tokevenClaudevsGrok
Claude Fable 5.1 vs Grok 4.5
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
Claude Fable 5.1
FlagshipGrok 4.5
FlagshipInput $/MTok
$10.00
$2.00
Output $/MTok
$50.00
$6.00
Cache discount
98% off
85% off
Context
1M
500K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
74
vs
61
Code Review
0
vs
0
Summarization
71
vs
71
Q&A
0
vs
0
Extraction
75
vs
72
Reasoning
92
vs
87
Classification
0
vs
0
Creative Writing
78
vs
74
Claude Fable 5.1
Grok 4.5
Guidance
When to use Claude Fable 5.1 vs Grok 4.5
Choose Claude Fable 5.1 when...
- -You need strong reasoning (confidence 92 vs 87)
- -You need strong creative writing (confidence 78 vs 74)
- -You need strong extraction (confidence 75 vs 72)
- -You need strong code generation (confidence 74 vs 61)
- -You need a larger context window (1M vs 500K)
Choose Grok 4.5 when...
- -Cost matters: 80% cheaper on input tokens
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
Claude Fable 5.1
Grok 4.5
100K tokens
$2.20
$0.32Cheaper
1M tokens
$22.00
$6.40Cheaper
10M tokens
$220.00
$64.00Cheaper
FAQ
When should I use Claude Fable 5.1 instead of Grok 4.5?
Claude Fable 5.1 outperforms Grok 4.5 for Code Generation, Extraction, Reasoning. It costs $10.00/$50.00 per million tokens (input/output).
Is Grok 4.5 cheaper than Claude Fable 5.1?
Yes. Grok 4.5 input costs $2.00/MTok vs $10.00/MTok for Claude Fable 5.1, saving 80% on input.
What are the context window sizes for Claude Fable 5.1 and Grok 4.5?
Claude Fable 5.1 has a 1M token context window. Grok 4.5 has a 500K 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 Grok 4.5 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.