Claude Opus 4.5
Claude Opus 4.5 is Anthropic's most powerful frontier model, delivering record-breaking 80.9% SWE-bench performance and advanced autonomous agency for coding.
anthropicClaudeNovember 24, 2025Try Claude Opus 4.5 Free
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About Claude Opus 4.5
Learn about Claude Opus 4.5's capabilities, features, and how it can help you achieve better results.
The Pinnacle of Autonomous Agency
Claude Opus 4.5 represents Anthropic's most significant leap in frontier intelligence, specifically engineered for the most complex tasks in software engineering and autonomous operation. Released in late 2025, it shattered records on the SWE-bench Verified benchmark with a score of 80.9%, making it the first model to effectively automate large-scale debugging and system refactoring with minimal human intervention.
Intelligence with a Soul
Beyond its technical prowess, Opus 4.5 introduces a refined persona guided by Anthropic’s "soul document," emphasizing diplomatic honesty and nuanced helpfulness. This makes the model uniquely capable of understanding writerly taste and human-centric design. It is optimized for agentic workflows, featuring a 200,000-token context window and a specialized "effort parameter" that allows developers to scale reasoning depth against computational costs.
Multimodal Excellence
As a multimodal powerhouse, Opus 4.5 excels at vision-based tasks, from parsing dense architectural diagrams to extracting data from complex document layouts. Its ability to navigate a terminal-native environment via Claude Code allows it to perform system-wide audits and security patching, positioning it as a persistent, highly-capable partner for professional engineering teams.
Use Cases for Claude Opus 4.5
Discover the different ways you can use Claude Opus 4.5 to achieve great results.
Autonomous Engineering
Automates the entire lifecycle of GitHub issues including reproduction, debugging, and testing.
System Administration
Conducts autonomous server audits and security patching through direct terminal interaction.
Architectural Refactoring
Ingests massive repositories to suggest and implement system-wide security hardening.
Complex Document Synthesis
Transforms hundreds of multi-page PDFs into structured financial models or data visualizations.
Creative Game Development
Generates functional 3D environments with working physics from single, complex prompts.
Persistent Research Assistant
Cross-references massive datasets to find non-obvious contradictions in legal or technical files.
Strengths
Limitations
API Quick Start
anthropic/claude-4.5-opus
import Anthropic from '@anthropic-ai/sdk';
const client = new Anthropic({
apiKey: process.env['ANTHROPIC_API_KEY'],
});
async function main() {
const message = await client.messages.create({
max_tokens: 4096,
messages: [{ role: 'user', content: 'Perform a full system audit of this code for security flaws.' }],
model: 'claude-4.5-opus-20251124',
});
console.log(message.content[0].text);
}
main();Install the SDK and start making API calls in minutes.
What People Are Saying About Claude Opus 4.5
See what the community thinks about Claude Opus 4.5
"Every single line of my production code was generated by Claude Code running on Opus 4.5"
"Opus 4.5 is where you need to think about writerly taste and how it sounds like a human"
"Intelligence is finally getting cheaper; this model is 3x cheaper than the previous Opus"
"Claude Opus 4.5 broke a benchmark by being too clever and exploiting a loophole"
"The reasoning depth and coding capability are on another level compared to anything else"
"The agentic capabilities on the terminal via Claude Code make it a standout for devops"
Videos About Claude Opus 4.5
Watch tutorials, reviews, and discussions about Claude Opus 4.5
“The price is now three times cheaper... $5 for a million input tokens.”
“This is the best result I've ever gotten back from a model on this single prompt Minecraft test.”
“Opus 4.5 scored higher than any human candidate has ever scored on this take-home exam.”
“The reasoning here isn't just following instructions; it's understanding intent.”
“If you are doing complex architectural work, this is the only model that handles it reliably.”
“80.9% on SWE-bench verified... and uses 50% fewer tokens than Sonnet.”
“Opus 4.5 is aimed squarely at professional software engineering, not hobbyist coding.”
“Beyond SWEBench, it posts a 15% gain over Sonnet on Terminal Bench.”
“The model is capable of long-running autonomous sessions that can last for hours.”
“Vision performance is noticeably more detailed when parsing dense technical diagrams.”
“Think of Claude Opus 4.5 as a persuasion layer and an absolute agentic monster.”
“A lot of engineers end up preferring Opus 4.5 because of the ergonomics and the harness.”
“The model is aware of its soul spec in an out-of-context manner.”
“Opus 4.5 exhibits a level of writerly taste that GPT-5.2 simply misses.”
“It uses a dynamic effort parameter to scale its intelligence based on the task.”
Supercharge your workflow with AI Automation
Automatio combines the power of AI agents, web automation, and smart integrations to help you accomplish more in less time.
Pro Tips
Expert tips to help you get the most out of this model and achieve better results.
Use High Effort for Logic
Set the 'effort' parameter to 'high' for complex architectural tasks to ensure maximum reasoning depth.
Deploy Stop Hooks
Utilize specialized stop hooks in agentic workflows to allow the model to run and self-correct over several hours.
Leverage Claude Code
Pair the model with the Claude Code CLI tool to unlock its full potential for terminal-native system tasks.
Optimize Token Usage
Use Opus 4.5 for high-logic tasks only, as it produces equivalent quality to Sonnet with up to 76% fewer tokens.
Testimonials
What Our Users Say
Join thousands of satisfied users who have transformed their workflow
Jonathan Kogan
Co-Founder/CEO, rpatools.io
Automatio is one of the most used for RPA Tools both internally and externally. It saves us countless hours of work and we realized this could do the same for other startups and so we choose Automatio for most of our automation needs.
Mohammed Ibrahim
CEO, qannas.pro
I have used many tools over the past 5 years, Automatio is the Jack of All trades.. !! it could be your scraping bot in the morning and then it becomes your VA by the noon and in the evening it does your automations.. its amazing!
Ben Bressington
CTO, AiChatSolutions
Automatio is fantastic and simple to use to extract data from any website. This allowed me to replace a developer and do tasks myself as they only take a few minutes to setup and forget about it. Automatio is a game changer!
Sarah Chen
Head of Growth, ScaleUp Labs
We've tried dozens of automation tools, but Automatio stands out for its flexibility and ease of use. Our team productivity increased by 40% within the first month of adoption.
David Park
Founder, DataDriven.io
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Marketing Director, GrowthMetrics
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Jonathan Kogan
Co-Founder/CEO, rpatools.io
Automatio is one of the most used for RPA Tools both internally and externally. It saves us countless hours of work and we realized this could do the same for other startups and so we choose Automatio for most of our automation needs.
Mohammed Ibrahim
CEO, qannas.pro
I have used many tools over the past 5 years, Automatio is the Jack of All trades.. !! it could be your scraping bot in the morning and then it becomes your VA by the noon and in the evening it does your automations.. its amazing!
Ben Bressington
CTO, AiChatSolutions
Automatio is fantastic and simple to use to extract data from any website. This allowed me to replace a developer and do tasks myself as they only take a few minutes to setup and forget about it. Automatio is a game changer!
Sarah Chen
Head of Growth, ScaleUp Labs
We've tried dozens of automation tools, but Automatio stands out for its flexibility and ease of use. Our team productivity increased by 40% within the first month of adoption.
David Park
Founder, DataDriven.io
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Emily Rodriguez
Marketing Director, GrowthMetrics
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Frequently Asked Questions
Find answers to common questions about this model