Compare · ModelsLive · 2 picked · head to head
Claude Fable 5.1 vs Claude Fable 5
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Claude Fable 5.1 wins on 15/20 benchmarks
Claude Fable 5.1 wins 15 of 20 shared benchmarks. Leads in agentic · knowledge · general.
Category leads
speed·Claude Fable 5agentic·Claude Fable 5.1reasoning·Claude Fable 5knowledge·Claude Fable 5.1general·Claude Fable 5.1coding·Claude Fable 5.1math·Claude Fable 5.1
Hype vs Reality
Attention vs performance
Claude Fable 5.1
#16 by perf·#12 by attention
Claude Fable 5
#27 by perf·#12 by attention
Best value
Claude Fable 5.1
1.0x better value than Claude Fable 5
Claude Fable 5.1
2.4 pts/$
$30.00/M
Claude Fable 5
2.3 pts/$
$30.00/M
Vendor risk
Who is behind the model
Anthropic
$965.0B·Tier 1
Anthropic
$965.0B·Tier 1
Head to head
20 benchmarks · 2 models
Claude Fable 5.1Claude Fable 5
Artificial Analysis · Quality Index
Claude Fable 5 leads by +6.5
Claude Fable 5.1
53.4
Claude Fable 5
59.9
APEX-Agents
Claude Fable 5.1 leads by +5.0
APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments.
Claude Fable 5.1
68.6
Claude Fable 5
63.6
ARC-AGI
Claude Fable 5 leads by +1.0
ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization.
Claude Fable 5.1
97.5
Claude Fable 5
98.5
ARC-AGI-2
Claude Fable 5.1 leads by +0.8
ARC-AGI-2 · the second iteration of the Abstraction and Reasoning Corpus, testing novel pattern recognition and abstract reasoning without prior training data.
Claude Fable 5.1
90.0
Claude Fable 5
89.2
Chess Puzzles
Claude Fable 5.1 leads by +6.3
Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities.
Claude Fable 5.1
44.2
Claude Fable 5
37.9
Dtbench
Claude Fable 5 leads by +1.3
Claude Fable 5.1
96.0
Claude Fable 5
97.3
Ebr Bench
Claude Fable 5.1 leads by +17.6
Claude Fable 5.1
57.1
Claude Fable 5
39.5
Frontiercode
Claude Fable 5 leads by +2.6
Claude Fable 5.1
50.9
Claude Fable 5
53.5
FrontierMath-Tier-4-v2-Private
Claude Fable 5 leads by +2.4
Claude Fable 5.1
87.8
Claude Fable 5
90.2
FrontierMath-Tiers-1-3-v2-Private
Claude Fable 5.1 leads by +3.2
Claude Fable 5.1
90.2
Claude Fable 5
87.0
Frontierswe
Claude Fable 5.1 leads by +9.3
Claude Fable 5.1
56.3
Claude Fable 5
47.0
Furniture Assembly
Claude Fable 5.1 leads by +48.8
Claude Fable 5.1
57.1
Claude Fable 5
8.3
Lmca
Claude Fable 5.1 leads by +5.1
Claude Fable 5.1
77.0
Claude Fable 5
71.9
Mirrorcode
Claude Fable 5.1 leads by +9.4
Claude Fable 5.1
73.3
Claude Fable 5
63.9
Mystery Game Puzzles
Claude Fable 5.1 leads by +6.6
Claude Fable 5.1
53.7
Claude Fable 5
47.1
OTIS Mock AIME 2024-2025
OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
Claude Fable 5.1
100.0
Claude Fable 5
100.0
Proofbench
Claude Fable 5.1 leads by +5.0
Claude Fable 5.1
100.0
Claude Fable 5
95.0
Remote Labor Index
Claude Fable 5.1 leads by +1.8
Claude Fable 5.1
17.9
Claude Fable 5
16.1
SimpleQA Verified
Claude Fable 5.1 leads by +0.1
SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information.
Claude Fable 5.1
70.8
Claude Fable 5
70.7
WeirdML
Claude Fable 5.1 leads by +1.0
WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns.
Claude Fable 5.1
92.9
Claude Fable 5
91.9
Full benchmark table
| Benchmark | Claude Fable 5.1 | Claude Fable 5 |
|---|---|---|
Artificial Analysis · Quality Index | 53.4 | 59.9 |
APEX-Agents APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments. | 68.6 | 63.6 |
ARC-AGI ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization. | 97.5 | 98.5 |
ARC-AGI-2 ARC-AGI-2 · the second iteration of the Abstraction and Reasoning Corpus, testing novel pattern recognition and abstract reasoning without prior training data. | 90.0 | 89.2 |
Chess Puzzles Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities. | 44.2 | 37.9 |
Dtbench | 96.0 | 97.3 |
Ebr Bench | 57.1 | 39.5 |
Frontiercode | 50.9 | 53.5 |
FrontierMath-Tier-4-v2-Private | 87.8 | 90.2 |
FrontierMath-Tiers-1-3-v2-Private | 90.2 | 87.0 |
Frontierswe | 56.3 | 47.0 |
Furniture Assembly | 57.1 | 8.3 |
Lmca | 77.0 | 71.9 |
Mirrorcode | 73.3 | 63.9 |
Mystery Game Puzzles | 53.7 | 47.1 |
OTIS Mock AIME 2024-2025 OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills. | 100.0 | 100.0 |
Proofbench | 100.0 | 95.0 |
Remote Labor Index | 17.9 | 16.1 |
SimpleQA Verified SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information. | 70.8 | 70.7 |
WeirdML WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns. | 92.9 | 91.9 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $10.00 | $50.00 | 1.0M tokens (~500 books) | $200.00 | |
| $10.00 | $50.00 | 1.0M tokens (~500 books) | $200.00 |