tokevenClaudevsGPT
Claude Fable 5 vs GPT 5.6 Luna
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
Claude Fable 5
FlagshipGPT 5.6 Luna
Fast / BudgetInput $/MTok
$10.00
$0.20
Output $/MTok
$50.00
$1.20
Cache discount
90% off
90% off
Context
1M
922K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
72
vs
62
Code Review
95
vs
68
Summarization
77
vs
57
Q&A
88
vs
85
Extraction
75
vs
74
Reasoning
90
vs
86
Classification
82
vs
91
Creative Writing
72
vs
69
Claude Fable 5
GPT 5.6 Luna
Guidance
When to use Claude Fable 5 vs GPT 5.6 Luna
Choose Claude Fable 5 when...
- -You need strong code review (confidence 95 vs 68)
- -You need strong reasoning (confidence 90 vs 86)
- -You need strong q&a (confidence 88 vs 85)
- -You need strong summarization (confidence 77 vs 57)
- -You need a larger context window (1M vs 922K)
Choose GPT 5.6 Luna when...
- -You need strong classification (confidence 91 vs 82)
- -Cost matters: 98% 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
GPT 5.6 Luna
100K tokens
$2.20
$0.05Cheaper
1M tokens
$22.00
$0.82Cheaper
10M tokens
$220.00
$8.20Cheaper
FAQ
When should I use Claude Fable 5 instead of GPT 5.6 Luna?
Claude Fable 5 outperforms GPT 5.6 Luna for Code Generation, Code Review, Summarization. It costs $10.00/$50.00 per million tokens (input/output).
Is GPT 5.6 Luna cheaper than Claude Fable 5?
Yes. GPT 5.6 Luna input costs $0.20/MTok vs $10.00/MTok for Claude Fable 5, saving 98% on input.
What are the context window sizes for Claude Fable 5 and GPT 5.6 Luna?
Claude Fable 5 has a 1M token context window. GPT 5.6 Luna has a 922K 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 and GPT 5.6 Luna 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.