What is Sonnet 4.6?

Sonnet 4.6 is Anthropic’s most capable Sonnet model yet, delivering a full upgrade across coding, computer use, long-context reasoning, agent planning, knowledge work, and design. It features a 1M token context window in beta and approaches Opus-level intelligence at a price point that makes it practical for far more tasks. Pricing remains the same as Sonnet 4.5, starting at $3/$15 per million tokens, making it the default model for Free and Pro users on claude.ai and Claude Cowork.

Who it's for

• Developers and engineers who need consistent, instruction-following coding assistance that often outperforms even Opus-class models from late 2025.
• Knowledge workers tackling complex, multi-step office tasks like navigating spreadsheets, filling out web forms, and synthesizing information across browser tabs.
• Organizations with legacy software that lacks modern APIs, enabling automation of specialized tools through computer use rather than bespoke connectors.

Key features

Computer use capabilities

Sonnet 4.6 shows a major improvement in computer use skills compared to prior Sonnet models. Early users report human-level capability in tasks like navigating complex spreadsheets or completing multi-step web forms, all coordinated across multiple browser tabs.

1M token context window

The model supports a 1M token context window in beta, allowing it to process and reason over extremely long documents, codebases, or conversation histories without losing coherence.

Broad benchmark improvements

Sonnet 4.6 has improved on benchmarks across the board, approaching Opus-level intelligence. Developers with early access prefer Sonnet 4.6 to its predecessor by a wide margin, and often even to Claude Opus 4.5 from November 2025.

Enhanced safety and alignment

Extensive safety evaluations show Sonnet 4.6 is as safe as, or safer than, other recent Claude models. Safety researchers describe it as having “a broadly warm, honest, prosocial, and at times funny character, very strong safety behaviors, and no signs of major concerns around high-stakes forms of misalignment.”

What stands out

Performance that would have previously required reaching for an Opus-class model is now available with Sonnet 4.6 at a Sonnet price point.

This democratization of high-end AI capability means economically valuable office tasks—from complex spreadsheet navigation to multi-step web form completion—are now accessible to far more users. The model’s steady gains on the OSWorld benchmark for computer use, combined with improved resistance to prompt injection attacks, make it a practical choice for organizations that need reliable automation without custom API integrations.

Worth checking out if…

You need a model that balances near-Opus intelligence with Sonnet-level affordability, especially for coding, computer use, or long-context reasoning tasks. It’s also worth checking out if your organization relies on legacy software that’s difficult to automate through traditional APIs, or if you want a default model that handles everything from agent planning to design work without switching between tiers.