Compare · ModelsLive · 2 picked · head to head
Claude Fable 5.1 vs Claude Mythos Preview
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Claude Mythos Preview wins on 1/1 benchmarks
Claude Mythos Preview wins 1 of 1 shared benchmarks. Leads in knowledge.
Category leads
knowledge·Claude Mythos Preview
Hype vs Reality
Attention vs performance
Claude Fable 5.1
#16 by perf·#12 by attention
Claude Mythos Preview
#5 by perf·no signal
Best value
Claude Fable 5.1
Claude Fable 5.1
2.4 pts/$
$30.00/M
Claude Mythos Preview
n/a
no price
Vendor risk
Who is behind the model
Anthropic
$965.0B·Tier 1
Anthropic
$965.0B·Tier 1
Head to head
1 benchmark · 2 models
Claude Fable 5.1Claude Mythos Preview
HLE
Claude Mythos Preview leads by +13.0
HLE (Humanity's Last Exam) · a reasoning benchmark designed to be the hardest public evaluation of AI. Questions span mathematics, physics, philosophy, and logic · curated to be at or beyond the frontier of human expert capability. Tested with and without tool augmentation. Claude Opus 4.7 scores 46.9% without tools and 54.7% with tools · making it one of the few benchmarks where the top score is below 60%.
Claude Fable 5.1
43.8
Claude Mythos Preview
56.8
Full benchmark table
| Benchmark | Claude Fable 5.1 | Claude Mythos Preview |
|---|---|---|
HLE HLE (Humanity's Last Exam) · a reasoning benchmark designed to be the hardest public evaluation of AI. Questions span mathematics, physics, philosophy, and logic · curated to be at or beyond the frontier of human expert capability. Tested with and without tool augmentation. Claude Opus 4.7 scores 46.9% without tools and 54.7% with tools · making it one of the few benchmarks where the top score is below 60%. | 43.8 | 56.8 |
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 | |
| — | — | 1.0M tokens (~500 books) | — |
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