GPT-5.5 Instant (June 2026) vs Muse Spark 1.1

• GPT-5.5 Instant (June 2026)
• Muse Spark 1.1

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Head to head on 3 boards: Muse Spark 1.1 places best on 3 and GPT-5.5 Instant (June 2026) places best on 0. Both ranked on 3 of 9 boards.

Board	Read	GPT-5.5 Instant (June 2026)	Muse Spark 1.1
Chat2
Text ArenaArena ratingtodaytoday	Nov 9todaytoday	#371,474	#131,490best of the picked
MultiChallengeScoretodaytoday	Nov 9todaytoday		#475.3%
Reasoning3
LiveBenchGlobal averagetodaytoday	Nov 9todaytoday		#3575.3%
Epoch ECIECItodaytoday	Nov 9todaytoday		#42154.9
GPQA DiamondAccuracytodaytoday	Nov 9todaytoday	#8582.5%
Coding1
WebDev ArenaArena ratingtodaytoday	Nov 9todaytoday		#441,542
Agents and tools1
MCP AtlasPass ratetodaytoday	Nov 9todaytoday		#288.1%
Vision2
Document ArenaArena ratingtodaytoday	Nov 9todaytoday	#221,459	#91,479best of the picked
Vision ArenaArena ratingtodaytoday	Nov 9todaytoday	#261,277	#241,279best of the picked

Green marks the best placing among the picked where two or more are ranked; ties are marked for each. Ranks are each board's own order (lower is better), scores as the board published them. Dash: not on that board.