GPT-5.6 Luna vs Claude Fable 5.1

• GPT-5.6 Luna
• Claude Fable 5.1

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Head to head on 7 boards: Claude Fable 5.1 places best on 7 and GPT-5.6 Luna places best on 0. Both ranked on 7 of 16 boards.

Board	Read	GPT-5.6 Luna	Claude Fable 5.1
Chat1
Text ArenaArena ratingtodaytoday	Nov 9todaytoday	#631,453	#61,504best of the picked
Reasoning6
LiveBenchGlobal averagetodaytoday	Nov 9todaytoday	#4273.6%	#183.4%best of the picked
Epoch ECIECItodaytoday	Nov 9todaytoday	#30156.8	#5166.9best of the picked
ARC-AGI-2Scoretodaytoday	Nov 9todaytoday	#3759.6%	#790.0%best of the picked
HLEAccuracytodaytoday	Nov 9todaytoday		#246.5%
AA IntelligenceIndextodaytoday	Nov 9todaytoday		#950.0
GPQA DiamondAccuracytodaytoday	Nov 9todaytoday	#3091.6%
Coding2
WebDev ArenaArena ratingtodaytoday	Nov 9todaytoday	#521,519	#51,746best of the picked
SWE-Bench ProResolvedtodaytoday	Nov 9todaytoday		#292.2%
Agents and tools2
MCP AtlasPass ratetodaytoday	Nov 9todaytoday		#387.2%
Search ArenaArena ratingtodaytoday	Nov 9todaytoday		#71,227
Vision2
Document ArenaArena ratingtodaytoday	Nov 9todaytoday	#211,460	#21,499best of the picked
Vision ArenaArena ratingtodaytoday	Nov 9todaytoday	#411,256	#131,288best of the picked
Speed1
AA SpeedOutput speedtodaytoday	Nov 9todaytoday		#1422 tok/s
Price1
AA PriceBlended pricetodaytoday	Nov 9todaytoday		#17$20.0
Usage1
OpenRouterWeekly tokenstodaytoday	Nov 9todaytoday	#172.7T 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.