Compare · ModelsLive · 2 picked · head to head
Claude Fable 5.1 vs GPT-5.6 Sol
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Claude Fable 5.1 wins on 16/18 benchmarks
Claude Fable 5.1 wins 16 of 18 shared benchmarks. Leads in agentic · reasoning · general.
Category leads
agentic·Claude Fable 5.1reasoning·Claude Fable 5.1knowledge·GPT-5.6 Solgeneral·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
GPT-5.6 Sol
#30 by perf·#4 by attention
Best value
GPT-5.6 Sol
4.7x better value than Claude Fable 5.1
Claude Fable 5.1
2.4 pts/$
$30.00/M
GPT-5.6 Sol
11.1 pts/$
$6.00/M
Vendor risk
Who is behind the model
Anthropic
$965.0B·Tier 1
OpenAI
$840.0B·Tier 1
Head to head
18 benchmarks · 2 models
Claude Fable 5.1GPT-5.6 Sol
APEX-Agents
Claude Fable 5.1 leads by +17.2
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
GPT-5.6 Sol
51.4
ARC-AGI
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
GPT-5.6 Sol
97.5
ARC-AGI-2
GPT-5.6 Sol leads by +2.5
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
GPT-5.6 Sol
92.5
Chess Puzzles
GPT-5.6 Sol 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 5.1
44.2
GPT-5.6 Sol
62.1
Dtbench
Claude Fable 5.1 leads by +2.7
Claude Fable 5.1
96.0
GPT-5.6 Sol
93.3
Ebr Bench
Claude Fable 5.1 leads by +12.4
Claude Fable 5.1
57.1
GPT-5.6 Sol
44.8
Frontiercode
Claude Fable 5.1 leads by +3.4
Claude Fable 5.1
50.9
GPT-5.6 Sol
47.5
FrontierMath-Tier-4-v2-Private
Claude Fable 5.1 leads by +4.9
Claude Fable 5.1
87.8
GPT-5.6 Sol
82.9
FrontierMath-Tiers-1-3-v2-Private
Claude Fable 5.1 leads by +1.1
Claude Fable 5.1
90.2
GPT-5.6 Sol
89.1
Frontierswe
Claude Fable 5.1 leads by +24.1
Claude Fable 5.1
56.3
GPT-5.6 Sol
32.2
Furniture Assembly
Claude Fable 5.1 leads by +19.0
Claude Fable 5.1
57.1
GPT-5.6 Sol
38.1
Lmca
Claude Fable 5.1 leads by +7.4
Claude Fable 5.1
77.0
GPT-5.6 Sol
69.7
Mirrorcode
Claude Fable 5.1 leads by +53.3
Claude Fable 5.1
73.3
GPT-5.6 Sol
20.0
Mystery Game Puzzles
Claude Fable 5.1
53.7
GPT-5.6 Sol
53.7
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
GPT-5.6 Sol
100.0
Proofbench
Claude Fable 5.1 leads by +17.0
Claude Fable 5.1
100.0
GPT-5.6 Sol
83.0
SimpleQA Verified
Claude Fable 5.1 leads by +1.1
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
GPT-5.6 Sol
69.7
WeirdML
Claude Fable 5.1 leads by +3.5
WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns.
Claude Fable 5.1
92.9
GPT-5.6 Sol
89.4
Full benchmark table
| Benchmark | Claude Fable 5.1 | GPT-5.6 Sol |
|---|---|---|
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 | 51.4 |
ARC-AGI ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization. | 97.5 | 97.5 |
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 | 92.5 |
Chess Puzzles Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities. | 44.2 | 62.1 |
Dtbench | 96.0 | 93.3 |
Ebr Bench | 57.1 | 44.8 |
Frontiercode | 50.9 | 47.5 |
FrontierMath-Tier-4-v2-Private | 87.8 | 82.9 |
FrontierMath-Tiers-1-3-v2-Private | 90.2 | 89.1 |
Frontierswe | 56.3 | 32.2 |
Furniture Assembly | 57.1 | 38.1 |
Lmca | 77.0 | 69.7 |
Mirrorcode | 73.3 | 20.0 |
Mystery Game Puzzles | 53.7 | 53.7 |
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 | 83.0 |
SimpleQA Verified SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information. | 70.8 | 69.7 |
WeirdML WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns. | 92.9 | 89.4 |
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 | |
| $2.00 | $10.00 | 1.1M tokens (~525 books) | $40.00 |