tokevenGPTvsMoonshot (Kimi)
GPT 5.5 vs Kimi K2
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
GPT 5.5
FlagshipKimi K2
Mid-tierInput $/MTok
$5.00
$0.95
Output $/MTok
$30.00
$4.00
Cache discount
90% off
83% off
Context
1.1M
256K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
65
vs
0
Code Review
90
vs
0
Summarization
70
vs
0
Q&A
90
vs
0
Extraction
78
vs
0
Reasoning
90
vs
0
Classification
85
vs
0
Creative Writing
73
vs
0
GPT 5.5
Kimi K2
Guidance
When to use GPT 5.5 vs Kimi K2
Choose GPT 5.5 when...
- -You need a larger context window (1.1M vs 256K)
- Similar performance; consider provider preference or ecosystem fit.
Choose Kimi K2 when...
- -Cost matters: 81% cheaper on input tokens
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
GPT 5.5
Kimi K2
100K tokens
$1.25
$0.19Cheaper
1M tokens
$20.50
$1.86Cheaper
10M tokens
$205.00
$18.65Cheaper
FAQ
When should I use GPT 5.5 instead of Kimi K2?
GPT 5.5 and Kimi K2 perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is Kimi K2 cheaper than GPT 5.5?
Yes. Kimi K2 input costs $0.95/MTok vs $5.00/MTok for GPT 5.5, saving 81% on input.
What are the context window sizes for GPT 5.5 and Kimi K2?
GPT 5.5 has a 1.1M 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 5.5 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.