Union Alpha vs Gemini 3.8 Flash vs GPT-6 Astra vs Kimi K3

Head to head on 11 boards: GPT-6 Astra places best on 8, Gemini 3.8 Flash places best on 3, Union Alpha places best on 0 and Kimi K3 places best on 0. All 4 ranked on 1 of 15 boards.

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SUnion AlphaGemini 3.8 FlashGPT-6 AstraKimi K3

Board	Read	SUnion Alpha	Gemini 3.8 Flash	GPT-6 Astra	Kimi K3
Chat1
Text ArenaArena ratingtodaytoday	Sep 27todaytoday		#81,492best of the picked	#231,478	#131,488
Reasoning6
LiveBenchGlobal averagetodaytoday	Sep 27todaytoday	#2976.1%	#3175.8%	#482.2%best of the picked	#1279.2%
GPQA DiamondAccuracytodaytoday	Sep 27todaytoday		#295.4%	#195.8%best of the picked	#1593.1%
Epoch ECIECItodaytoday	Sep 27todaytoday		#13157.1	#1166.6best of the picked	#12157.7
ARC-AGI-2Scoretodaytoday	Sep 27todaytoday		#689.2%	#195.0%best of the picked	#2660.4%
AA IntelligenceIndextodaytoday	Sep 27todaytoday		#1540.9	#352.7best of the picked	#1243.6
HLEAccuracytodaytoday	Sep 27todaytoday		#444.5%	#154.8%best of the picked
Coding2
WebDev ArenaArena ratingtodaytoday	Sep 27todaytoday		#251,580	#21,792best of the picked	#71,660
SWE-Bench ProResolvedtodaytoday	Sep 27todaytoday		#958.8%	#390.2%best of the picked	#488.2%
Agents and tools1
MCP AtlasPass ratetodaytoday	Sep 27todaytoday				#882.3%
Vision2
Document ArenaArena ratingtodaytoday	Sep 27todaytoday			#131,468
Vision ArenaArena ratingtodaytoday	Sep 27todaytoday			#141,284
Speed1
AA SpeedOutput speedtodaytoday	Sep 27todaytoday		#1308 tok/sbest of the picked	#1763 tok/s	#2438 tok/s
Price1
AA PriceBlended pricetodaytoday	Sep 27todaytoday		#9$1.50best of the picked	#23$20.0	#21$6.00
Usage1
OpenRouterWeekly tokenstodaytoday	Sep 27todaytoday		#142.2T tok

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.