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Claude 3.5 Sonnet

Anthropic's late-2024 mid-tier, set the bar on coding, agents, and tool-use through 2025.

Updated

Quick facts

Released
Oct 2024
Context
200K tokens
Output / 1M
$15.00 / 1M tokens
License
Proprietary

About Claude 3.5 Sonnet

Claude 3.5 Sonnet (the October 2024 update) was the most-deployed Anthropic model of 2024 and 2025, powering Cursor, Cline, and a long list of agent products. Still in production for stability-pinned workloads.

Benchmarks

Published scores from Anthropic's model card or independent leaderboards. We do not publish numbers we cannot source, see methodology.

HumanEval
92.0
Python coding pass@1
MMLU
,
Broad academic knowledge
GPQA
,
Graduate-level reasoning
SWE-bench
,
Real software-engineering tasks
  • HumanEval92.0

Capabilities

Strengths

  • Mature and battle-tested
  • Strong code

Tracked weaknesses

  • Superseded by 3.7 / 4.x for new builds

Pricing

Per-million-token rates as published by Anthropic.

TierPriceNotes
Input$3.00 / 1M tokensTokens you send to the model
Output$15.00 / 1M tokensTokens the model generates
Context200K tokensMax combined input + output

Call Claude 3.5 Sonnet from your code

Drop-in snippet for the Anthropic SDK. Set your API key in the environment and run.

typescript
import Anthropic from "@anthropic-ai/sdk";

const client = new Anthropic({
  apiKey: process.env.ANTHROPIC_API_KEY,
});

const message = await client.messages.create({
  model: "claude-3-5-sonnet",
  max_tokens: 1024,
  messages: [
    { role: "user", content: "What's the time complexity of quicksort?" },
  ],
});

console.log(message.content);

Compare Claude 3.5 Sonnet with…

Frequently asked

  • How much does Claude 3.5 Sonnet cost per million tokens?
    Claude 3.5 Sonnet is priced at $3.00 / 1M tokens for input tokens and $15.00 / 1M tokens for output tokens via the official Anthropic API at the time of writing.
  • What is Claude 3.5 Sonnet's context window?
    Claude 3.5 Sonnet supports a context window of 200K tokens.
  • Is Claude 3.5 Sonnet open source?
    No. Claude 3.5 Sonnet is a closed-weight model, you can use it via Anthropic's API but the model weights are not publicly downloadable.
  • When was Claude 3.5 Sonnet released?
    Claude 3.5 Sonnet was released on Oct 22, 2024 by Anthropic.
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