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
$1.00
Output $/MTok
$50.00
$6.00
Cache discount
90% 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
96
vs
70
Code Review
95
vs
68
Summarization
90
vs
84
Q&A
88
vs
85
Extraction
85
vs
89
Reasoning
98
vs
63
Classification
82
vs
91
Creative Writing
95
vs
58
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 reasoning (confidence 98 vs 63)
- -You need strong code generation (confidence 96 vs 70)
- -You need strong code review (confidence 95 vs 68)
- -You need strong creative writing (confidence 95 vs 58)
Choose GPT 5.6 Luna when...
- -You need strong classification (confidence 91 vs 82)
- -You need strong extraction (confidence 89 vs 85)
- -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
GPT 5.6 Luna
100K tokens
$2.20
$0.25Cheaper
1M tokens
$22.00
$2.50Cheaper
10M tokens
$220.00
$25.00Cheaper
FAQ
When should I use Claude Fable 5 instead of GPT 5.6 Luna?
Claude Fable 5 outperforms GPT 5.6 Luna for Reasoning, Code Generation, Code Review. 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 $1.00/MTok vs $10.00/MTok for Claude Fable 5, saving 90% on input.
What are the context window sizes for Claude Fable 5 and GPT 5.6 Luna?
Claude Fable 5 has a 1,000K token context window. GPT 5.6 Luna has a 1,000K token context window.
Track your real costs
Comparisons show estimated costs at list price. The dashboard reveals your real spend and savings.