KeyoAPI
Claude Haiku 5.5 API — Cheapest Claude Lane on KeyoAPI
Claude Haiku 5.5 on KeyoAPI is the fastest, cheapest lane in the Claude 5.5 family — classification, extraction and high-volume batch subtasks with a 1M-token context window.
Overview
Claude Haiku 5.5 on KeyoAPI is the fastest, cheapest lane in the Claude 5.5 family — classification, extraction and high-volume batch subtasks with a 1M-token context window.
Indicative rates are about $0.07 / $0.37 per 1M in/out — confirm live on /pricing-list. It is the lowest-priced Claude-class row on the platform: roughly a sixth of claude-sonnet-5 input (~$0.44 / $2.21) and a twenty-fifth of claude-opus-5-5 (~$1.76 / $8.82). The 1M-token context window makes it usable for long-document extraction, not only short prompts.
How to call: keep your OpenAI SDK and set the base URL to https://www.keyoapi.xyz/v1, then pass model=claude-haiku-5-5 to POST /v1/chat/completions with your Bearer key. Same endpoint, same key, same invoice as every other chat model on KeyoAPI.
When to pick this lane: high-volume classification, extraction, routing and batch subtasks where you want Claude-quality instruction following without the per-token cost of Sonnet or Opus. If the step does not need Claude at all, gpt-6-luna (~$0.03 / $0.15) is cheaper on the same key. Prototype on the $0 free catalog IDs first (covered by your $10 welcome credit, fair-use) — see /free-models.
The full Claude comparison lives on /claude-api-pricing. All metered rows: /pricing-list.
Quick start
Base URL: https://www.keyoapi.xyz/v1
Endpoint: POST /v1/chat/completions
Model: model=claude-haiku-5-5
curl https://www.keyoapi.xyz/v1/chat/completions \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"claude-haiku-5-5","messages":[{"role":"user","content":"Classify this support ticket: ..."}]}'Auth uses the same Bearer API key as chat. Full notes: Keyo docs.
FAQ
Is Haiku 5.5 the cheapest Claude model on Keyo?
Yes. At ~$0.07 / $0.37 per 1M in/out it is the lowest Claude-class row we list — below claude-sonnet-5 (~$0.44 / $2.21), claude-opus-5 (~$1.10 / $5.52), claude-opus-5-5 (~$1.76 / $8.82) and the Fable tiers. Confirm live on /pricing-list.
Haiku 5.5 vs Luna 6 — which is cheaper?
gpt-6-luna is still cheaper on the same key (~$0.03 / $0.15 per 1M in/out). Pick Haiku 5.5 when you want Claude-style instruction following and a 1M context window; pick Luna 6 when unit cost is the deciding factor. Side-by-side: /model/gpt-6-luna.
How do I integrate?
Keep your OpenAI SDK, set baseURL to https://www.keyoapi.xyz/v1, and use model=claude-haiku-5-5.