StepFun vs Microsoft vs Anthropic

• StepFun
• Microsoft
• Anthropic

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Head to head on 10 boards: Anthropic places best on 7, StepFun places best on 2 and Microsoft places best on 1. All 3 ranked on 0 of 26 boards.

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StepFunMicrosoftAnthropic

Board	Read	StepFun	Microsoft	Anthropic
Chat2
Text ArenaArena ratingtodaytoday	Nov 9todaytoday	#701,448Step 5 Preview		#41,505best of the pickedClaude Opus 5.5
MultiChallengeScoretodaytoday	Nov 9todaytoday			#1067.7%Claude Haiku 5.5
Reasoning7
AA IntelligenceIndextodaytoday	Nov 9todaytoday	#2328.5Step 5 Preview		#259.1best of the pickedClaude Opus 5.5
MMLU-ProAccuracy · staletodaytoday	Nov 9todaytoday		#7576.0%Phi 4 Plus	#489.1%best of the pickedClaude Opus 4.6
LiveBenchGlobal averagetodaytoday	Nov 9todaytoday			#183.4%Claude Fable 5.1
HLEAccuracytodaytoday	Nov 9todaytoday			#246.5%Claude Fable 5.1
GPQA DiamondAccuracytodaytoday	Nov 9todaytoday			#395.6%Claude Sonnet 5.5
Epoch ECIECItodaytoday	Nov 9todaytoday			#3168.4Claude Opus 5.5
ARC-AGI-2Scoretodaytoday	Nov 9todaytoday			#393.3%Claude Opus 5.5
Coding4
WebDev ArenaArena ratingtodaytoday	Nov 9todaytoday	#381,572Step 5 Preview		#11,814best of the pickedClaude Opus 5.5
SWE-Bench ProResolvedtodaytoday	Nov 9todaytoday			#198.0%Claude Opus 5
SWE-bench VerifiedResolved · staletodaytoday	Nov 9todaytoday			#176.8%Claude Opus 4.5
Aider PolyglotPass rate · staletodaytoday	Nov 9todaytoday			#1072.0%Claude Opus 4
Agents and tools3
BFCLOverall accuracy · staletodaytoday	Nov 9todaytoday		#5028.8%Phi 4	#177.5%best of the pickedClaude Opus 4.5
MCP AtlasPass ratetodaytoday	Nov 9todaytoday			#387.2%Claude Fable 5.1
Search ArenaArena ratingtodaytoday	Nov 9todaytoday			#51,229Claude Fable 5
Vision2
Vision ArenaArena ratingtodaytoday	Nov 9todaytoday	#511,247Step 5 Preview		#11,309best of the pickedClaude Fable 5
Document ArenaArena ratingtodaytoday	Nov 9todaytoday			#11,499Claude Fable 5
Image2
Image EditArena ratingtodaytoday	Nov 9todaytoday	#51996Step1x Edit	#41,467best of the pickedMAI Image 2.7
Text-to-ImageArena ratingtodaytoday	Nov 9todaytoday		#61,330MAI Image 2.6
Speech2
Speech ArenaArena ratingtodaytoday	Nov 9todaytoday	#181,216best of the pickedStepaudio 2.5 TTS	#311,145Azure Hd 2.5
Open ASRAverage WERtodaytoday	Nov 9todaytoday		#35.55 WERazure-speech-09-2026 (microsoft)
Embeddings1
MTEBMean task scoretodaytoday	Nov 9todaytoday		#174.3%harrier-oss-v1-27b (microsoft)
Speed1
AA SpeedOutput speedtodaytoday	Nov 9todaytoday	#2214 tok/sStep 5 Preview		#931 tok/sbest of the pickedClaude Sonnet 5.5
Price1
AA PriceBlended pricetodaytoday	Nov 9todaytoday			#1$0.20Claude Haiku 5.5
Usage1
OpenRouterWeekly tokenstodaytoday	Nov 9todaytoday	#57.2T tokbest of the pickedStep 5 Preview		#66.8T tokClaude Opus 5.5

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.