Reflection vs Anthropic vs DeepSeek vs Microsoft

Head to head on 15 boards: Anthropic places best on 12, DeepSeek places best on 2, Reflection places best on 1 and Microsoft places best on 0. All 4 ranked on 1 of 26 boards.

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RReflectionAnthropicDeepSeekMicrosoft

Board	Read	RReflection	Anthropic	DeepSeek	Microsoft
Chat2
Text ArenaArena ratingtodaytoday	Oct 21todaytoday		#21,507best of the pickedClaude Opus 5.5	#341,475DeepSeek V4.1 Flash
MultiChallengeScoretodaytoday	Oct 21todaytoday		#667.7%best of the pickedClaude Haiku 5.5	#2646.1%DeepSeek V3P1
Reasoning7
ARC-AGI-2Scoretodaytoday	Oct 21todaytoday	#4623.5%Beam 1.0	#393.3%best of the pickedClaude Opus 5.5	#2172.9%DeepSeek V4.1 Flash
MMLU-ProAccuracy · staletodaytoday	Oct 21todaytoday		#489.1%best of the pickedClaude Opus 4.6	#3385.0%DeepSeek-V3.2	#7576.0%Phi 4 Plus
Epoch ECIECItodaytoday	Oct 21todaytoday		#1168.8best of the pickedClaude Opus 5.5	#32155.9DeepSeek V4.1 Flash
LiveBenchGlobal averagetodaytoday	Oct 21todaytoday		#183.4%best of the pickedClaude Fable 5.1	#881.1%DeepSeek V4.1 Flash
GPQA DiamondAccuracytodaytoday	Oct 21todaytoday		#395.6%best of the pickedClaude Sonnet 5.5	#2591.7%DeepSeek V4 Pro 0813
AA IntelligenceIndextodaytoday	Oct 21todaytoday		#158.0Claude Opus 5.5
HLEAccuracytodaytoday	Oct 21todaytoday		#246.5%Claude Fable 5.1
Coding4
WebDev ArenaArena ratingtodaytoday	Oct 21todaytoday		#11,814best of the pickedClaude Opus 5.5	#191,619DeepSeek V4.1 Flash
SWE-bench VerifiedResolved · staletodaytoday	Oct 21todaytoday		#176.8%best of the pickedClaude Opus 4.5	#1170.0%DeepSeek-V3.2
Aider PolyglotPass rate · staletodaytoday	Oct 21todaytoday		#1072.0%Claude Opus 4	#874.2%best of the pickedDeepSeek-V3.2
SWE-Bench ProResolvedtodaytoday	Oct 21todaytoday		#198.0%Claude Opus 5
Agents and tools3
BFCLOverall accuracy · staletodaytoday	Oct 21todaytoday		#177.5%best of the pickedClaude Opus 4.5	#1256.7%DeepSeek-V3.2	#5028.8%Phi 4
MCP AtlasPass ratetodaytoday	Oct 21todaytoday		#287.2%Claude Fable 5.1
Search ArenaArena ratingtodaytoday	Oct 21todaytoday		#21,253Claude Opus 4.6
Vision2
Vision ArenaArena ratingtodaytoday	Oct 21todaytoday		#11,308best of the pickedClaude Fable 5	#391,260DeepSeek V4.1 Flash
Document ArenaArena ratingtodaytoday	Oct 21todaytoday		#11,516Claude Opus 5
Image2
Text-to-ImageArena ratingtodaytoday	Oct 21todaytoday				#51,332MAI Image 2.6
Image EditArena ratingtodaytoday	Oct 21todaytoday				#51,428MAI Image 2.6
Speech2
Open ASRAverage WERtodaytoday	Oct 21todaytoday				#44.26 WERazure-speech-06-2026 (microsoft)
Speech ArenaArena ratingtodaytoday	Oct 21todaytoday				#291,141Azure Hd 2.5
Embeddings1
MTEBMean task scoretodaytoday	Oct 21todaytoday				#174.3%harrier-oss-v1-27b (microsoft)
Speed1
AA SpeedOutput speedtodaytoday	Oct 21todaytoday	#6345 tok/sbest of the pickedBeam 1.0	#12236 tok/sClaude Haiku 5.5	#16209 tok/sDeepSeek V4.1 Flash	#7545 tok/sPhi 4 Mini
Price1
AA PriceBlended pricetodaytoday	Oct 21todaytoday		#3$0.20best of the pickedClaude Haiku 5.5	#8$0.53DeepSeek V4.1 Flash
Usage1
OpenRouterWeekly tokenstodaytoday	Oct 21todaytoday		#56.8T tokClaude Opus 5.5	#127.3T tokbest of the pickedDeepSeek V4.1 Flash

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.