Claude Sonnet 4.5 vs GPT-6 Astra vs Muse Spark 1.1

• Claude Sonnet 4.5
• GPT-6 Astra
• Muse Spark 1.1

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Head to head on 12 boards: GPT-6 Astra places best on 8, Muse Spark 1.1 places best on 4 and Claude Sonnet 4.5 places best on 0. All 3 ranked on 3 of 19 boards.

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Claude Sonnet 4.5GPT-6 AstraMuse Spark 1.1

Board	Read	Claude Sonnet 4.5	GPT-6 Astra	Muse Spark 1.1
Chat2
Text ArenaArena ratingtodaytoday	Nov 9todaytoday	#561,456	#311,475	#131,490best of the picked
MultiChallengeScoretodaytoday	Nov 9todaytoday	#2555.3%		#475.3%best of the picked
Reasoning7
Epoch ECIECItodaytoday	Nov 9todaytoday	#73147.6	#1169.1best of the picked	#42154.9
HLEAccuracytodaytoday	Nov 9todaytoday	#2313.7%	#154.8%best of the picked
ARC-AGI-2Scoretodaytoday	Nov 9todaytoday	#5513.6%	#195.0%best of the picked
GPQA DiamondAccuracytodaytoday	Nov 9todaytoday	#8682.3%	#295.8%best of the picked
LiveBenchGlobal averagetodaytoday	Nov 9todaytoday		#482.2%best of the picked	#3575.3%
AA IntelligenceIndextodaytoday	Nov 9todaytoday		#356.9
MMLU-ProAccuracy · staletodaytoday	Nov 9todaytoday	#1087.4%
Coding3
WebDev ArenaArena ratingtodaytoday	Nov 9todaytoday		#31,770best of the picked	#441,542
SWE-Bench ProResolvedtodaytoday	Nov 9todaytoday		#490.2%
SWE-bench VerifiedResolved · staletodaytoday	Nov 9todaytoday	#971.4%
Agents and tools3
MCP AtlasPass ratetodaytoday	Nov 9todaytoday	#3159.5%		#288.1%best of the picked
Search ArenaArena ratingtodaytoday	Nov 9todaytoday	#311,175	#31,245best of the picked
BFCLOverall accuracy · staletodaytoday	Nov 9todaytoday	#273.2%
Vision2
Document ArenaArena ratingtodaytoday	Nov 9todaytoday	#301,448	#111,477	#91,479best of the picked
Vision ArenaArena ratingtodaytoday	Nov 9todaytoday		#171,285best of the picked	#241,279
Speed1
AA SpeedOutput speedtodaytoday	Nov 9todaytoday		#1621 tok/s
Price1
AA PriceBlended pricetodaytoday	Nov 9todaytoday		#17$20.0

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.