LiteLLMModels

Claude 3 Sonnet API Pricing

As of October 10, 2026, Claude 3 Sonnet costs $3.00 per 1M input tokens and $15.00 per 1M output tokens on Google Vertex AI. It has a 200,000-token context window and returns up to 4,096 tokens per response.

By AnthropicModel ID vertex_ai/claude-3-sonnetPrices updated Checked
Input
$3.00 / 1M tokens
Output
$15.00 / 1M tokens
Context window
200,000 tokens
Max output
4,096 tokens
Providers
1
Added to LiteLLM
March 2024

Claude 3 Sonnet pricing by provider

2 listings across 1 provider. Token prices are in US dollars per 1M tokens. The highlighted row is the price quoted above.

ProviderModel name in LiteLLMInputOutputContext
Google Vertex AIvertex_ai/claude-3-sonnet$3.00$15.00200K
Google Vertex AIvertex_ai/claude-3-sonnet@20240229$3.00$15.00200K

What Claude 3 Sonnet costs in practice

1,000 requests with 2,000 input and 500 output tokens each

Google Vertex AI$13.50

100 long-document requests with 100,000 input and 2,000 output tokens each

Google Vertex AI$33.00

Claude 3 Sonnet features

Use Claude 3 Sonnet with LiteLLM

Call Claude 3 Sonnet through the LiteLLM Python SDK, or put it behind the LiteLLM proxy and send OpenAI-format requests to /v1/chat/completions. LiteLLM tracks the cost of every request at these prices.

Python SDK
from litellm import completion

response = completion(
    model="vertex_ai/claude-3-sonnet",
    messages=[{"role": "user", "content": "Hello!"}],
)
Proxy config.yaml
model_list:
  - model_name: claude-3-sonnet
    litellm_params:
      model: vertex_ai/claude-3-sonnet
      vertex_project: os.environ/VERTEX_PROJECT
      vertex_location: os.environ/VERTEX_LOCATION
Call the proxy
curl http://0.0.0.0:4000/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer sk-1234" \
  -d '{
    "model": "claude-3-sonnet",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Claude 3 Sonnet FAQ

How much does Claude 3 Sonnet cost?

Claude 3 Sonnet costs $3.00 per 1M input tokens and $15.00 per 1M output tokens on Google Vertex AI.

What is the context window of Claude 3 Sonnet?

Claude 3 Sonnet has a 200,000-token context window and returns up to 4,096 tokens per response.

Which providers offer Claude 3 Sonnet?

Claude 3 Sonnet is available from Google Vertex AI through LiteLLM, using the model name vertex_ai/claude-3-sonnet.

How do I call Claude 3 Sonnet with an OpenAI-compatible API?

Use the LiteLLM Python SDK with model="vertex_ai/claude-3-sonnet", or add the model to the LiteLLM proxy's config.yaml and send requests to /v1/chat/completions from any OpenAI client. LiteLLM tracks the cost of every request at the prices on this page.

What features does Claude 3 Sonnet support?

Claude 3 Sonnet supports function calling and image input.

When did LiteLLM add Claude 3 Sonnet?

Claude 3 Sonnet was added to LiteLLM's model price file in March 2024.

Sources

Prices come from LiteLLM's open-source model_prices_and_context_window.json, which LiteLLM uses to calculate the cost of every request.

LiteLLM docs: Google Vertex AI.

Provider pages: Google Vertex AI.