moonshotai/kimi-k2 vs moonshotai/kimi-k3.1-pro
For 100,000 calls of 2,000 in and 500 out, moonshotai/kimi-k2 is cheaper: $229.00 a month at OpenRouter, against $900.00 for moonshotai/kimi-k3.1-pro at OpenRouter — 3.9× the cost.
Cheapest on each
moonshotai/kimi-k2
$229.00/mo
cheapest, at OpenRouter — $0.57 in, $2.3 out per million
moonshotai/kimi-k3.1-pro
$900.00/mo
cheapest, at OpenRouter — $2 in, $10 out per million
Aligned facts
Same rows on both sides, including the ones we cannot fill.
| Attribute | moonshotai/kimi-k2 | moonshotai/kimi-k3.1-pro |
|---|---|---|
| Context window | 131K | 1M |
| Accepts | Aa | Aa · IMG · VID |
| Sellers | 1 | 1 |
| Cheapest input rate | $0.57 / M | $2 / M |
| Cached input rate | ○ no answer | $0.2 / M |
No quality or benchmark row appears here. We hold no throughput or accuracy measurement for either model, and a cost-per-quality figure built from a lab’s own claim would look authoritative and mean nothing.
Cost for this workload — both models, every seller
100,000 calls a month · 2,000 input and 500 output tokens each. Sellers of both models lead, cheapest combined cost first.
| Seller | moonshotai/kimi-k2 /mo | moonshotai/kimi-k3.1-pro /mo |
|---|---|---|
| OpenRouter | $229.002026-10-27 | $900.002026-10-27 |
Cheapest tier per seller, this workload only. In and output rates, and a cached prefix, are broken out in the cost calculator.