Anthropic·Claude

Claude Opus 4

The Claude 4 flagship, focused on long-running coding, complex agents, and sustained multi-hour execution.

LegacyReasoningCodingAgentMultimodalWeights not released

MODEL NUMBER045

Specifications

Only published specifications are shown.

Context

200K

Input modalities

Text · Image

Open weights

Status

Legacy

The Claude 4 flagship, focused on long-running coding, complex agents, and sustained multi-hour execution.

PreviousClaude 3.7 Sonnet— · 200K ctx

CurrentClaude Opus 4— · 200K ctx

New capabilities Long-horizon agent Extended thinking

Long-horizon agentCodingExtended thinkingTool use

2025-05-22General release

Claude Opus 4 launched alongside Sonnet 4.

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