Compare · ModelsLive · 3 picked · head to head
Claude Fable 5.1 vs Claude Opus 5.5 vs Gemini 4 Argon
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Claude Opus 5.5 wins on 20/26 benchmarks
Claude Opus 5.5 wins 20 of 26 shared benchmarks. Leads in speed · knowledge · coding.
Category leads
speed·Claude Opus 5.5agentic·Gemini 4 Argonknowledge·Claude Opus 5.5coding·Claude Opus 5.5math·Claude Opus 5.5general·Claude Opus 5.5reasoning·Claude Opus 5.5
Hype vs Reality
Attention vs performance
Claude Fable 5.1
#24 by perf·#11 by attention
Claude Opus 5.5
#12 by perf·#9 by attention
Gemini 4 Argon
#11 by perf·#1 by attention
Best value
Gemini 4 Argon
2.0x better value than Claude Opus 5.5
Claude Fable 5.1
2.3 pts/$
$30.00/M
Claude Opus 5.5
6.2 pts/$
$12.00/M
Gemini 4 Argon
12.5 pts/$
$6.00/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
26 benchmarks · 3 models
Claude Fable 5.1Claude Opus 5.5Gemini 4 Argon
Artificial Analysis · CritPt
Claude Opus 5.5 leads by +2.0
Claude Fable 5.1
29.7
Claude Opus 5.5
31.7
Gemini 4 Argon
27.1
Artificial Analysis · GDPval
Claude Opus 5.5 leads by +5.6
Claude Fable 5.1
62.7
Claude Opus 5.5
68.3
Gemini 4 Argon
56.2
Artificial Analysis · Humanity's Last Exam
Claude Opus 5.5 leads by +2.3
Claude Fable 5.1
59.1
Claude Opus 5.5
61.4
Gemini 4 Argon
57.1
Artificial Analysis · Long Context Reasoning
Claude Fable 5.1 leads by +0.6
Claude Fable 5.1
85.3
Claude Opus 5.5
84.7
Gemini 4 Argon
79.7
Artificial Analysis · Quality Index
Claude Opus 5.5 leads by +4.3
Claude Fable 5.1
53.4
Claude Opus 5.5
57.6
Gemini 4 Argon
52.6
Artificial Analysis · SciCode
Claude Opus 5.5 leads by +3.8
Claude Fable 5.1
63.1
Claude Opus 5.5
66.9
Gemini 4 Argon
61.8
APEX-Agents
Gemini 4 Argon leads by +8.9
APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments.
Claude Fable 5.1
68.6
Claude Opus 5.5
73.5
Gemini 4 Argon
82.4
Chess Puzzles
Claude Opus 5.5 leads by +8.4
Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities.
Claude Fable 5.1
45.3
Claude Opus 5.5
65.3
Gemini 4 Argon
56.9
Frontiercode
Claude Opus 5.5 leads by +3.7
Claude Fable 5.1
50.9
Claude Opus 5.5
54.6
Gemini 4 Argon
47.5
FrontierMath-Tier-4-v2-Private
Claude Opus 5.5 leads by +7.2
Claude Fable 5.1
87.8
Claude Opus 5.5
95.0
Gemini 4 Argon
78.0
FrontierMath-Tiers-1-3-v2-Private
Claude Opus 5.5 leads by +1.0
Claude Fable 5.1
90.2
Claude Opus 5.5
91.2
Gemini 4 Argon
86.0
Frontierswe
Claude Opus 5.5 leads by +6.0
Claude Fable 5.1
56.3
Claude Opus 5.5
62.3
Gemini 4 Argon
55.0
Furniture Assembly
Claude Opus 5.5 leads by +15.5
Claude Fable 5.1
57.1
Claude Opus 5.5
76.2
Gemini 4 Argon
60.7
Mystery Game Puzzles
Claude Opus 5.5 leads by +7.7
Claude Fable 5.1
53.7
Claude Opus 5.5
68.0
Gemini 4 Argon
60.3
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
Claude Opus 5.5
100.0
Gemini 4 Argon
100.0
Proofbench
Claude Fable 5.1
100.0
Claude Opus 5.5
100.0
Gemini 4 Argon
99.0
SimpleQA Verified
Gemini 4 Argon leads by +3.8
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
Claude Opus 5.5
72.2
Gemini 4 Argon
76.0
ARC-AGI
Claude Opus 5.5 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 5.1
97.5
Claude Opus 5.5
98.5
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 5.1
90.0
Claude Opus 5.5
93.3
Dtbench
Claude Opus 5.5 leads by +2.2
Claude Fable 5.1
96.0
Claude Opus 5.5
98.2
Ebr Bench
Claude Opus 5.5 leads by +14.3
Claude Fable 5.1
57.1
Claude Opus 5.5
71.4
GPQA diamond
Gemini 4 Argon leads by +7.7
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
Claude Opus 5.5
87.5
Gemini 4 Argon
95.2
Lmca
Claude Opus 5.5 leads by +3.3
Claude Fable 5.1
77.0
Claude Opus 5.5
80.3
Mirrorcode
Claude Opus 5.5 leads by +4.1
Claude Fable 5.1
73.3
Claude Opus 5.5
77.4
Remote Labor Index
Claude Opus 5.5 leads by +3.3
Claude Fable 5.1
17.9
Claude Opus 5.5
21.3
SpireClimb
Claude Opus 5.5 leads by +1.3
Claude Fable 5.1
2.0
Claude Opus 5.5
3.3
Full benchmark table
| Benchmark | Claude Fable 5.1 | Claude Opus 5.5 | Gemini 4 Argon |
|---|---|---|---|
Artificial Analysis · CritPt | 29.7 | 31.7 | 27.1 |
Artificial Analysis · GDPval | 62.7 | 68.3 | 56.2 |
Artificial Analysis · Humanity's Last Exam | 59.1 | 61.4 | 57.1 |
Artificial Analysis · Long Context Reasoning | 85.3 | 84.7 | 79.7 |
Artificial Analysis · Quality Index | 53.4 | 57.6 | 52.6 |
Artificial Analysis · SciCode | 63.1 | 66.9 | 61.8 |
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 | 73.5 | 82.4 |
Chess Puzzles Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities. | 45.3 | 65.3 | 56.9 |
Frontiercode | 50.9 | 54.6 | 47.5 |
FrontierMath-Tier-4-v2-Private | 87.8 | 95.0 | 78.0 |
FrontierMath-Tiers-1-3-v2-Private | 90.2 | 91.2 | 86.0 |
Frontierswe | 56.3 | 62.3 | 55.0 |
Furniture Assembly | 57.1 | 76.2 | 60.7 |
Mystery Game Puzzles | 53.7 | 68.0 | 60.3 |
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 | 100.0 |
Proofbench | 100.0 | 100.0 | 99.0 |
SimpleQA Verified SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information. | 70.8 | 72.2 | 76.0 |
ARC-AGI ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization. | 97.5 | 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. | 90.0 | 93.3 | — |
Dtbench | 96.0 | 98.2 | — |
Ebr Bench | 57.1 | 71.4 | — |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | — | 87.5 | 95.2 |
Lmca | 77.0 | 80.3 | — |
Mirrorcode | 73.3 | 77.4 | — |
Remote Labor Index | 17.9 | 21.3 | — |
SpireClimb | 2.0 | 3.3 | — |
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 | |
| $2.00 | $10.00 | 1.0M tokens (~524 books) | $40.00 |