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Claude Sonnet 3.5

Anthropic

Claude Sonnet 3.5 by Anthropic costs $3.00 per 1M input tokens and $15.00 per 1M output tokens, with a 200K-token context window.

Pricing

Input (per 1M tokens)
$3.00
Output (per 1M tokens)
$15.00
Cached input (per 1M)
$0.30

Specifications

Provider
Anthropic
Context window
200K tokens
Parameters
—
Released
Jun 2024
Open weights
No
Frontier model
No

Benchmarks

SWE-bench Multimodal
12.2

Compare Claude Sonnet 3.5 with…

Claude Sonnet 3.5 vs chatgpt-4o-latest$15.00/1MClaude Sonnet 3.5 vs Kimi K3$15.00/1MClaude Sonnet 3.5 vs GPT-5.4$15.00/1MClaude Sonnet 3.5 vs Claude Sonnet 4$15.00/1MClaude Sonnet 3.5 vs Claude Sonnet 4.5$15.00/1MClaude Sonnet 3.5 vs Claude Sonnet 4.6$15.00/1M

FAQ

How much does Claude Sonnet 3.5 cost?

Claude Sonnet 3.5 is priced at $3.00 per 1M input tokens and $15.00 per 1M output tokens. Output tokens cost more than input.

What is Claude Sonnet 3.5's context window?

Claude Sonnet 3.5 supports a context window of 200K tokens — the maximum prompt plus response length it can handle in a single request.

Is Claude Sonnet 3.5 open weight?

No — Claude Sonnet 3.5 is a closed/proprietary model accessed via API.

Data as of 2026-06-28. Source: models.dev (open). Pricing is per 1M tokens (USD); confirm with the provider before production use.