AnthropicClaude Sonnet 3 API pricing

Generally available March 4, 2024 source
Deprecated January 21, 2025 source
Retired July 21, 2025 source

Claude Sonnet 3 was retired on July 21, 2025. Its last price was $3.00 per 1M input tokens and $15.00 per 1M output tokens.

Last price

Rates in effect since March 4, 2024 (launch price). Every price links to its source.

Input: $3.00
Output: $15.00
Blended 3:1: $6.00

Claude Sonnet 3 last rates per 1M tokens
Rate	Per 1M tokens
Input	$3.00
Output	$15.00

Launch price

Claude Sonnet 3 launched at this price on March 4, 2024.

Input: $3.00
Output: $15.00
Blended 3:1: $6.00

Every price event

1 verified event, newest first. No price moves. Documented since March 4, 2024.

Launch price · March 4, 2024

Rates from March 4, 2024
Rate Per 1M tokens

Input $3.00
Output $15.00
- Price: Announcement (anthropic.com)
  quote
  Sonnet ... Cost [Input $/million tokens | Output $/million tokens] $3 | $15
- Price: Archived page (docs.anthropic.com, captured March 4, 2024)
  quote
  claude-3-sonnet-20240229 ... Cost (Input / Output per MTok^) ... $3.00 / $15.00
- Date: Announcement (anthropic.com)
  quote
  Published Mar 4, 2024 ... Opus and Sonnet are available to use today in our API

Gaps in this history

None known for input and output. Prompt caching and batch were not offered for Claude 3 Sonnet: the 2024-11 and 2024-12 pricing page captures list only input and output for it, and the 2024-11-05 docs model table marks it 'No' for the Message Batches API.

API ids

claude-3-sonnet-20240229

Checked October 28, 2026.