# Amp — Opus 4.5: Better, Faster, Often Cheaper

- Company: Amp (ampcode.com)
- Announced: 2025-11-27
- Category: capability-change
- Coverage: not counted
- Announcement: yes
- Group: announcements
- Source: https://ampcode.com/news/opus-4.5
- Record: https://forck.live/items/7782-opus-4-5-better-faster-often-cheaper
- Subject: Amp
- Models affected: Claude Opus 4.5, Gemini 3
- Context window: 200k tokens of context

Amp switched its main model in smart mode to Claude Opus 4.5, replacing Gemini 3. Opus 4.5 is described as more polished, faster, and often cheaper due to fewer token-wasting mistakes and higher cache hit rate. It is limited to a 200k token context window.

## Evidence

Verbatim from https://ampcode.com/news/opus-4.5:

> Claude Opus 4.5 is the new main model in Amp's smart mode, two days after we shipped it for you to try out.

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Record: https://forck.live/items/7782-opus-4-5-better-faster-often-cheaper
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