ClaudevsGrok

Claude Fable 5.1 vs Grok Build 0.1

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

Pricing

Side-by-side pricing

Claude Fable 5.1

Flagship

Grok Build 0.1

Fast / Budget
Input $/MTok
$10.00
$1.00
Output $/MTok
$50.00
$2.00
Cache discount
98% off
80% off
Context
1M
256K

Quality

Task confidence comparison

Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
74
vs
54
Code Review
0
vs
0
Summarization
71
vs
63
Q&A
0
vs
0
Extraction
75
vs
71
Reasoning
92
vs
76
Classification
0
vs
0
Creative Writing
78
vs
73
Claude Fable 5.1
Grok Build 0.1

Guidance

When to use Claude Fable 5.1 vs Grok Build 0.1

Choose Claude Fable 5.1 when...

  • -You need strong reasoning (confidence 92 vs 76)
  • -You need strong creative writing (confidence 78 vs 73)
  • -You need strong extraction (confidence 75 vs 71)
  • -You need strong code generation (confidence 74 vs 54)
  • -You need a larger context window (1M vs 256K)

Choose Grok Build 0.1 when...

  • -Cost matters: 90% 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 Build 0.1
100K tokens
$2.20
$0.13Cheaper
1M tokens
$22.00
$2.60Cheaper
10M tokens
$220.00
$26.00Cheaper

FAQ

When should I use Claude Fable 5.1 instead of Grok Build 0.1?

Claude Fable 5.1 outperforms Grok Build 0.1 for Code Generation, Summarization, Extraction. It costs $10.00/$50.00 per million tokens (input/output).

Is Grok Build 0.1 cheaper than Claude Fable 5.1?

Yes. Grok Build 0.1 input costs $1.00/MTok vs $10.00/MTok for Claude Fable 5.1, saving 90% on input.

What are the context window sizes for Claude Fable 5.1 and Grok Build 0.1?

Claude Fable 5.1 has a 1M token context window. Grok Build 0.1 has a 256K token context window.

Track your real costs

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