This is a link post.

About 1.5 hours ago, Anthropic released Claude 3.7 Sonnet, a hybrid reasoning model that interpolates between a normal LM and long chains of thought:

Today, we’re announcing Claude 3.7 Sonnet1, our most intelligent model to date and the first hybrid reasoning model on the market. Claude 3.7 Sonnet can produce near-instant responses or extended, step-by-step thinking that is made visible to the user. API users also have fine-grained control over how long the model can think for.

They call this ability "extended thinking" (from their system card):

Claude 3.7 Sonnet introduces a new feature called "extended thinking" mode. In extended thinking mode, Claude produces a series of tokens which it can use to reason about a problem at length before giving its final answer. Claude was trained to do this via reinforcement learning, and it allows Claude to spend more time on
questions which require [...]

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Outline:

(01:22) Benchmark performance

(02:19) At least its not named Claude 3.5 Sonnet

The original text contained 2 images which were described by AI.

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First published:
February 24th, 2025

Source:
https://www.lesswrong.com/posts/qkfRNcvWz3GqoPaJk/anthropic-releases-claude-3-7-sonnet-with-extended-thinking

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Narrated by TYPE III AUDIO.

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Images from the article:

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“Anthropic releases Claude 3.7 Sonnet with extended thinking mode” by LawrenceC

LessWrong (30+ Karma)