Quanta AI Labs

Meta · Coding Agents

Muse Spark 1.2 & Muse Code

Meta enters the coding-agent fight with a coding model plus a terminal agent running persistent async background agents. Muse Spark 1.2 scores 82.9% on Terminal-Bench 2.1 - behind Claude Opus 5 at 86.7%, ahead of GPT-5.6 Terra at 81.8% - and 59.3% on DeepSWE 1.1. Numbers come from Meta’s own harness; independent Vals testing places it 14th on the common harness.

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