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Claude Sonnet 5 vs Claude Fable 5
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
Claude Sonnet 5
Mid-tierClaude Fable 5
FlagshipInput $/MTok
$2.00
$10.00
Output $/MTok
$10.00
$50.00
Cache discount
90% off
90% off
Context
200K
1,000K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
93
vs
96
Code Review
96
vs
95
Summarization
91
vs
90
Q&A
89
vs
88
Extraction
88
vs
85
Reasoning
90
vs
98
Classification
86
vs
82
Creative Writing
87
vs
95
Claude Sonnet 5
Claude Fable 5
Guidance
When to use Claude Sonnet 5 vs Claude Fable 5
Choose Claude Sonnet 5 when...
- -You need strong code review (confidence 96 vs 95)
- -You need strong summarization (confidence 91 vs 90)
- -You need strong q&a (confidence 89 vs 88)
- -You need strong extraction (confidence 88 vs 85)
- -Cost matters: 80% cheaper on input tokens
Choose Claude Fable 5 when...
- -You need strong reasoning (confidence 98 vs 90)
- -You need strong code generation (confidence 96 vs 93)
- -You need strong creative writing (confidence 95 vs 87)
- -You need a larger context window (1,000K vs 200K)
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
Claude Sonnet 5
Claude Fable 5
100K tokens
$0.44Cheaper
$2.20
1M tokens
$4.40Cheaper
$22.00
10M tokens
$44.00Cheaper
$220.00
FAQ
When should I use Claude Sonnet 5 instead of Claude Fable 5?
Claude Sonnet 5 outperforms Claude Fable 5 for Code Review, Summarization, Q&A. It costs $2.00/$10.00 per million tokens (input/output).
Is Claude Fable 5 cheaper than Claude Sonnet 5?
Claude Fable 5 input costs $10.00/MTok, which is 400% more than Claude Sonnet 5 at $2.00/MTok.
What are the context window sizes for Claude Sonnet 5 and Claude Fable 5?
Claude Sonnet 5 has a 200K token context window. Claude Fable 5 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.