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
1,000K
500K
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
Grok 4.5
Guidance
When to use Claude Fable 5.1 vs Grok 4.5
Choose Claude Fable 5.1 when...
- -You need a larger context window (1,000K vs 500K)
- Similar performance; consider provider preference or ecosystem fit.
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 and Grok 4.5 perform similarly across all tracked tasks. Pick based on pricing and provider preference.
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 1,000K 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.