AllocateKimi K3 vs Claude Sonnet 5
On provider list prices, Kimi K3 costs $3 per million input tokens against $3 for Claude Sonnet 5: effectively level. Output is $15 against $15.
Kimi K3
Claude Sonnet 5Specifications and provider list prices from the Allocate catalog, checked 2026-07-21.
What the numbers say
Take 1,000,000 requests a month at 1,200 input and 350 output tokens each. That workload costs $8,850 a month on Kimi K3 and $8,850 on Claude Sonnet 5 at list: a gap of $0.
Choose Kimi K3 for
- Open weights you can fine-tune and own
- Published cached-input pricing ($0.30 per M tokens)
Choose Claude Sonnet 5 for
- Judgment calls with policy context
- Customer-facing writing
- Review and escalation flows
Common questions
Which is cheaper, Kimi K3 or Claude Sonnet 5?
Kimi K3, on this workload shape. At list prices it is $3/$15 per million tokens in and out against $3/$15 for Claude Sonnet 5. Billed on Allocate: $3.21/$16.05 against $3.21/$16.05.
Which has the bigger context window?
They match: both read 1,000,000 tokens (1M) per request.
Can I fine-tune Kimi K3 or Claude Sonnet 5?
Kimi K3 publishes open weights (Not listed) and can be fine-tuned on your own data. Claude Sonnet 5 is a closed model served over API; its weights are not available.
Related comparisons
Run the numbers on your workload
Or don’t choose. On Allocate a route name is the contract: point yours at one model today, swap to the other tomorrow, and compare them on your live traffic with per-token metering.