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Benchmark

Claude Fable 5.1 (Max)

  • Anthropic
  • Release · September 1, 2026
  • Proprietary
  • Reasoning

Intelligence

Intelligence Index

#7 of 266
  1. 5656Claude Opus 5.5 (Xhigh)
  2. 5656Claude Sonnet 5.5 (Max)
  3. 55.856Muse Wonder Full (Max)
  4. 55.155Kimi K3.1 Pro
  5. 53.654Claude Opus 5.5 (High)
  6. 53.453Claude Fable 5.1 (Max)
  7. 53.253Claude Fable 5.1 (Xhigh)
  8. 52.753GPT-6 Astra (Max)
  9. 52.653Gemini 4 Argon (High)
  10. 52.452GPT-6 Astra (Xhigh)
Data from Artificial Analysis

Evaluations

  • AA-Briefcase1,671#5
  • AA-Omniscience Accuracy67.2%#1
  • AA-Omniscience Non-Hallucination27.4%#25
  • AutomationBench-AA59.4%#16
  • GDPval-AA1,755#6
  • Humanity's Last Exam59.1%#2
  • GDP.pdf26.2%#6
  • Terminal-Bench 4.052%#16
  • AA-LCR85.3%#4
  • SciCode63.1%#3
  • CritPt29.7%#15
  • Terminal-Bench-Science43.3%#6
  • FrontierCode49%#3
  • AA-AnalystAgent57.5%#1
  • Harvey LAB-AA6.4%#6
  • AA-3D1,135#5
  • ITBench-AA49.5%#4
  • MLCR-AA15.6%#16
  • PersonalityBench: Expressiveness100#1
  • PersonalityBench: Organization54.3#17
  • PersonalityBench: Transparency97.5#2
  • PersonalityBench: Slop21.3#18
  • PersonalityBench: Informativeness97.5#1
  • PersonalityBench: Warmth97.5#2
  • PersonalityBench: Conviction100#1
  • PersonalityBench: Imagination79.7#6
  • GPQA Diamond93.7%#7
  • τ²-Bench Banking47.2%#6
Claude Fable 5.1 (Max)Median
Data from Artificial Analysis

Cost per task

Cost per task

$ per Intelligence Index task · #24 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 · #18 of 26
  1. 507507MiniMax-M3.1-Flash
  2. 578578Mistral Large 4 Preview
  3. 604604GLM-5.3 (Max)
  4. 628628GPT-6.1 Sol (Max)
  5. 723723Gemini 4 Argon (High)
  6. 736736Claude Fable 5.1 (Max)
  7. 791791Claude Opus 5.5 (Max)
  8. 824824GLM-5.3-Flash
  9. 846846Kimi K3.1 Pro
  10. 901901Grok 4.7 (Xhigh)
Data from Artificial Analysis

Tokens per task

output tokens per task · #20 of 27
  1. 66.8K67KQwen3.8 27B (Xhigh)
  2. 68.7K69KGLM-5.3-Flash
  3. 69.5K70KMistral Large 4 Preview
  4. 71K71KGemini 3.8 Flash (High)
  5. 71.1K71KGLM-5.3 (Max)
  6. 78.1K78KClaude Fable 5.1 (Max)
  7. 78.6K79KMiniMax-M3.1-Flash
  8. 80.6K81KGrok 4.7 (Xhigh)
  9. 89.5K90KDeepSeek V4.1 Flash 1017 (Max)
  10. 107.7K108KQwen3.8 Max (0902)
Data from Artificial Analysis

Speed and price

Speed

tokens per second · #115 of 162
  1. 7878Grok 4.7 (Low)
  2. 7777Ministral 3 14B
  3. 7777Magistral Small 1.2
  4. 7676LongCat 2.0
  5. 7070GLM-5.3-Flash
  6. 7070Claude Fable 5.1 (Max)
  7. 6666GPT-6 Astra (Max)
  8. 6666North Mini Code
  9. 6464Kimi K2.7 Code
  10. 6363Claude Fable 5.1 (Xhigh)
Data from Artificial Analysis

Latency

seconds to first token · #157 of 162
  1. 78.579GPT-6 Luna (Max)
  2. 102.7103GPT-5.6 Terra (Max)
  3. 106.6107GPT-6.1 Sol (Xhigh)
  4. 109.6110Claude Opus 5.5 (Xhigh)
  5. 161.5162GPT-6 Astra (Xhigh)
  6. 180.5181Claude Fable 5.1 (Max)
  7. 236236GPT-6.1 Sol (Max)
  8. 278.3278GPT-6 Astra (Max)
  9. 322.2322Claude Haiku 5.5 (Max)
  10. 371.6372Claude Sonnet 5.5 (Max)
Data from Artificial Analysis

Price

$ per 1M tokens (3:1) · #160 of 169
  1. $88Claude Opus 5.5 (High)
  2. $88Muse Wonder (Max)
  3. $88Claude Opus 5.5 (Medium)
  4. $88Claude Opus 5.5 (Low)
  5. $11.25$11GPT-5.5 Instant (June 2026)
  6. $2020Claude Fable 5.1 (Max)
  7. $2020Claude Fable 5.1 (Xhigh)
  8. $2020GPT-6 Astra (Max)
  9. $2020GPT-6 Astra (Xhigh)
  10. $2020Claude Fable 5.1 (High)
Data from Artificial Analysis

Nearby models

  • Claude Opus 5.5 (Xhigh)Anthropic56
  • Claude Sonnet 5.5 (Max)Anthropic56
  • Muse Wonder Full (Max)Meta55.8
  • Kimi K3.1 ProKimi55.1
  • Claude Opus 5.5 (High)Anthropic53.6
  • Claude Fable 5.1 (Xhigh)Anthropic53.2
  • GPT-6 Astra (Max)OpenAI52.7
  • Gemini 4 Argon (High)Google52.6
Data from Artificial Analysis

Same lab

  • Claude Opus 5.5 (Max)Anthropic57.6
  • 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
Data from Artificial Analysis
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