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Model comparison

Claude Haiku 5.5 vs Kimi K3

Claude Haiku 5.5 (Anthropic) and Kimi K3 (Moonshot) side by side: what each costs per million tokens through Rapid Router, how much context each takes, what each supports, and where independent benchmarks place them. Same API, same key; switching is a one-string change.

Claude Haiku 5.5Kimi K3
Input price per 1M$0.100$0.304
Output price per 1M$0.500$11.94
Context window1M tokens1M tokens
Max output128K tokens131K tokens
Input typestext, image, pdftext, image, video
Capabilitiestools, JSON, vision, reasoningtools, JSON, vision, reasoning
AuthorAnthropicMoonshot

What a month costs on each

WorkloadClaude Haiku 5.5Kimi K3
Chatbot month (15M in, 4M out)$3.50$52.30
RAG month (40M in, 3M out)$5.50$47.97
Coding month (60M in, 10M out)$11.00$137.60

On a typical 75/25 input-output mix, Claude Haiku 5.5 costs less (about 94% less than Kimi K3). Kimi K3 takes the longer prompt at 1M tokens. Try your own numbers in the cost calculator.

Call either one

curl https://rapidrouter.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $RAPIDROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "anthropic/claude-haiku-5-5", "messages": [{"role": "user", "content": "Hello"}]}'

# the other one: change the model string
  -d '{"model": "moonshotai/kimi-k3", ...}'

Common questions

Which is cheaper, Claude Haiku 5.5 or Kimi K3?

Claude Haiku 5.5 is cheaper on a typical mix of 75% input and 25% output tokens, by about 94%. Through Rapid Router both are billed at the provider list price per million tokens.

Which has the larger context window?

Kimi K3, at 1M tokens. Claude Haiku 5.5 offers 1M tokens.

Can I switch between Claude Haiku 5.5 and Kimi K3 without changing code?

Yes. Both are callable at https://rapidrouter.ai/api/v1 with the same OpenAI-compatible request; only the model string changes (anthropic/claude-haiku-5-5 or moonshotai/kimi-k3).

How do I pay for Claude Haiku 5.5 or Kimi K3?

Top up a Rapid Router balance by card in US dollars, and both models debit that balance per request.

More Claude models: Anthropic API pricing · More Kimi: Moonshot API pricing