Compare · ModelsLive · 2 picked · head to head
Claude Fable 5 vs Claude Opus 4.8
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Claude Fable 5 wins on 10/10 benchmarks
Claude Fable 5 wins 10 of 10 shared benchmarks. Leads in agentic · arena · knowledge.
Category leads
agentic·Claude Fable 5arena·Claude Fable 5knowledge·Claude Fable 5math·Claude Fable 5reasoning·Claude Fable 5coding·Claude Fable 5
Hype vs Reality
Attention vs performance
Claude Fable 5
#12 by perf·no signal
Claude Opus 4.8
#47 by perf·no signal
Best value
Claude Opus 4.8
1.7x better value than Claude Fable 5
Claude Fable 5
2.5 pts/$
$30.00/M
Claude Opus 4.8
4.1 pts/$
$15.00/M
Vendor risk
Who is behind the model
Anthropic
$380.0B·Tier 1
Anthropic
$380.0B·Tier 1
Head to head
10 benchmarks · 2 models
Claude Fable 5Claude Opus 4.8
APEX-Agents
Claude Fable 5 leads by +2.5
APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments.
Claude Fable 5
45.0
Claude Opus 4.8
42.5
Chatbot Arena Elo · Coding
Claude Fable 5 leads by +111.7
Claude Fable 5
1653.9
Claude Opus 4.8
1542.3
Chatbot Arena Elo · Overall
Claude Fable 5 leads by +29.7
Claude Fable 5
1507.6
Claude Opus 4.8
1477.8
Chess Puzzles
Claude Fable 5 leads by +7.0
Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities.
Claude Fable 5
41.0
Claude Opus 4.8
34.0
FrontierMath-Tier-4-v2-Private
Claude Fable 5 leads by +31.7
Claude Fable 5
87.8
Claude Opus 4.8
56.1
FrontierMath-Tiers-1-3-v2-Private
Claude Fable 5 leads by +7.0
Claude Fable 5
87.0
Claude Opus 4.8
80.0
OTIS Mock AIME 2024-2025
Claude Fable 5 leads by +1.4
OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
Claude Fable 5
99.7
Claude Opus 4.8
98.3
SimpleBench
Claude Fable 5 leads by +20.5
SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking.
Claude Fable 5
78.3
Claude Opus 4.8
57.8
SimpleQA Verified
Claude Fable 5 leads by +28.8
SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information.
Claude Fable 5
68.3
Claude Opus 4.8
39.5
WeirdML
Claude Fable 5 leads by +5.0
WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns.
Claude Fable 5
87.8
Claude Opus 4.8
82.9
Full benchmark table
| Benchmark | Claude Fable 5 | Claude Opus 4.8 |
|---|---|---|
APEX-Agents APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments. | 45.0 | 42.5 |
Chatbot Arena Elo · Coding | 1653.9 | 1542.3 |
Chatbot Arena Elo · Overall | 1507.6 | 1477.8 |
Chess Puzzles Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities. | 41.0 | 34.0 |
FrontierMath-Tier-4-v2-Private | 87.8 | 56.1 |
FrontierMath-Tiers-1-3-v2-Private | 87.0 | 80.0 |
OTIS Mock AIME 2024-2025 OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills. | 99.7 | 98.3 |
SimpleBench SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking. | 78.3 | 57.8 |
SimpleQA Verified SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information. | 68.3 | 39.5 |
WeirdML WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns. | 87.8 | 82.9 |
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 | |
| $5.00 | $25.00 | 1.0M tokens (~500 books) | $100.00 |