Question 1

What is Sonnet 4.6?

Accepted Answer

Sonnet 4.6 is Anthropic's latest mid-tier Claude model, released on February 17, 2026. It delivers major upgrades in coding, computer use, long-context reasoning, and agentic planning, approaching Opus-level performance at Sonnet pricing.

Question 2

How does Sonnet 4.6 compare to Opus 4.6?

Accepted Answer

On many real-world office tasks and coding benchmarks, Sonnet 4.6 matches or outperforms Opus 4.6 while costing approximately one-fifth the price, at $3 per million input tokens and $15 per million output tokens.

Question 3

What is the context window for Sonnet 4.6?

Accepted Answer

Sonnet 4.6 supports a 1 million token context window in beta, allowing teams to process large codebases, research documents, and lengthy contracts within a single request.

Question 4

Where can I access Sonnet 4.6?

Accepted Answer

Sonnet 4.6 is available via the Anthropic API using the model string claude-sonnet-4-6, as well as on Amazon Bedrock, Google Cloud Vertex AI, Claude Code, and claude.ai plans.

Question 5

Is Sonnet 4.6 safer than previous models?

Accepted Answer

Anthropic's evaluations indicate Sonnet 4.6 is as safe as or safer than recent Claude models, with improved resistance to prompt injection attacks compared to Sonnet 4.5.

What's New with Sonnet 4.6—Anthropic's Smartest Mid-Tier Model

What's New with Sonnet 4.6—Anthropic's Smartest Mid-Tier Model

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