CLAUDE April 1, 2026

Claude Sonnet 4.6 Released

WHAT CHANGED

Anthropic released Claude Sonnet 4.6, the latest in the Claude 4 family, with improved reasoning, faster response times, and better instruction following compared to Sonnet 3.7.

WHY IT MATTERS

Sonnet 4.6 is the sweet spot model — smarter than Haiku, cheaper than Opus. Most production apps should migrate to this as the default.

HOW TO USE IT

Update your model string to claude-sonnet-4-6 in any existing Anthropic API call. No other changes needed.

CLAUDE / TYPESCRIPT

import Anthropic from "@anthropic-ai/sdk";

const anthropic = new Anthropic();

const response = await anthropic.messages.create({
  model: "claude-sonnet-4-6",
  max_tokens: 1024,
  messages: [{ role: "user", content: "Your prompt here" }]
});

console.log(response.content[0].text);

releaseapisonnet

ORIGINAL SOURCE

https://www.anthropic.com/news/claude-sonnet-4-6

VIEW ORIGINAL SOURCE →

Claude Sonnet 4.6 represents a significant step in the Claude 4 family. Benchmark scores show improvements across reasoning, coding, and instruction following. For most production use cases this replaces Sonnet 3.7 with no prompt changes required.

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