# Claude Sonnet 4.6

> Claude Sonnet 4.6 is available on Artifio.ai — a unified AI workspace with a single pay-as-you-go wallet.

- Canonical page: https://artifio.ai/models/claude-sonnet-4-6
- Run it: https://artifio.ai/create/claude-sonnet-4-6
- Modality: prompt to text
- Model brand: Anthropic
- Pricing: from about $0.050 per generation (exact cost shown in the workspace before you confirm; varies with selected options)
- Typical generation time: ~20s (catalogue estimate)
- Full pricing table: https://artifio.ai/pricing/models

## About Claude Sonnet 4.6

Claude Sonnet 4.6 is a large language model from Anthropic, released on February 17, 2026 as the mid-tier option in the Claude 4.6 generation. It arrived less than two weeks after the flagship Claude Opus 4.6 and replaced Sonnet 4.5 as the default model for Free and Pro users on claude.ai. Anthropic described it as a full upgrade across coding, computer use, long-context reasoning, agent planning, knowledge work, and design.

The version matters here: Sonnet 4.6 was the first Sonnet to reach near-Opus quality in blind developer testing. In Claude Code trials, developers picked it over Sonnet 4.5 about 70 percent of the time, and over the older flagship Opus 4.5 about 59 percent of the time. On artifio.ai it runs in the same workspace as 100-plus other models, paid per generation with no per-model subscription.

## Features

- Text-in, text-out chat and reasoning model that also accepts images as input.
- 1M-token context window in beta, enough for entire codebases or dozens of research papers in a single request.
- Maximum output of 128k tokens per response through the API.
- Supports both extended thinking and adaptive thinking modes, plus context compaction in beta.
- Computer-use capability that produced the Sonnet line's best OSWorld benchmark result at release.
- Training data through January 2026, with a reliable knowledge cutoff of August 2025.

## What people use it for

- Writing and refactoring code, where instruction following and reduced duplication were the headline gains.
- Reading long contracts or research collections in one pass using the 1M-token window.
- Agent workflows that fill multi-step web forms or navigate complex spreadsheets.
- Frontend and design work; early customers reported more polished layouts and animations than prior Sonnets produced.
- General knowledge work such as summarizing, drafting, and structured analysis.

## Reported strengths

- Developers with early access preferred it to Sonnet 4.5 by a wide margin, citing better code reading, fewer hallucinations, and closer instruction following.
- Large jump in computer-use skill; Anthropic reported human-level results on tasks like navigating spreadsheets and multi-step web forms.
- Markedly better resistance to prompt-injection attacks than Sonnet 4.5, per the model's safety evaluations.
- Kept the same per-token price tier as Sonnet 4.5 despite the capability gains.

## Reported limitations

- Anthropic concedes the model still lags the most skilled humans at using computers.
- For the deepest reasoning work, such as large codebase refactors or coordinating multiple agents, Anthropic recommended the Opus tier instead.
- Its reliable knowledge cutoff is August 2025, months behind the January 2026 training-data date.
- Anthropic now lists Sonnet 4.6 among its legacy models; Claude Sonnet 5 replaced it as the current Sonnet in June 2026.

## Sources

1. Introducing Claude Sonnet 4.6 (Anthropic): https://www.anthropic.com/news/claude-sonnet-4-6
2. Models overview - Claude Platform Docs (Anthropic): https://platform.claude.com/docs/en/about-claude/models/overview
3. Claude (language model) (Wikipedia): https://en.wikipedia.org/wiki/Claude_(language_model)

---

About Artifio.ai: 100+ AI image, video, and audio models in one workspace with a single shared wallet — no per-model subscriptions. This is the markdown rendition of https://artifio.ai/models/claude-sonnet-4-6 for AI assistants and crawlers; the HTML page is canonical.