GPT-5.6 Terra vs Muse Spark

GPT-5.6 Terra leads in 1 of 8 categories

Arena ELO

Tie

Cheaper

Tie

Faster

Tie

Detailed Comparison

Category	GPT-5.6 Terra	Muse Spark
Provider	OpenAI	Meta
Context Window	128K WIN	N/A
Input Price ($/1M)	N/A	N/A
Output Price ($/1M)	N/A	N/A
Arena ELO	N/A	N/A
Coding	N/A	N/A
Reasoning	N/A	N/A
Speed (tokens/sec)	N/A	N/A
Open Source	No	No

Frequently Asked Questions

Which has a larger context window?

GPT-5.6 Terra supports 128K context, while Muse Spark supports N/A.

Is GPT-5.6 Terra or Muse Spark open source?

GPT-5.6 Terra is proprietary. Muse Spark is proprietary.

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More Comparisons

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