tokevenClaudevsGPT
Claude Fable 5.1 vs GPT 4o
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
Claude Fable 5.1
FlagshipGPT 4o
Mid-tierInput $/MTok
$10.00
$2.50
Output $/MTok
$50.00
$10.00
Cache discount
98% off
50% off
Context
1,000K
128K
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
GPT 4o
Guidance
When to use Claude Fable 5.1 vs GPT 4o
Choose Claude Fable 5.1 when...
- -You need a larger context window (1,000K vs 128K)
- Similar performance; consider provider preference or ecosystem fit.
Choose GPT 4o when...
- -Cost matters: 75% 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
GPT 4o
100K tokens
$2.20
$0.47Cheaper
1M tokens
$22.00
$4.75Cheaper
10M tokens
$220.00
$47.50Cheaper
FAQ
When should I use Claude Fable 5.1 instead of GPT 4o?
Claude Fable 5.1 and GPT 4o perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is GPT 4o cheaper than Claude Fable 5.1?
Yes. GPT 4o input costs $2.50/MTok vs $10.00/MTok for Claude Fable 5.1, saving 75% on input.
What are the context window sizes for Claude Fable 5.1 and GPT 4o?
Claude Fable 5.1 has a 1,000K token context window. GPT 4o has a 128K 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 GPT 4o 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.