Compare · ModelsLive · 2 picked · head to head
Claude Fable 5.2 vs GPT-5.5 Pro
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Claude Fable 5.2 wins on 4/6 benchmarks
Claude Fable 5.2 wins 4 of 6 shared benchmarks. Leads in knowledge · math.
Category leads
knowledge·Claude Fable 5.2math·Claude Fable 5.2
Hype vs Reality
Attention vs performance
Claude Fable 5.2
#1 by perf·#6 by attention
GPT-5.5 Pro
#8 by perf·#9 by attention
Best value
Claude Fable 5.2
4.9x better value than GPT-5.5 Pro
Claude Fable 5.2
3.6 pts/$
$24.00/M
GPT-5.5 Pro
0.7 pts/$
$105.00/M
Vendor risk
Who is behind the model
Anthropic
$965.0B·Tier 1
OpenAI
$840.0B·Tier 1
Head to head
6 benchmarks · 2 models
Claude Fable 5.2GPT-5.5 Pro
Chess Puzzles
Claude Fable 5.2 leads by +17.9
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
GPT-5.5 Pro
60.0
FrontierMath-Tier-4-v2-Private
Claude Fable 5.2 leads by +22.0
Claude Fable 5.2
100.0
GPT-5.5 Pro
78.0
FrontierMath-Tiers-1-3-v2-Private
Claude Fable 5.2 leads by +7.7
Claude Fable 5.2
100.0
GPT-5.5 Pro
92.3
GPQA diamond
GPT-5.5 Pro leads by +0.1
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
GPT-5.5 Pro
95.7
OTIS Mock AIME 2024-2025
GPT-5.5 Pro 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
GPT-5.5 Pro
100.0
SimpleQA Verified
Claude Fable 5.2 leads by +29.5
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
GPT-5.5 Pro
64.5
Full benchmark table
| Benchmark | Claude Fable 5.2 | GPT-5.5 Pro |
|---|---|---|
Chess Puzzles Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities. | 77.9 | 60.0 |
FrontierMath-Tier-4-v2-Private | 100.0 | 78.0 |
FrontierMath-Tiers-1-3-v2-Private | 100.0 | 92.3 |
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 | 95.7 |
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 | 64.5 |
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 | |
| $30.00 | $180.00 | 1.1M tokens (~525 books) | $675.00 |