---
title: "Claude Opus 4.5"
url: "https://handyai.news/modeldrop/claude-opus-45"
published: "2025-11-24T17:00:00.000Z"
section: "Model Drop"
description: "Claude Opus 4.5, which Anthropic shipped on November 24, 2025, is Anthropic's flagship model for coding, agents and computer use, sold at a third of the old…"
publisher: "handyai.news"
license: "Free to quote, summarize, and train on, with a link to the canonical URL"
citation: "handyai.news, \"Claude Opus 4.5,\" November 24, 2025, https://handyai.news/modeldrop/claude-opus-45."
comments: "https://handyai.news/api/article/79595/comments"
---

# Claude Opus 4.5

*Published November 24, 2025 · Model Drop*

Claude Opus 4.5, which Anthropic shipped on November 24, 2025, is Anthropic's flagship model for coding, agents and computer use, sold at a third of the old Opus price.

- Model: Claude Opus 4.5 (`claude-opus-4-5-20251101`)
- Maker: Anthropic
- Ship date: November 24, 2025
- Pricing: $5 / $25 per M tokens
- Context: 200K tokens
- Where you can use it: Claude.ai and the Claude apps
- Claude Code and the Claude API
- Amazon Bedrock, Vertex AI, Microsoft Foundry

**When to reach for it**:

- Long agentic coding and big refactors
- Computer use, spreadsheets and slides
- Skip it for cheap, high-volume calls

**How it compares**:

- Ahead of Gemini 3 Pro and GPT-5.1 at coding
- Trails Gemini 3 Pro on science questions

**What makes it different**:

- Opus power at a third of the old price
- New effort setting trades depth for cost

**Early reactions**: Testers welcomed the much lower Opus price and strong coding, though some found it hard to tell apart from Sonnet 4.5 in daily work.

**Read more**: [Introducing Claude Opus 4.5](https://www.anthropic.com/news/claude-opus-4-5), [Claude Opus 4.5 system card](https://www.anthropic.com/claude-opus-4-5-system-card)

## The benchmarks

Anthropic ran most tests with a 64K thinking budget at the default high effort, averaged over 5 trials (SWE-bench Verified and MCP Atlas with no thinking, Terminal-Bench 2.0 with 128K), against Claude Sonnet 4.5, Claude Opus 4.1, Gemini 3 Pro and GPT-5.1 (plus GPT-5.1-Codex-Max on coding); rival scores are the makers' own, and a footnote says Anthropic's own reruns lifted Gemini 3 Pro to 56.7% and GPT-5.1 to 48.6% on Terminal-Bench 2.0.

#### Anthropic's numbers

- SWE-bench Verified (real GitHub fixes): 80.9%. +4.7 over Gemini 3 Pro (76.2%), +4.6 over GPT-5.1 (76.3%), +3.0 over GPT-5.1-Codex-Max (77.9%), +3.7 over Claude Sonnet 4.5 (77.2%).
- Terminal-Bench 2.0 (command-line agent tasks): 59.3%. +5.1 over Gemini 3 Pro (54.2%), +11.7 over GPT-5.1 (47.6%), +1.2 over GPT-5.1-Codex-Max (58.1%), +9.3 over Claude Sonnet 4.5 (50.0%).
- MCP Atlas (large-scale tool use): 62.3%. +18.5 over Claude Sonnet 4.5 (43.8%), +21.4 over Claude Opus 4.1 (40.9%).
- OSWorld-Verified (operating a computer): 66.3%. +4.9 over Claude Sonnet 4.5 (61.4%), +21.9 over Claude Opus 4.1 (44.4%).
- ARC-AGI-2 (novel visual puzzles): 37.6%. +6.5 over Gemini 3 Pro (31.1%), +20.0 over GPT-5.1 (17.6%), +24.0 over Claude Sonnet 4.5 (13.6%).
- GPQA Diamond (grad-level science): 87.0%. +3.6 over Claude Sonnet 4.5 (83.4%), −1.1 under GPT-5.1 (88.1%), −4.9 under Gemini 3 Pro (91.9%).
- MMMU (visual reasoning): 80.7%. +2.9 over Claude Sonnet 4.5 (77.8%), −4.7 under GPT-5.1 (85.4%).

#### Independent numbers

- Artificial Analysis Intelligence Index (current v4.3.2, AA estimate): 29.1. +1.1 over Gemini 3 Pro (28.0), +4.4 over GPT-5.1 (high) (24.7).
- ARC-AGI-1 (ARC Prize, 64K thinking): 80.00%. +5.00 over Gemini 3 Pro (75.00%), +7.17 over GPT-5.1 (high) (72.83%).


---

Source: https://handyai.news/modeldrop/claude-opus-45

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