POST /v1/messages

export ANTHROPIC_BASE_URL="https://llmost.ru/api"
export ANTHROPIC_AUTH_TOKEN="llmost_ВАШ_КЛЮЧ"
export ANTHROPIC_API_KEY=""
export ANTHROPIC_DEFAULT_SONNET_MODEL="~anthropic/claude-sonnet-latest"
export ANTHROPIC_DEFAULT_OPUS_MODEL="~anthropic/claude-opus-latest"
export ANTHROPIC_DEFAULT_HAIKU_MODEL="~anthropic/claude-haiku-latest"

curl https://llmost.ru/api/v1/messages \
  -H "Authorization: Bearer llmost_ВАШ_КЛЮЧ" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "anthropic/claude-sonnet-4.5",
    "max_tokens": 1024,
    "messages": [
      {
        "role": "user",
        "content": "В чём смысл жизни?"
      }
    ]
  }'

from anthropic import Anthropic

client = Anthropic(
    base_url="https://llmost.ru/api",
    api_key="llmost_ВАШ_КЛЮЧ",
)

message = client.messages.create(
    model="anthropic/claude-sonnet-4.5",
    max_tokens=1024,
    messages=[
        {"role": "user", "content": "В чём смысл жизни?"}
    ],
)

print(message.content[0].text)

import Anthropic from '@anthropic-ai/sdk';

const anthropic = new Anthropic({
  baseURL: 'https://llmost.ru/api',
  apiKey: 'llmost_ВАШ_КЛЮЧ',
});

const message = await anthropic.messages.create({
  model: 'anthropic/claude-sonnet-4.5',
  max_tokens: 1024,
  messages: [
    { role: 'user', content: 'В чём смысл жизни?' },
  ],
});

console.log(message.content[0].text);

{
  "id": "msg_01XFDUDYJgAACzvnptvVoYEL",
  "type": "message",
  "role": "assistant",
  "model": "anthropic/claude-sonnet-4.5",
  "content": [
    {
      "type": "text",
      "text": "Смысл жизни — философский вопрос..."
    }
  ],
  "stop_reason": "end_turn",
  "stop_sequence": null,
  "usage": {
    "input_tokens": 15,
    "output_tokens": 120,
    "cache_creation_input_tokens": 0,
    "cache_read_input_tokens": 0,
    "cost": 0.00042,
    "cost_details": {}
  }
}

curl https://llmost.ru/api/v1/messages \
  -H "Authorization: Bearer llmost_ВАШ_КЛЮЧ" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "~anthropic/claude-sonnet-latest",
    "max_tokens": 1024,
    "stream": true,
    "messages": [
      {
        "role": "user",
        "content": "Напиши короткое стихотворение"
      }
    ]
  }'

const stream = await anthropic.messages.stream({
  model: '~anthropic/claude-sonnet-latest',
  max_tokens: 1024,
  messages: [
    { role: 'user', content: 'Напиши короткое стихотворение' },
  ],
});

for await (const event of stream) {
  if (event.type === 'content_block_delta' && event.delta.type === 'text_delta') {
    process.stdout.write(event.delta.text);
  }
}

{
  "type": "error",
  "error": {
    "type": "invalid_request_error",
    "message": "Model 'anthropic/nonexistent' not found"
  }
}