Compare · ModelsLive · 3 picked · head to head
Claude Fable 5 vs Claude Opus 5.5 vs Gemini 3.8 Flash
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Claude Opus 5.5 wins on 22/29 benchmarks
Claude Opus 5.5 wins 22 of 29 shared benchmarks. Leads in speed · agentic · knowledge.
Category leads
speed·Claude Opus 5.5agentic·Claude Opus 5.5reasoning·Claude Fable 5knowledge·Claude Opus 5.5general·Claude Opus 5.5coding·Claude Opus 5.5math·Claude Opus 5.5
Hype vs Reality
Attention vs performance
Claude Fable 5
#26 by perf·#11 by attention
Claude Opus 5.5
#12 by perf·#9 by attention
Gemini 3.8 Flash
#53 by perf·#6 by attention
Best value
Gemini 3.8 Flash
4.3x better value than Claude Opus 5.5
Claude Fable 5
2.3 pts/$
$30.00/M
Claude Opus 5.5
6.2 pts/$
$12.00/M
Gemini 3.8 Flash
26.5 pts/$
$2.25/M
Vendor risk
Who is behind the model
Anthropic
$965.0B·Tier 1
Anthropic
$965.0B·Tier 1
Google DeepMind
$4.27T·Tier 1
Head to head
29 benchmarks · 3 models
Claude Fable 5Claude Opus 5.5Gemini 3.8 Flash
Artificial Analysis · Quality Index
Claude Fable 5 leads by +2.2
Claude Fable 5
59.9
Claude Opus 5.5
57.6
Gemini 3.8 Flash
40.9
APEX-Agents
Claude Opus 5.5 leads by +9.2
APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments.
Claude Fable 5
63.6
Claude Opus 5.5
73.5
Gemini 3.8 Flash
64.3
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
98.5
Claude Opus 5.5
98.5
Gemini 3.8 Flash
98.5
ARC-AGI-2
Claude Opus 5.5 leads by +4.2
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
93.3
Gemini 3.8 Flash
89.2
Chess Puzzles
Claude Opus 5.5 leads by +9.5
Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities.
Claude Fable 5
44.2
Claude Opus 5.5
65.3
Gemini 3.8 Flash
55.8
Dtbench
Claude Opus 5.5 leads by +0.9
Claude Fable 5
97.3
Claude Opus 5.5
98.2
Gemini 3.8 Flash
92.9
Frontiercode
Claude Opus 5.5 leads by +1.2
Claude Fable 5
53.5
Claude Opus 5.5
54.6
Gemini 3.8 Flash
41.2
FrontierMath-Tier-4-v2-Private
Claude Opus 5.5 leads by +4.8
Claude Fable 5
90.2
Claude Opus 5.5
95.0
Gemini 3.8 Flash
21.9
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
Gemini 3.8 Flash
68.4
Frontierswe
Claude Opus 5.5 leads by +15.4
Claude Fable 5
47.0
Claude Opus 5.5
62.3
Gemini 3.8 Flash
19.6
Furniture Assembly
Claude Opus 5.5 leads by +67.9
Claude Fable 5
8.3
Claude Opus 5.5
76.2
Gemini 3.8 Flash
2.4
GPQA diamond
Gemini 3.8 Flash leads by +6.4
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
81.1
Claude Opus 5.5
87.5
Gemini 3.8 Flash
93.9
Lmca
Claude Opus 5.5 leads by +8.3
Claude Fable 5
71.9
Claude Opus 5.5
80.3
Gemini 3.8 Flash
62.2
Mystery Game Puzzles
Claude Opus 5.5 leads by +20.9
Claude Fable 5
47.1
Claude Opus 5.5
68.0
Gemini 3.8 Flash
41.6
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
Gemini 3.8 Flash
98.9
Proofbench
Claude Opus 5.5 leads by +5.0
Claude Fable 5
95.0
Claude Opus 5.5
100.0
Gemini 3.8 Flash
48.0
Remote Labor Index
Claude Opus 5.5 leads by +5.1
Claude Fable 5
16.1
Claude Opus 5.5
21.3
Gemini 3.8 Flash
5.8
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
Gemini 3.8 Flash
69.7
Artificial Analysis · CritPt
Claude Opus 5.5 leads by +13.4
Claude Opus 5.5
31.7
Gemini 3.8 Flash
18.3
Artificial Analysis · GDPval
Claude Opus 5.5 leads by +21.5
Claude Opus 5.5
68.3
Gemini 3.8 Flash
46.8
Artificial Analysis · Humanity's Last Exam
Claude Opus 5.5 leads by +13.6
Claude Opus 5.5
61.4
Gemini 3.8 Flash
47.8
Artificial Analysis · Long Context Reasoning
Claude Opus 5.5 leads by +3.4
Claude Opus 5.5
84.7
Gemini 3.8 Flash
81.3
Artificial Analysis · MMMU Pro
Claude Opus 5.5 leads by +2.1
Claude Opus 5.5
87.7
Gemini 3.8 Flash
85.6
Artificial Analysis · SciCode
Claude Opus 5.5 leads by +10.3
Claude Opus 5.5
66.9
Gemini 3.8 Flash
56.6
Deepswe
Gemini 3.8 Flash leads by +3.9
Claude Fable 5
69.9
Gemini 3.8 Flash
73.8
Ebr Bench
Claude Opus 5.5 leads by +31.9
Claude Fable 5
39.5
Claude Opus 5.5
71.4
Mirrorcode
Claude Opus 5.5 leads by +13.5
Claude Fable 5
63.9
Claude Opus 5.5
77.4
Surface Evolver Bench
Claude Fable 5 leads by +18.1
Claude Fable 5
95.0
Gemini 3.8 Flash
76.9
WeirdML
Claude Fable 5 leads by +7.1
WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns.
Claude Fable 5
91.9
Gemini 3.8 Flash
84.8
Full benchmark table
| Benchmark | Claude Fable 5 | Claude Opus 5.5 | Gemini 3.8 Flash |
|---|---|---|---|
Artificial Analysis · Quality Index | 59.9 | 57.6 | 40.9 |
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 | 64.3 |
ARC-AGI ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization. | 98.5 | 98.5 | 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. | 89.2 | 93.3 | 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 | 65.3 | 55.8 |
Dtbench | 97.3 | 98.2 | 92.9 |
Frontiercode | 53.5 | 54.6 | 41.2 |
FrontierMath-Tier-4-v2-Private | 90.2 | 95.0 | 21.9 |
FrontierMath-Tiers-1-3-v2-Private | 87.0 | 91.2 | 68.4 |
Frontierswe | 47.0 | 62.3 | 19.6 |
Furniture Assembly | 8.3 | 76.2 | 2.4 |
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 | 93.9 |
Lmca | 71.9 | 80.3 | 62.2 |
Mystery Game Puzzles | 47.1 | 68.0 | 41.6 |
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 | 98.9 |
Proofbench | 95.0 | 100.0 | 48.0 |
Remote Labor Index | 16.1 | 21.3 | 5.8 |
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 | 69.7 |
Artificial Analysis · CritPt | — | 31.7 | 18.3 |
Artificial Analysis · GDPval | — | 68.3 | 46.8 |
Artificial Analysis · Humanity's Last Exam | — | 61.4 | 47.8 |
Artificial Analysis · Long Context Reasoning | — | 84.7 | 81.3 |
Artificial Analysis · MMMU Pro | — | 87.7 | 85.6 |
Artificial Analysis · SciCode | — | 66.9 | 56.6 |
Deepswe | 69.9 | — | 73.8 |
Ebr Bench | 39.5 | 71.4 | — |
Mirrorcode | 63.9 | 77.4 | — |
Surface Evolver Bench | 95.0 | — | 76.9 |
WeirdML WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns. | 91.9 | — | 84.8 |
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 | |
| $0.75 | $3.75 | 1.0M tokens (~524 books) | $15.00 |
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