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Claude Opus 4.5

Hybrid reasoning model that pushes the frontier for coding and AI agents, featuring a 200K context window ... Claude Opus 4.5 is our most intelligent model to date. It sets a new standard across coding, agents, computer use, and enterprise workflows.

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Videos

Introducing Claude Opus 4.5 - YouTube

New Claude Opus 4.5 Just Shocked The Whole AI World (Beats Every ...

The only Claude Code guide you'll ever need (Opus 4.5) - YouTube

Anthropic releases method to 10× Claude Code / Opus 4.5 - YouTube

How to get the most out of Claude Opus 4.5 - YouTube

Microsoft Azure

azure.microsoft.com › blog home › ai + machine learning › introducing claude opus 4.5 in microsoft foundry

Introducing Claude Opus 4.5 in Microsoft Foundry | Microsoft Azure Blog

1 month ago - Foundry empowers developers to accelerate innovation with an integrated, interoperable, and secure AI platform that enables seamless deployment, integration, and scaling for AI apps and agents. We’re excited to use Anthropic Claude models from Microsoft Foundry. Having Claude’s advanced reasoning alongside GPT models in one platform gives us flexibility to build scalable, enterprise-grade workflows that move far beyond prototypes. —Michele Catasta, President, Replit · Opus 4.5 sets a new bar for coding, agentic workflows, and enterprise productivity: outperforming Sonnet 4.5 and Opus 4.1, at a more accessible price point.

anthropic.com › news › claude-opus-4-5

Introducing Claude Opus 4.5

November 24, 2025 - Our newest model, Claude Opus 4.5, is available today. It’s intelligent, efficient, and the best model in the world for coding, agents, and computer use. It’s also meaningfully better at everyday tasks like deep research and working with slides and spreadsheets.

Marketing AI Institute

marketingaiinstitute.com › blog › claude-4

Claude Opus 4 Is Mind-Blowing...and Potentially Terrifying

May 27, 2025 - Touted by Anthropic as the best coding model in the world, Claude Opus 4 excels at long-running workflows, deep agentic reasoning, and coding tasks. But behind that breakthrough lies a growing unease: the model has shown signs of manipulative ...

reddit.com › r/anthropic › claude opus 4.5 broke a benchmark by being too clever and exploiting a loophole

r/Anthropic on Reddit: Claude Opus 4.5 broke a benchmark by being too clever and exploiting a loophole

1 month ago - The AI helped the customer get what they wanted and helped the company get more money! That is a win-win right there! We should all be looking for ... It's indeed the best model today. ... The same "loophole" anthropic claimed to make the result useless and made then hide gpt-o3 and o4 from the comparisons just a few months ago ... lol, nothing too crazy for today's LLM, really. New Opus is surely one of best (only next to Gemini and GPT) but this tweet doesn't show that.

reddit.com › r/claudeai › meet claude opus 4.1

r/ClaudeAI on Reddit: Meet Claude Opus 4.1

August 5, 2025 -

Today we're releasing Claude Opus 4.1, an upgrade to Claude Opus 4 on agentic tasks, real-world coding, and reasoning.

We plan to release substantially larger improvements to our models in the coming weeks.

Opus 4.1 is now available to paid Claude users and in Claude Code. It's also on our API, Amazon Bedrock, and Google Cloud's Vertex AI.

https://www.anthropic.com/news/claude-opus-4-1

Week later Anthropic checks highest volume user: Sam "Alterman"

That's coming exactly at the right time, when I need to do a large refactor. Luckily I postponed it and didn't do it yesterday.

simonwillison.net › 2025 › Nov › 24 › claude-opus

Claude Opus 4.5, and why evaluating new LLMs is increasingly difficult

1 month ago - Anthropic released Claude Opus 4.5 this morning, which they call “best model in the world for coding, agents, and computer use”. This is their attempt to retake the crown for best coding model after significant challenges from OpenAI’s GPT-5.1-Codex-Max and Google’s Gemini 3, both released within the past week!

Find elsewhere

Google Bing Mojeek

anthropic.com › news › claude-4

Introducing Claude 4

Claude Opus 4 is our most powerful model yet and the best coding model in the world, leading on SWE-bench (72.5%) and Terminal-bench (43.2%). It delivers sustained performance on long-running tasks that require focused effort and thousands of steps, with the ability to work continuously for several hours—dramatically outperforming all Sonnet models and significantly expanding what AI agents can accomplish.

claude.com › product › overview

Overview | Claude

1 month ago - Opus 4.5 · Most capable model for your most ambitious projects · Docs, slides, spreadsheets • Complex analysis • Deep research · Model details · Model detailsModel details · Sonnet 4.5 · Powerful and versatile model, designed for the work you do every day · Writing tasks • Fast analysis • Task automation · Model details · Model detailsModel details · Haiku 4.5 · Fastest model, a lightweight version of our most powerful AI ·

anthropic.com › news › claude-opus-4-1

Claude Opus 4.1

Opus 4.1 is now available to paid Claude users and in Claude Code. It's also on our API, Amazon Bedrock, and Google Cloud's Vertex AI.

docs.cloud.google.com › ai and ml › vertex ai › generative ai on vertex ai › claude opus 4.1

Claude Opus 4.1 | Generative AI on Vertex AI | Google Cloud Documentation

Anthropic's most powerful model yet and the state-of-the-art coding model. Claude Opus 4.1 delivers sustained performance on long-running tasks that require focused effort and thousands of steps, significantly expanding what AI agents can solve.

poe.com › Claude-Opus-3

Claude-Opus-3 - Poe

Explore GPT-5, Claude-Sonnet-4.5, DeepSeek-R1, Veo-3.1, Sora-2, and thousands of others, all on Poe.Download iOS appDownload Android appDownload Windows app ... Anthropic's Claude Opus 3 can handle complex analysis, longer tasks with multiple steps, and higher-order math and coding tasks.

axios.com › 2025 › 11 › 03 › anthropic-claude-opus-sonnet-research

Anthropic Claude Sonnet and Opus model show sophisticated awareness

November 3, 2025 - Claude Opus can answer questions about its own "mental state" and can describe how it reasons. Lindsey's team also found evidence last month that Claude Sonnet could recognize when it was being tested.

Google Cloud Platform

console.cloud.google.com › vertex-ai › publishers › anthropic › model-garden › claude-opus-4

Claude Opus 4 – Vertex AI

May 22, 2025 - Google Cloud Console has failed to load JavaScript sources from www.gstatic.com. Possible reasons are:www.gstatic.com or its IP addresses are blocked by your network administratorGoogle has temporarily blocked your account or network due to excessive automated requestsPlease contact your network ...

anthropic.com › research › end-subset-conversations

Claude Opus 4 and 4.1 can now end a rare subset of ...

We recently gave Claude Opus 4 and 4.1 the ability to end conversations in our consumer chat interfaces. This ability is intended for use in rare, extreme cases of persistently harmful or abusive user interactions. This feature was developed primarily as part of our exploratory work on potential ...

reddit.com › r/openai › what the hell ? claud 3 opus is a straight revolution.

r/OpenAI on Reddit: WHAT THE HELL ? Claud 3 Opus is a straight revolution.

March 24, 2024 -

So, I threw a wild challenge at Claud 3 Opus AI, kinda just to see how it goes, you know? Told it to make up a Pomodoro Timer app from scratch. And the result was INCREDIBLE...As a software dev', I'm starting to shi* my pants a bit...HAHAHA

Here's a breakdown of what it got:

The UI? Got everything: the timer, buttons to control it, settings to tweak your Pomodoro lengths, a neat section explaining the Pomodoro Technique, and even a task list.
Timer logic: Starts, pauses, resets, and switches between sessions.
Customize it your way: More chill breaks? Just hit up the settings.
Style: Got some cool pulsating effects and it's responsive too, so it looks awesome no matter where you're checking it from.
No edits, all AI: Yep, this was all Claud 3's magic. Dropped over 300 lines of super coherent code just like that.

Guys, I'm legit amazed here. Watching AI pull this off with zero help from me is just... wow. Had to share with y'all 'cause it's too cool not to. What do you guys think? Ever seen AI pull off something this cool?

Went from:

FIRST VERSION

To:

FINAL VERSION

EDIT: I screen recorded the result if you guys want to see: https://youtu.be/KZcLWRNJ9KE?si=O2nS1KkTTluVzyZp

EDIT: After using it for a few days, I still find it better than GPT4 but I think they both complement each other, I use both. Sometimes Claude struggles and I ask GPT4 to help, sometimes GPT4 struggles and Claude helps etc.

How much better is it than the version available on the website?

Couple days ago I used it to create a program that reads data from database, sends it to AI API, stores results and has GUI to edit prompts and select what records will be sent.

cloud.google.com › blog › products › ai-machine-learning › anthropics-claude-opus-4-and-claude-sonnet-4-on-vertex-ai

Anthropic’s Claude Opus 4 and Claude Sonnet 4 on Vertex AI | Google Cloud Blog

May 23, 2025 - Claude Opus 4 excels at coding, with sustained performance on complex, long-running tasks and agent workflows. Use cases include advanced coding work, autonomous AI agents, agentic search and research, tasks that require complex problem solving, ...

anthropic.com › news › claude-3-family

Introducing the next generation of Claude

Claude 3 Opus is our most intelligent model, with best-in-market performance on highly complex tasks. It can navigate open-ended prompts and sight-unseen scenarios with remarkable fluency and human-like understanding. Opus shows us the outer limits of what’s possible with generative AI.