Kimi K3.1 Pro API free: up to $10 promotional usage
Use the Kimi K3.1 Pro API free with up to $10 in promotional API usage through an independent Anthropic-compatible or OpenAI-compatible gateway. Verify the live catalogue, then connect your application.
Get $5 by connecting Telegram and another $5 by joining the LLMsRelay channel. This free access is promotional usage, not cash or unlimited access.
Open the free usage flow- Model ID
- kimi-k3.1-pro
- Endpoint
- POST /v1/messages, /v1/chat/completions, /v1/responses
- Authentication
- x-api-key or Authorization: Bearer
Availability is key-dependent. Call GET /v1/models after creating a key; the response is the source of truth for your account.
- 1. Create an account, then create an API key of type "Chinese Models" in the dashboard.
- 2. Call GET /v1/models to confirm kimi-k3.1-pro is enabled for that key.
- 3. Send a request to POST /v1/messages, POST /v1/chat/completions, or POST /v1/responses at https://api.llmsrelay.com.
- 4. For Claude Code, set ANTHROPIC_BASE_URL=https://api.llmsrelay.com, ANTHROPIC_AUTH_TOKEN to the key, and ANTHROPIC_MODEL=kimi-k3.1-pro.
# Anthropic-compatible Messages
curl https://api.llmsrelay.com/v1/messages \
-H "x-api-key: YOUR_API_KEY" \
-H "anthropic-version: 2023-06-01" \
-H "content-type: application/json" \
-d '{
"model": "kimi-k3.1-pro",
"max_tokens": 1024,
"messages": [{"role": "user", "content": "Hello"}]
}'
# OpenAI-compatible Chat Completions
curl https://api.llmsrelay.com/v1/chat/completions \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "content-type: application/json" \
-d '{
"model": "kimi-k3.1-pro",
"messages": [{"role": "user", "content": "Hello"}]
}'
# OpenAI Responses
curl https://api.llmsrelay.com/v1/responses \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "content-type: application/json" \
-d '{
"model": "kimi-k3.1-pro",
"input": "Hello"
}'Questions about Kimi K3.1 Pro
Is Kimi K3.1 Pro free to use?
LLMsRelay can provide up to $10 in promotional API usage through the reward flow. This is promotional usage, not cash and not unlimited access. Model availability still depends on the API key.
How do I call Kimi K3.1 Pro?
Create an API key of type "Chinese Models" in the dashboard, then call https://api.llmsrelay.com with model ID kimi-k3.1-pro: POST /v1/messages (Anthropic-compatible), POST /v1/chat/completions (OpenAI-compatible), or POST /v1/responses (OpenAI Responses). Call GET /v1/models first to confirm the model is enabled for that key.
Does Kimi K3.1 Pro work with Claude Code?
Yes. Set ANTHROPIC_BASE_URL=https://api.llmsrelay.com, ANTHROPIC_AUTH_TOKEN to your "Chinese Models" API key, and ANTHROPIC_MODEL=kimi-k3.1-pro.
Which tools and SDKs work?
One "Chinese Models" key answers Anthropic-compatible, OpenAI-compatible, and OpenAI Responses requests, so Anthropic SDKs, OpenAI SDKs, and Claude Code all work after changing the base URL and key.