Compare · ModelsLive · 2 picked · head to head
Claude Fable 5.2 vs Claude Sonnet 5.5
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Claude Fable 5.2 wins on 7/9 benchmarks
Claude Fable 5.2 wins 7 of 9 shared benchmarks. Leads in knowledge · math · general.
Category leads
knowledge·Claude Fable 5.2math·Claude Fable 5.2general·Claude Fable 5.2
Hype vs Reality
Attention vs performance
Claude Fable 5.2
#1 by perf·#6 by attention
Claude Sonnet 5.5
#17 by perf·#11 by attention
Best value
Claude Sonnet 5.5
3.4x better value than Claude Fable 5.2
Claude Fable 5.2
3.6 pts/$
$24.00/M
Claude Sonnet 5.5
11.9 pts/$
$6.00/M
Vendor risk
Who is behind the model
Anthropic
$965.0B·Tier 1
Anthropic
$965.0B·Tier 1
Head to head
9 benchmarks · 2 models
Claude Fable 5.2Claude Sonnet 5.5
Chess Puzzles
Claude Fable 5.2 leads by +21.0
Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities.
Claude Fable 5.2
77.9
Claude Sonnet 5.5
56.9
FrontierMath-Tier-4-v2-Private
Claude Fable 5.2 leads by +19.5
Claude Fable 5.2
100.0
Claude Sonnet 5.5
80.5
FrontierMath-Tiers-1-3-v2-Private
Claude Fable 5.2 leads by +6.6
Claude Fable 5.2
100.0
Claude Sonnet 5.5
93.4
Furniture Assembly
Claude Fable 5.2 leads by +21.4
Claude Fable 5.2
85.7
Claude Sonnet 5.5
64.3
GPQA diamond
Claude Sonnet 5.5 leads by +2.4
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
Claude Fable 5.2
95.7
Claude Sonnet 5.5
98.0
Mystery Game Puzzles
Claude Fable 5.2 leads by +27.5
Claude Fable 5.2
89.0
Claude Sonnet 5.5
61.5
OTIS Mock AIME 2024-2025
Claude Sonnet 5.5 leads by +0.3
OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
Claude Fable 5.2
99.7
Claude Sonnet 5.5
100.0
SimpleQA Verified
Claude Fable 5.2 leads by +47.5
SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information.
Claude Fable 5.2
94.0
Claude Sonnet 5.5
46.5
SpireClimb
Claude Fable 5.2 leads by +18.3
Claude Fable 5.2
19.6
Claude Sonnet 5.5
1.3
Full benchmark table
| Benchmark | Claude Fable 5.2 | Claude Sonnet 5.5 |
|---|---|---|
Chess Puzzles Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities. | 77.9 | 56.9 |
FrontierMath-Tier-4-v2-Private | 100.0 | 80.5 |
FrontierMath-Tiers-1-3-v2-Private | 100.0 | 93.4 |
Furniture Assembly | 85.7 | 64.3 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 95.7 | 98.0 |
Mystery Game Puzzles | 89.0 | 61.5 |
OTIS Mock AIME 2024-2025 OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills. | 99.7 | 100.0 |
SimpleQA Verified SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information. | 94.0 | 46.5 |
SpireClimb | 19.6 | 1.3 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $8.00 | $40.00 | 1.0M tokens (~500 books) | $160.00 | |
| $2.00 | $10.00 | 1.0M tokens (~500 books) | $40.00 |
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