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Muse Spark 1.2

Meta · 2026-08-05

Muse Spark 1.2 is Meta's August 2026 coding-focused update to Muse Spark 1.1. It powers Muse Code and supports long-horizon software engineering and multimodal understanding.

Benchmark scores

BenchmarkScore
AA-Briefcase Elo1344
AA-Briefcase v1.1 Elo1340
AA-LCR v1.179.0
AA-Omniscience Index27.2
Antidote: Everyday Edition1028
Arena Code WebDev — Brand & Marketing1520
Arena Code WebDev — Consumer Product1531
Arena Code WebDev — Content Creation Tools1539
Arena Code WebDev — Data & Analytics1516
Arena Code WebDev — Gaming1570
Arena Code WebDev — HTML1535
Arena Code WebDev — React1529
Arena Code WebDev — Reference-Based Design1549
Arena Code WebDev — Simulations1519
Arena Text — Business, Management & Financial Ops (No Style Control)1497
Arena Text — Chinese (No Style Control)1521
Arena Text — Creative Writing (No Style Control)1448
Arena Text — English (No Style Control)1492
Arena Text — Entertainment, Sports & Media (No Style Control)1456
Arena Text — Exclude Ties (No Style Control)1502
Arena Text — Exclude Ties (Style Controlled)1521
Arena Text — Expert (No Style Control)1488
Arena Text — Hard Prompts (No Style Control)1493
Arena Text — Hard Prompts English (No Style Control)1488
Arena Text — Instruction Following (No Style Control)1471
Arena Text — Legal & Government (No Style Control)1532
Arena Text — Life, Physical & Social Science (No Style Control)1514
Arena Text — Longer Query (No Style Control)1487
Arena Text — Medicine & Healthcare (No Style Control)1515
Arena Text — Multi-turn (No Style Control)1508
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