Anthropic·Claude

Claude 3.7 Sonnet

Combined near-instant responses and controllable extended thinking in one model, alongside Claude Code.

LegacyLanguageReasoningCodingAgentMultimodalWeights not released

MODEL NUMBER009

Release date: 2025-02-24
Organization: Anthropic
Family: Claude

Specifications

Only published specifications are shown.

Context

200K

Input modalities

Text · Image

Open weights

Status

Legacy

Overview

Combined near-instant responses and controllable extended thinking in one model, alongside Claude Code.

Why it mattered

It merged the boundary between separate reasoners and general chat models into hybrid reasoning, while bringing coding agents into the main product line.

Changes from predecessor

Compared with Claude 3 Opus ↗

PreviousClaude 3 Opus— · 200K ctx

CurrentClaude 3.7 Sonnet— · 200K ctx

New capabilities Hybrid reasoning Coding Tool use

Architecture & capabilities

Key capabilities

Hybrid reasoningCodingTool use

Release history

2025-02-24General release

Claude 3.7 Sonnet launched as a hybrid-reasoning model.

View source

Related models

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PredecessorClaude 3 OpusView details →SuccessorsClaude Opus 4View details →

Sources

Claude 3.7 Sonnet and Claude CodeAnthropic · 2025-02-24

Official · Verified