Kimi K3 vs Claude Sonnet 5.5
Claude Sonnet 5.5 costs less on output ($3.00 against $4.50 per million tokens); Kimi K3 costs less on input ($0.90 against $1.20). Both on one key at UplinkSwitch, each next to its developer's list price.
Prices · per million tokens, USD
| Tokens | Kimi K3kimi-k3 | Claude Sonnet 5.5claude-sonnet-5-5 |
|---|---|---|
| Input | $0.90Moonshot AI lists $3.00 · 70% under | $1.20Anthropic lists $2.00 · 40% under |
| Cached input | $0.09Moonshot AI lists $0.30 · 70% under | $0.075Anthropic lists $0.10 · 25% under |
| Output | $4.50Moonshot AI lists $15.00 · 70% under | $3.00Anthropic lists $10.00 · 70% under |
| Formats | OpenAI SDK | Anthropic SDK, OpenAI SDK |
| Developer | Moonshot AI | Anthropic |
List price: each developer's published rate, read October 2026. A model with no cached rate bills cached tokens at its input rate. Live from GET https://api.uplinkswitch.com/v1/catalog.
Same key, same URL
One base URL and one key serve both models. The request below calls Kimi K3; put claude-sonnet-5-5 in the model field to call Claude Sonnet 5.5 instead.
shell
curl https://api.uplinkswitch.com/v1/chat/completions \
-H "authorization: Bearer sk-uplink-live-..." \
-H "content-type: application/json" \
-d '{"model":"kimi-k3","messages":[{"role":"user","content":"Hello"}]}'Model pages: Kimi K3, Claude Sonnet 5.5. Pricing by family: Kimi, Claude. More comparisons: MiniMax M2.7 vs Kimi K3, Kimi K3 vs GPT-6.1 Sol, GLM 5.3 vs Kimi K3, Claude Sonnet 5.5 vs GPT-6.1 Sol.
Questions
- Which costs less, Kimi K3 or Claude Sonnet 5.5?
- Claude Sonnet 5.5 costs less on output ($3.00 against $4.50 per million tokens); Kimi K3 costs less on input ($0.90 against $1.20).
- Can I switch between them by changing the model id?
- Yes. Both answer in the OpenAI SDK format at the same base URL with the same key. Change the model id from kimi-k3 to claude-sonnet-5-5 and nothing else.
- Is there a subscription?
- No. Prepaid credit from $10, with no subscription or monthly fee. Each top-up locks your prices for 30 days.