Claude Haiku 5.5 API
Anthropic's chat model. Call it on 666 AI with the same API key as every other model. Pay as you go; prices follow the upstream in real time and this page updates hourly.
| Vendor | Anthropic |
| Type | chat |
| Price | $0.135 per 1M input tokens · $0.675 per 1M output tokens |
| Context window | 200K tokens |
| Live test | Passed our live test in the last 7 days · 3 supply routes, automatic failover |
| Latency (short request) | Median ~2s (5+ calls in the last 7 days) |
| Model ID (use this in your request) | anthropic/claude-haiku-5-5 |
How to call Claude Haiku 5.5
The API is OpenAI-compatible. Replace YOUR-ENDPOINT with the endpoint shown on your API Key page after you sign up, and YOUR-KEY with your key.
curl https://YOUR-ENDPOINT/v1/chat/completions \
-H "Authorization: Bearer YOUR-KEY" \
-H "Content-Type: application/json" \
-d '{"model": "anthropic/claude-haiku-5-5", "messages": [{"role": "user", "content": "Hello"}]}'from openai import OpenAI
client = OpenAI(base_url="https://YOUR-ENDPOINT/v1", api_key="YOUR-KEY")
r = client.chat.completions.create(
model="anthropic/claude-haiku-5-5",
messages=[{"role": "user", "content": "Hello"}],
)
print(r.choices[0].message.content)Similar models — price comparison
| Model | Price |
|---|---|
| Mimo V2.6 Flash | $0.1607 per 1M input tokens · $0.378 per 1M output tokens |
| Mimo V2.5 | $0.2 per 1M input tokens · $0.3999 per 1M output tokens |
| GPT 6 Luna | $0.1215 per 1M input tokens · $0.6075 per 1M output tokens |
| Qwen3.8 Flash | $0.2025 per 1M input tokens · $0.6345 per 1M output tokens |
| Hy3 | $0.189 per 1M input tokens · $0.783 per 1M output tokens |
| Hy3 Preview | $0.243 per 1M input tokens · $0.81 per 1M output tokens |
More models from Anthropic
| Model | Price |
|---|---|
| Claude Fable 5 | $13.5 per 1M input tokens · $67.5 per 1M output tokens |
| Claude Fable 5.1 | $13.5 per 1M input tokens · $67.5 per 1M output tokens |
| Claude Opus 4.5 20251101 | $6.75 per 1M input tokens · $33.75 per 1M output tokens |
| Claude Opus 4.6 | $6.75 per 1M input tokens · $33.75 per 1M output tokens |
| Claude Opus 4.7 | $6.75 per 1M input tokens · $33.75 per 1M output tokens |
| Claude Opus 4.8 | $6.75 per 1M input tokens · $33.75 per 1M output tokens |
| Claude Opus 5 | $6.75 per 1M input tokens · $33.75 per 1M output tokens |
| Claude Opus 5.5 | $5.4 per 1M input tokens · $27 per 1M output tokens |
FAQ
How much does the Claude Haiku 5.5 API cost?
On 666 AI, Claude Haiku 5.5 costs $0.135 per 1M input tokens · $0.675 per 1M output tokens. You pay only for what you use — no monthly fee. Prices follow the upstream in real time; this page updates every hour.
Can I use the official OpenAI SDK?
Yes. The API is OpenAI-compatible: in the OpenAI Python or Node.js SDK just change base_url and api_key, and set model to anthropic/claude-haiku-5-5.
How do I pay?
Bank card (including Google Pay / Apple Pay), USDT / ETH, or bank wire. Top up once and usage is deducted as you go.