Claude Sonnet 5

The Claude 5 workhorse: near-flagship quality at mid-tier pricing.

Introductory pricing through Aug 31, 2026; $3 input / $15 output per MTok from Sep 1, 2026.

API model ID	`claude-sonnet-5`
Context window	1M tokens
Max output	128K tokens
Input price	$2 per million tokens
Output price	$10 per million tokens
Knowledge cutoff	Jan 2026
Released	Jun 30, 2026
Tokenizer generation	New (Opus 4.7+)
Status	Active

From the announcement

The most agentic Sonnet yet, close to Opus 4.8 at lower prices.
Became the default model on Free and Pro.
Launched at $2 input / $10 output per MTok introductory pricing.

Read Anthropic's announcement

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Other models

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