tokevenGPTvsMoonshot (Kimi)
GPT 5 Nano vs Kimi K2
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
GPT 5 Nano
Fast / BudgetKimi K2
Mid-tierInput $/MTok
$0.05
$0.95
Output $/MTok
$0.40
$4.00
Cache discount
90% off
83% off
Context
272K
256K
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
GPT 5 Nano
Kimi K2
Guidance
When to use GPT 5 Nano vs Kimi K2
Choose GPT 5 Nano when...
- -Cost matters: 95% cheaper on input tokens
- -You need a larger context window (272K vs 256K)
Choose Kimi K2 when...
- Similar performance; consider provider preference or ecosystem fit.
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
GPT 5 Nano
Kimi K2
100K tokens
$0.02Cheaper
$0.19
1M tokens
$0.15Cheaper
$1.86
10M tokens
$1.55Cheaper
$18.65
FAQ
When should I use GPT 5 Nano instead of Kimi K2?
GPT 5 Nano and Kimi K2 perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is Kimi K2 cheaper than GPT 5 Nano?
Kimi K2 input costs $0.95/MTok, which is 1800% more than GPT 5 Nano at $0.05/MTok.
What are the context window sizes for GPT 5 Nano and Kimi K2?
GPT 5 Nano has a 272K token context window. Kimi K2 has a 256K 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 GPT 5 Nano and Kimi K2 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.