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Claude Opus 4.5

Claude Opus 4.5 remains suited to demanding coding and agent tasks, but Anthropic marks it Legacy and recommends migrating to Opus 5.

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At a glance

claude-opus-4-5

Pricing

Paid

Access

Login required

Platforms

Web

Chinese support

Yes

Last checked

2026-09-03

Popularity

95/100

Pricing evidence

USD 5 / 1M input tokens输出价格为 $25 / 1M tokens；官方建议新项目迁移至 Claude Opus 5。Open price source

Verification and source

Stale

官方当前将 Claude Opus 4.5 标为 Legacy，并建议迁移至 Claude Opus 5。

Anthropic Claude Opus 4.5 overview

Model background

Closed weights

Claude Opus 4.5 was Anthropic's flagship for demanding knowledge work and agent workflows; the current official page marks it Legacy, so Opus 5 should be compared first for new work.

Why it mattered

Claude Opus 4.5 was Anthropic's flagship for demanding knowledge work and agent workflows; the current official page marks it Legacy, so Opus 5 should be compared first for new work.

Official linkhttps://platform.claude.com/docs/en/models/opus-4-5/overview

Tags

LegacyCodingAgent

Audience

开发者

Update info

Updated 2026-08-29

Popularity 95/100

Model capabilities

Multimodal ✓Reasoning ✓Coding ✓Tool use ✓Long context ✓

Context length

200K tokens

API price

USD 5 / 25 /1M tokens

Provider

anthropic

Typical use

复杂代码任务Long-horizon agentsDeep writing

Citation card

Claude Opus 4.5

Claude Opus 4.5 remains suited to demanding coding and agent tasks, but Anthropic marks it Legacy and recommends migrating to Opus 5.

AI X Tool · https://aixtool.xyz/resources/claude-opus-4-5

Why try it

Good fit

  • 200K 上下文和 64K 最大输出
  • 复杂代码、Agent 和长文写作能力成熟
  • 工具调用能力适合长任务链

Watch outs

  • Legacy 生命周期，后续项目应评估 Opus 5
  • 输入 $5、输出 $25 / 1M tokens，成本较高
  • 不能把旧型号定位为当前旗舰

Not for

  • 希望直接采用 Anthropic 当前旗舰的全新项目
  • 对延迟和成本非常敏感的高并发任务

Change log

Catalog update

2026-08-29

Last verified

2026-09-03

Review note

官方当前将 Claude Opus 4.5 标为 Legacy，并建议迁移至 Claude Opus 5。

FAQ

Claude Opus 4.5 还可以使用吗？

官方页面仍列出该模型，但已经标为 Legacy；接入前应确认账户和 API 的可用性。

Claude Opus 4.5 的上下文和输出上限是多少？

当前官方页面记录为 200K 上下文窗口、64K 最大输出。

新项目应该选 Claude Opus 4.5 还是 Opus 5？

官方建议迁移至 Opus 5；只有在兼容性、回归结果或特定任务验证支持时才保留 4.5。

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