← All models
A

Claude 3.5 Sonnet

Anthropic

Previous generation Sonnet — high intelligence at moderate cost, widely used in production

Input price$3.00 / 1M tokens
Output price$15.00 / 1M tokens
Context window200k tokens
Last updated2026-04-22

Quick calculator

tokens
tokens
req/day
Per request
$0.0105
Daily
$105.00
Monthly
$3,150.00
per month · 30-day estimate
Yearly
$38,325.00

Tips to reduce cost

  • →Use prompt caching to reuse repeated system prompts
  • →Trim whitespace and reduce verbose instructions
  • →Use a smaller model for classification or routing tasks
  • →Batch async requests to get 50% discount (OpenAI/Anthropic)
  • →Cache identical requests at the application layer

Similar models from Anthropic

Compared at your current token settings

About Claude 3.5 Sonnet

Claude 3.5 Sonnet is a premium large language model from anthropic, priced at $3/1M input tokens and $15/1M output tokens. It is priced above the market average and best suited for production workloads. The 200k context window handles long documents, extended conversations, and large code files comfortably.

For most production workloads, the cost breakdown is dominated by input tokens (system prompts, context, retrieved documents) rather than output. At this price point, Claude 3.5 Sonnet is positioned for use cases where quality justifies the premium over cheaper alternatives.

Claude 3.5 Sonnet supports prompt caching at $0.3/1M — a 90% discount on repeated input tokens. For applications with a fixed system prompt or repeated document context (RAG, chatbots, agents), enabling caching is the single highest-leverage cost optimization available.

Frequently Asked Questions

How much does Claude 3.5 Sonnet cost per 1,000 tokens?
Claude 3.5 Sonnet costs $0.0030 per 1,000 input tokens and $0.0150 per 1,000 output tokens.
What is Claude 3.5 Sonnet's context window?
Claude 3.5 Sonnet supports a context window of 200k tokens, which is suitable for long documents and multi-turn conversations.
How does Claude 3.5 Sonnet compare to GPT-4o on price?
Claude 3.5 Sonnet is priced above the market average on input tokens. At $3/1M input vs $2.50/1M for GPT-4o, the cost difference becomes significant at scale — 10,000 requests/day with 1,000 input tokens each costs $900/month with Claude 3.5 Sonnet vs $750/month with GPT-4o.
Does Claude 3.5 Sonnet support prompt caching?
Yes. Claude 3.5 Sonnet supports prompt caching at $0.3/1M tokens — a 90% discount on repeated input. This is especially effective for RAG pipelines and chatbots with large system prompts that repeat across requests.

Compare Claude 3.5 Sonnet with other models

Claude 3.5 Sonnet vs Grok 3Claude 3.5 Sonnet vs GPT-4oClaude 3.5 Sonnet vs Gemini 3 ProClaude 3.5 Sonnet vs Llama 3.1 405BClaude 3.5 Sonnet vs GPT-4.1Claude 3.5 Sonnet vs Magistral Medium