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Benchmark

Claude Sonnet 5.5 (Max)

  • Anthropic
  • Release · September 28, 2026
  • Proprietary
  • Reasoning

Intelligence

Intelligence Index

#3 of 266
  1. 57.658Claude Opus 5.5 (Max)
  2. 5656Claude Opus 5.5 (Xhigh)
  3. 5656Claude Sonnet 5.5 (Max)
  4. 55.856Muse Wonder Full (Max)
  5. 55.155Kimi K3.1 Pro
  6. 53.654Claude Opus 5.5 (High)
  7. 53.453Claude Fable 5.1 (Max)
  8. 53.253Claude Fable 5.1 (Xhigh)
  9. 52.753GPT-6 Astra (Max)
  10. 52.653Gemini 4 Argon (High)
Data from Artificial Analysis

Evaluations

  • AA-Briefcase1,816#1
  • AA-Omniscience Accuracy54%#24
  • AA-Omniscience Non-Hallucination53%#17
  • AutomationBench-AA71.8%#4
  • GDPval-AA1,838#4
  • Humanity's Last Exam55%#8
  • GDP.pdf25.8%#8
  • Terminal-Bench 4.063.6%#2
  • AA-LCR82.7%#24
  • SciCode61%#6
  • CritPt31.4%#7
  • Terminal-Bench-Science53.3%#4
  • FrontierCode45.8%#7
  • AA-AnalystAgent57.5%#1
  • Harvey LAB-AA2.8%#11
  • AA-3D1,199#1
  • MLCR-AA41.7%#1
  • PersonalityBench: Expressiveness70.3#12
  • PersonalityBench: Organization80.2#8
  • PersonalityBench: Transparency100#1
  • PersonalityBench: Slop15.8#21
  • PersonalityBench: Informativeness85.1#6
  • PersonalityBench: Warmth70.3#10
  • PersonalityBench: Conviction53#15
  • PersonalityBench: Imagination82.7#5
Claude Sonnet 5.5 (Max)Median
Data from Artificial Analysis

Cost per task

Cost per task

$ per Intelligence Index task · #22 of 24
  1. $1.991.99Gemini 4 Argon (High)
  2. $2.012.01GLM-5.3 (Max)
  3. $2.112.11Kimi K3.1 Pro
  4. $3.263.26GPT-6 Astra (Max)
  5. $3.743.74Grok 4.7 (Xhigh)
  6. $4.544.54Muse Wonder (Max)
  7. $5.415.41Qwen3.8 Max (0902)
  8. $5.465.46Claude Sonnet 5.5 (Max)
  9. $5.985.98Claude Opus 5.5 (Max)
  10. $7.637.63Claude Fable 5.1 (Max)
Data from Artificial Analysis

Time per task

seconds per task · #23 of 26
  1. 723723Gemini 4 Argon (High)
  2. 736736Claude Fable 5.1 (Max)
  3. 791791Claude Opus 5.5 (Max)
  4. 824824GLM-5.3-Flash
  5. 846846Kimi K3.1 Pro
  6. 901901Grok 4.7 (Xhigh)
  7. 936936Claude Sonnet 5.5 (Max)
  8. 1,0131,013MiMo-V2.6-Pro
  9. 1,2001,200Qwen3.8 27B (Xhigh)
  10. 2,0572,057Qwen3.8 Max (0902)
Data from Artificial Analysis

Tokens per task

output tokens per task · #27 of 27
  1. 71K71KGemini 3.8 Flash (High)
  2. 71.1K71KGLM-5.3 (Max)
  3. 78.1K78KClaude Fable 5.1 (Max)
  4. 78.6K79KMiniMax-M3.1-Flash
  5. 80.6K81KGrok 4.7 (Xhigh)
  6. 89.5K90KDeepSeek V4.1 Flash 1017 (Max)
  7. 107.7K108KQwen3.8 Max (0902)
  8. 119.2K119KClaude Opus 5.5 (Max)
  9. 162.2K162KClaude Haiku 5.5 (Max)
  10. 197.4K197KClaude Sonnet 5.5 (Max)
Data from Artificial Analysis

Speed and price

Speed

tokens per second · #52 of 162
  1. 147147Qwen3.6 35B A3B (Non-reasoning)
  2. 143143Qwen3.5 122B A10B (Non-reasoning)
  3. 140140GPT-6 Luna (Max)
  4. 137137Gemini 3.8 Flash (High)
  5. 136136Apertus 8B Instruct
  6. 134134Claude Sonnet 5.5 (Max)
  7. 133133Qwen3 Next 80B A3B Instruct
  8. 132132Gemini 3.1 Pro Preview
  9. 131131Qwen3.6 35B A3B (Reasoning)
  10. 130130GPT-5.6 Terra (Max)
Data from Artificial Analysis

Latency

seconds to first token · #161 of 162
  1. 102.7103GPT-5.6 Terra (Max)
  2. 106.6107GPT-6.1 Sol (Xhigh)
  3. 109.6110Claude Opus 5.5 (Xhigh)
  4. 161.5162GPT-6 Astra (Xhigh)
  5. 180.5181Claude Fable 5.1 (Max)
  6. 236236GPT-6.1 Sol (Max)
  7. 278.3278GPT-6 Astra (Max)
  8. 322.2322Claude Haiku 5.5 (Max)
  9. 371.6372Claude Sonnet 5.5 (Max)
  10. 652.6653Claude Opus 5.5 (Max)
Data from Artificial Analysis

Price

$ per 1M tokens (3:1) · #132 of 169
  1. $33Mistral Medium 3.5
  2. $3.443.44Nova 2.0 Pro Preview (Medium)
  3. $3.443.44Nova 2.0 Pro Preview (Low)
  4. $3.443.44Nova 2.0 Pro Preview (Non-reasoning)
  5. $3.53.5o3
  6. $44Claude Sonnet 5.5 (Max)
  7. $44Kimi K3.1 Pro
  8. $44Gemini 4 Argon (High)
  9. $44Claude Sonnet 5.5 (Xhigh)
  10. $44GPT-6.1 Sol (Max)
Data from Artificial Analysis

Nearby models

  • Claude Opus 5.5 (Max)Anthropic57.6
  • Claude Opus 5.5 (Xhigh)Anthropic56
  • Muse Wonder Full (Max)Meta55.8
  • Kimi K3.1 ProKimi55.1
  • Claude Opus 5.5 (High)Anthropic53.6
  • Claude Fable 5.1 (Max)Anthropic53.4
  • Claude Fable 5.1 (Xhigh)Anthropic53.2
  • GPT-6 Astra (Max)OpenAI52.7
Data from Artificial Analysis

Same lab

  • Claude Sonnet 5.5 (Xhigh)Anthropic51.9
  • Claude Opus 5.5 (Medium)Anthropic51.2
  • Claude Fable 5.1 (High)Anthropic51.2
  • Claude Fable 5.1 (Medium)Anthropic48.9
  • Claude Sonnet 5.5 (High)Anthropic46.8
  • Claude Fable 5.1 (Low)Anthropic46.8
  • Claude Haiku 5.5 (Max)Anthropic43.4
  • Claude Opus 5.5 (Low)Anthropic42.3
Data from Artificial Analysis
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