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K2 Think V2 vs Muse Spark vs Claude Fable 5.1 vs Gemini 3.8 Flash

One row per board where at least one is ranked, from each board's current capture.

ModelsVendorsOpen vs closed
  • K2 Think V2
  • Muse Spark
  • Claude Fable 5.1
  • Gemini 3.8 Flash

Head to head on 14 boards: Claude Fable 5.1 places best on 10, Gemini 3.8 Flash places best on 3, Muse Spark places best on 1 and K2 Think V2 places best on 0. All 4 ranked on 0 of 16 boards.

Two at a time on this screen. Tap one to swap it in.

BoardK2 Think V2Muse SparkClaude Fable 5.1Gemini 3.8 Flash
Chat2
Text ArenaArena ratingyesterday#121,489#61,501best of the picked#71,495
MultiChallengeScoreyesterday#175.5%
Reasoning6
HLEAccuracyyesterday#640.6%#246.5%best of the picked#444.5%
AA IntelligenceIndexyesterday#9011.5#353.4best of the picked#1640.9
Epoch ECIECIyesterday#44152.0#5164.7best of the picked#20156.7
LiveBenchGlobal averageyesterday#183.4%best of the picked#3275.8%
GPQA DiamondAccuracyyesterday#4189.8%#395.4%best of the picked
ARC-AGI-2Scoreyesterday#690.0%best of the picked#889.2%
Coding2
SWE-Bench ProResolvedyesterday#292.2%best of the picked#958.8%
WebDev ArenaArena ratingyesterday#51,749best of the picked#251,583
Agents and tools1
MCP AtlasPass rateyesterday#982.2%#287.2%best of the picked
Vision2
Vision ArenaArena ratingyesterday#61,294best of the picked#131,288#91,290
Document ArenaArena ratingyesterday#241,444#21,513best of the picked
Speed1
AA SpeedOutput speedyesterday#1568 tok/s#1249 tok/sbest of the picked
Price1
AA PriceBlended priceyesterday#24$20.0#10$1.50best of the picked
Usage1
OpenRouterWeekly tokensyesterday#132.2T 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.

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