1 is more expensive than GPT-5.6 Terra.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-5.6 Terra accepts 1,050,000 input tokens compared to Ember-1's 1,040,000 tokens. Only GPT-5.6 Terra specifies output context (128,000 tokens).
Input capabilities
Documented input modalities across available providers
GPT-5.6 Terra supports multimodal inputs, whereas Ember-1 does not.
GPT-5.6 Terra can handle both text and other forms of data like images, making it suitable for multimodal applications.
Ember-1
GPT-5.6 Terra
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 GPT-5.6 Terra was released on 2026-07-09.
Ember-1 is 3 months newer than GPT-5.6 Terra.
Sep 23, 2026
2 weeks ago
2mo newerJul 9, 2026
3 months ago
Knowledge Cutoff
When training data ends
GPT-5.6 Terra has a documented knowledge cutoff of 2026-02-16, while Ember-1's cutoff date is not specified.
We can confirm GPT-5.6 Terra's training data extends to 2026-02-16, but cannot make a direct comparison without Ember-1's cutoff date.
—
Feb 2026
Provider Availability
Ember-1 is available from Fireworks. GPT-5.6 Terra is available from OpenAI.
Ember-1
GPT-5.6 Terra
Outputs Comparison
Judge for yourself.
Run your own prompts against Ember-1 and GPT-5.6 Terra side-by-side, then vote on the output you prefer.
FAQ
Common questions about Ember-1 vs GPT-5.6 Terra.