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Claude Fable 5.1 vs Claude Mythos 5
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
Claude Fable 5.1
FlagshipClaude Mythos 5
FlagshipInput $/MTok
$10.00
$10.00
Output $/MTok
$50.00
$50.00
Cache discount
98% off
90% off
Context
1,000K
1,000K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
0
vs
0
Code Review
0
vs
0
Summarization
0
vs
0
Q&A
0
vs
0
Extraction
0
vs
0
Reasoning
0
vs
0
Classification
0
vs
0
Creative Writing
0
vs
0
Claude Fable 5.1
Claude Mythos 5
Guidance
When to use Claude Fable 5.1 vs Claude Mythos 5
Choose Claude Fable 5.1 when...
- Similar performance; consider provider preference or ecosystem fit.
Choose Claude Mythos 5 when...
- Similar performance; consider provider preference or ecosystem fit.
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
Claude Fable 5.1
Claude Mythos 5
100K tokens
$2.20
$2.20
1M tokens
$22.00
$22.00
10M tokens
$220.00
$220.00
FAQ
When should I use Claude Fable 5.1 instead of Claude Mythos 5?
Claude Fable 5.1 and Claude Mythos 5 perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is Claude Mythos 5 cheaper than Claude Fable 5.1?
Both models have the same input pricing at $10.00/MTok. Compare output pricing: $50.00 vs $50.00/MTok.
What are the context window sizes for Claude Fable 5.1 and Claude Mythos 5?
Claude Fable 5.1 has a 1,000K token context window. Claude Mythos 5 has a 1,000K token context window.
Go deeper on either model
Per-call cost calculators, provider lineups, and price history for both models on this page.
Other comparisons
How Claude Fable 5.1 and Claude Mythos 5 stack up against the rest of the field.
Track your real costs
Comparisons show estimated costs at list price. The dashboard reveals your real spend and savings.