ClaudevsClaude

Claude Fable 5.1 vs Claude Mythos 5.1

Side-by-side comparison of pricing, task quality, and projected cost at higher scale.

Pricing

Side-by-side pricing

Claude Fable 5.1

Flagship

Claude Mythos 5.1

Flagship
Input $/MTok
$10.00
$10.00
Output $/MTok
$50.00
$50.00
Cache discount
98% off
98% 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 5.1

Guidance

When to use Claude Fable 5.1 vs Claude Mythos 5.1

Choose Claude Fable 5.1 when...

  • Similar performance; consider provider preference or ecosystem fit.

Choose Claude Mythos 5.1 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 5.1
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 5.1?

Claude Fable 5.1 and Claude Mythos 5.1 perform similarly across all tracked tasks. Pick based on pricing and provider preference.

Is Claude Mythos 5.1 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 5.1?

Claude Fable 5.1 has a 1,000K token context window. Claude Mythos 5.1 has a 1,000K token context window.

Track your real costs

Comparisons show estimated costs at list price. The dashboard reveals your real spend and savings.