tokevenClaudevsGemini
Claude Fable 5.1 vs Gemini 3.1 Pro
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
Claude Fable 5.1
FlagshipGemini 3.1 Pro
Mid-tierInput $/MTok
$10.00
$2.00
Output $/MTok
$50.00
$12.00
Cache discount
98% off
90% 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
86
Code Review
0
vs
84
Summarization
0
vs
87
Q&A
0
vs
87
Extraction
0
vs
85
Reasoning
0
vs
90
Classification
0
vs
86
Creative Writing
0
vs
84
Claude Fable 5.1
Gemini 3.1 Pro
Guidance
When to use Claude Fable 5.1 vs Gemini 3.1 Pro
Choose Claude Fable 5.1 when...
- Similar performance; consider provider preference or ecosystem fit.
Choose Gemini 3.1 Pro 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
Gemini 3.1 Pro
100K tokens
$2.20
$0.50Cheaper
1M tokens
$22.00
$8.20Cheaper
10M tokens
$220.00
$82.00Cheaper
FAQ
When should I use Claude Fable 5.1 instead of Gemini 3.1 Pro?
Claude Fable 5.1 and Gemini 3.1 Pro perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is Gemini 3.1 Pro cheaper than Claude Fable 5.1?
Yes. Gemini 3.1 Pro 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 Gemini 3.1 Pro?
Claude Fable 5.1 has a 1,000K token context window. Gemini 3.1 Pro has a 1,000K 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 Gemini 3.1 Pro 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.