Model Comparison
Muse Spark 1.1 vs GPT-5.6 TerraWhich is better in 2026?
GPT-5.6 Terra shows notably better performance in the majority of benchmarks.
Verdict: Muse Spark 1.1 vs GPT-5.6 Terra — which is better?
Muse Spark 1.1 (by Meta) and GPT-5.6 Terra (by OpenAI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.
Muse Spark 1.1 outperforms in 1 benchmarks (Toolathlon), while GPT-5.6 Terra is better at 2 benchmarks (SWE-Bench Pro, Terminal-Bench 2.1). GPT-5.6 Terra shows notably better performance in the majority of benchmarks.
Choose Muse Spark 1.1 if…
- you are already invested in the Meta ecosystem
Choose GPT-5.6 Terra if…
- you want the strongest raw capability — it leads on 2 of 3 shared benchmarks
Performance Benchmarks
Comparative analysis across standard metrics
Muse Spark 1.1 outperforms in 1 benchmarks (Toolathlon), while GPT-5.6 Terra is better at 2 benchmarks (SWE-Bench Pro, Terminal-Bench 2.1).
GPT-5.6 Terra shows notably better performance in the majority of benchmarks.
Arena Performance
Human preference votes
Context Window
Maximum input and output token capacity
Only GPT-5.6 Terra specifies input context (1,050,000 tokens). Only GPT-5.6 Terra specifies output context (128,000 tokens).
Input Capabilities
Supported data types and modalities
Both Muse Spark 1.1 and GPT-5.6 Terra support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Muse Spark 1.1
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
Both models were released on 2026-07-09.
They likely represent similar generations of model development.
Jul 9, 2026
1 weeks ago
Jul 9, 2026
1 weeks ago
Knowledge Cutoff
When training data ends
GPT-5.6 Terra has a documented knowledge cutoff of 2026-02-16, while Muse Spark 1.1'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 Muse Spark 1.1's cutoff date.
—
Feb 2026
Outputs Comparison
Key Takeaways
Detailed Comparison
Interactive Arena
Judge for yourself.
Run your own prompts against Muse Spark 1.1 and GPT-5.6 Terra side-by-side, then vote on the output you prefer.
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FAQ
Common questions about Muse Spark 1.1 vs GPT-5.6 Terra.