Claud 5.1 is now available

Thoughtful AI for the things you build.

Fast, capable AI models with simple token billing. Chat with Claud models on the web, or integrate them with an OpenAI-compatible API in minutes. Pay only for what you use with transparent token pricing.

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No free tier and no trial: buy a token package or a plan and start. No card, no KYC: just an email address and a crypto payment.

curlPOST /v1/chat/completions

curl https://api.claudkey.com/v1/chat/completions \
  -H "Authorization: Bearer $CLAUD_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claud-5.1",
    "messages": [{"role": "user", "content": "Write a haiku about rivers."}],
    "stream": true
  }'

A model for every job

From lightning-fast classification to deep, multi-step reasoning. All models share one API and one token balance.

Compare all models →

Fast and capablereasoning

Claud 5.1

Our balanced everyday model. Strong reasoning with quick responses, ideal for chat, coding and analysis.

Context: 256K
Output / 1M: $3.00

Advanced reasoningreasoning

Claud Opus

Our most capable model for complex, multi-step work where quality matters most.

Context: 256K
Output / 1M: $9.00

Deep reasoningreasoning

Claud Reason

Extended thinking for hard problems: mathematics, research synthesis and intricate debugging.

Context: 256K
Output / 1M: $3.60

Fast responses

Claud Flash

Lowest latency and cost for high-volume tasks: classification, extraction, summaries and simple chat.

Context: 128K
Output / 1M: $1.75

Transparent token billing

Every request shows exactly how many tokens it used and what it cost. Buy tokens as you go or subscribe for a monthly allowance.

Works with the tools you already use

Standard sk- keys and both OpenAI- and Anthropic-format endpoints. Drop Claud into Cursor, Claude Code, the official SDKs, LangChain or the Vercel AI SDK by changing a base URL.

No KYC, no waiting

Sign up with an email address, top up with Bitcoin, Ethereum, USDT or USDC, and start building in minutes. No identity checks, no card on file, no invoices after the fact.

Secure by default

Hashed API keys, two-factor authentication, audit trails and strict data handling. Your prompts are never used for training.

Web chat included

A calm, focused chat interface for everyday work, with the same models and the same balance as the API.

Developer playground

Try prompts, tune parameters and copy ready-to-run code in curl, JavaScript or Python.

Start building with Claud today

Create an account with just an email address, generate an API key and make your first request in under two minutes. No KYC, no card required.

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