Compare · ModelsLive · 2 picked · head to head
Claude Fable 5 vs Claude Opus 5.5
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Claude Opus 5.5 wins on 15/18 benchmarks
Claude Opus 5.5 wins 15 of 18 shared benchmarks. Leads in agentic · general · coding.
Category leads
speed·Claude Fable 5agentic·Claude Opus 5.5reasoning·Claude Fable 5general·Claude Opus 5.5coding·Claude Opus 5.5math·Claude Opus 5.5knowledge·Claude Opus 5.5
Hype vs Reality
Attention vs performance
Claude Fable 5
#27 by perf·#12 by attention
Claude Opus 5.5
#3 by perf·#9 by attention
Best value
Claude Opus 5.5
3.0x better value than Claude Fable 5
Claude Fable 5
2.3 pts/$
$30.00/M
Claude Opus 5.5
6.9 pts/$
$12.00/M
Vendor risk
Who is behind the model
Anthropic
$965.0B·Tier 1
Anthropic
$965.0B·Tier 1
Head to head
18 benchmarks · 2 models
Claude Fable 5Claude Opus 5.5
Artificial Analysis · Quality Index
Claude Fable 5 leads by +2.2
Claude Fable 5
59.9
Claude Opus 5.5
57.6
APEX-Agents
Claude Opus 5.5 leads by +9.9
APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments.
Claude Fable 5
63.6
Claude Opus 5.5
73.5
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
98.5
Claude Opus 5.5
97.5
ARC-AGI-2
Claude Opus 5.5 leads by +3.3
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
89.2
Claude Opus 5.5
92.5
Dtbench
Claude Opus 5.5 leads by +0.9
Claude Fable 5
97.3
Claude Opus 5.5
98.2
Ebr Bench
Claude Opus 5.5 leads by +31.9
Claude Fable 5
39.5
Claude Opus 5.5
71.4
Frontiercode
Claude Opus 5.5 leads by +1.2
Claude Fable 5
53.5
Claude Opus 5.5
54.6
FrontierMath-Tier-4-v2-Private
Claude Opus 5.5 leads by +4.8
Claude Fable 5
90.2
Claude Opus 5.5
95.0
FrontierMath-Tiers-1-3-v2-Private
Claude Opus 5.5 leads by +4.2
Claude Fable 5
87.0
Claude Opus 5.5
91.2
Frontierswe
Claude Opus 5.5 leads by +15.4
Claude Fable 5
47.0
Claude Opus 5.5
62.3
Furniture Assembly
Claude Opus 5.5 leads by +67.9
Claude Fable 5
8.3
Claude Opus 5.5
76.2
GPQA diamond
Claude Opus 5.5 leads by +6.3
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
81.1
Claude Opus 5.5
87.5
Lmca
Claude Opus 5.5 leads by +8.3
Claude Fable 5
71.9
Claude Opus 5.5
80.3
Mirrorcode
Claude Opus 5.5 leads by +13.5
Claude Fable 5
63.9
Claude Opus 5.5
77.4
Mystery Game Puzzles
Claude Opus 5.5 leads by +20.9
Claude Fable 5
47.1
Claude Opus 5.5
68.0
OTIS Mock AIME 2024-2025
OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
Claude Fable 5
100.0
Claude Opus 5.5
100.0
Proofbench
Claude Opus 5.5 leads by +5.0
Claude Fable 5
95.0
Claude Opus 5.5
100.0
SimpleQA Verified
Claude Opus 5.5 leads by +1.5
SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information.
Claude Fable 5
70.7
Claude Opus 5.5
72.2
Full benchmark table
| Benchmark | Claude Fable 5 | Claude Opus 5.5 |
|---|---|---|
Artificial Analysis · Quality Index | 59.9 | 57.6 |
APEX-Agents APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments. | 63.6 | 73.5 |
ARC-AGI ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization. | 98.5 | 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. | 89.2 | 92.5 |
Dtbench | 97.3 | 98.2 |
Ebr Bench | 39.5 | 71.4 |
Frontiercode | 53.5 | 54.6 |
FrontierMath-Tier-4-v2-Private | 90.2 | 95.0 |
FrontierMath-Tiers-1-3-v2-Private | 87.0 | 91.2 |
Frontierswe | 47.0 | 62.3 |
Furniture Assembly | 8.3 | 76.2 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 81.1 | 87.5 |
Lmca | 71.9 | 80.3 |
Mirrorcode | 63.9 | 77.4 |
Mystery Game Puzzles | 47.1 | 68.0 |
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 | 95.0 | 100.0 |
SimpleQA Verified SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information. | 70.7 | 72.2 |
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 | |
| $4.00 | $20.00 | 1.0M tokens (~500 books) | $80.00 |
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