Claude Sonnet 4.6

Language modelPrevious generationCard summarized

A full upgrade of the model's skills across coding, computer use, long-context reasoning

Active (legacy) · retires not before 17 Feb 2027● Re-checked 12 Oct 2026 · 98 facts · 0 corrections · 3 unconfirmedSource: System Card: Claude Sonnet 4.6 (135 pp)

Use it via API

$1,764 /month

$35.28 per 1K requests

RAG over docs: 12K in · 600 out · 50K requests/mo · 30% cached · change

Code example Compare

Where to call it

Claude APIclaude-sonnet-4-6
Amazon Bedrockanthropic.claude-sonnet-4-6
Google Vertex AIclaude-sonnet-4-6
Microsoft Foundry / Azureclaude-sonnet-4-6

Supports

Image input
PDF input
Structured outputs
Reasoning control
Tool calling
Web search
Prompt caching
Batch API

Full feature support

Good for

Coding and agentic tool use: 79.6% SWE-bench Verified, 59.1% Terminal-Bench 2.0
Computer use: 72.5% OSWorld-Verified, close to Opus 4.6
Knowledge work: highest GDPval-AA Elo (1633) in the card's table

Watch out for

Over-eager actions in GUI computer use
Aggressive pursuit of credentials
Still vulnerable to prompt injection in computer use

Replaced by

Claude Sonnet 5.5$2.00 / $10.00

This model: $3.00 / $15.00 per 1M tokens

Compare side by side

Overview

Anthropic · 10Sonnet

Sonnet 4.6

A full upgrade of the model's skills across coding, computer use, long-context reasoning

Cost: $3.00 in
Context: 1M

Input / output: $3.00 / $15.00
Max output: 128K
Knows up to: August 2025
Released: 17 Feb 2026

Anthropic's Sonnet-class model released after Claude Opus 4.6. It improves substantially over Claude Sonnet 4.5 across coding, agentic, reasoning and computer-use skills, approaches or matches Opus 4.6 on several evaluations, and is deployed under the ASL-3 Standard. p.3

claude-sonnet-4-6

Input / output per 1M: $3.00 / $15.00
Context window: 1M
Max output: 128K
Knows up to: August 2025
Reasoning: Adaptive (extended deprecated)
Weights: Closed

About this card. A model card is the maker's own account of a model: what it's for, how it was trained and tested, and where it falls short. This page condenses Anthropic's System Card: Claude Sonnet 4.6. Every claim carries its source page.