Claude 3.7 Sonnet Release: Extended Thinking and Access

What became available

Anthropic released Claude 3.7 Sonnet with standard and extended-thinking modes, API control over thinking tokens, and access across Claude plans and major cloud platforms. [1]

The same announcement also included Claude Code preview. The model release and product milestone are separately indexed so each appears in its own timeline category. [1]

What the release changed

Atlas interpretation: Indexing the model separately makes its release date discoverable alongside the companion product without treating the product as the whole model history. [1]