I just tried Sonnet 4.5 and it seems faily superior to Opus 4.1 for writing....but I just tried briefly Answer from zona-curator on reddit.com
Reddit
reddit.com › r/claudeai › sonnet 4.5 vs. opus 4.1 for academic writing (ideas/understanding)/brainstorming/summarizing etc?
r/ClaudeAI on Reddit: Sonnet 4.5 vs. Opus 4.1 for academic writing (ideas/understanding)/brainstorming/summarizing etc?
September 29, 2025 -
Which model is likely better as a "professor" if you will. One who understands, corrects me, helps editing work on accuracy, gives writing suggestions, etc.
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I just tried Sonnet 4.5 and it seems faily superior to Opus 4.1 for writing....but I just tried briefly
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Just tested both models on a rewrite with some changes on a working paper. Sonnet 4.5 delivered better writing and analytical quality and I noted that it was more academic. But analytical quality required extended thinking enabled on Sonnet 4.5.
Lisa Peyton
lisapeyton.com › home › claude 4.1 opus vs. claude 4.5 sonnet: a real-world showdown for content marketers
Claude 4.1 Opus vs. Claude 4.5 Sonnet: A Real-World Showdown for Content Marketers | Lisa Peyton
October 2, 2025 - But if I’m being honest (and I always am), Claude 4.5 Sonnet is where I’m spending my time now. For the kind of strategic content marketing work I do—newsletters, thought leadership, analysis pieces—it just performs better. That said, I’m not deleting my Opus access. There are absolutely times when I want that creative energy and bold ideation that Opus brings. Sometimes you need the spark, not the polish. ... Take one of your content prompts (ideally something substantial, not just “write a social post”)
If Sonnet 4.5 is "better" than Opus 4.1, why use opus?
For now, using Claude Sonnet 4.5 is the de-facto model we should be using. Claude Opus 4.5 is gonna be crazy expensive performant. More on reddit.com
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September 29, 2025Sonnet 4.5 vs Opus 4.1
I just tried it and opus 4.1 is still superior. Had a cookie issue that sonnet 4.5 introduced and after 5+ attempts to fix it, I switched back to opus 4.1 and it fixed it in one try. This is just one scenario but Makes me think the benchmarks are meaningless Update: I had sonnet 4.5 also working on a different issue and it decided to create a completely new simplified file instead of just modifying the one we’ve been working on. Maybe this model just needs very specific instructions but it was pretty much obvious to opus 4.1. More on reddit.com
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September 29, 2025Is Claude Code Sonnet 4.5 Really Better Than Opus 4.1? Not Seeing It.
The situation is less about Sonnet 4.5 being a disappointment and more about a strategic shift in how the AI models are being offered. For power users, the key takeaway is that the workflow must now adapt. Opus 4.1 remains the superior tool for deep, complex tasks, but it is now positioned as a premium, limited resource. Sonnet 4.5 is the new, faster default for everything else. The frustration is a natural consequence of this transition, especially when the communication and marketing don't fully articulate this nuanced strategy to the most dedicated segment of the user base. More on reddit.com
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October 3, 2025Sonnet 4.5 vs. Opus 4.1 for academic writing (ideas/understanding)/brainstorming/summarizing etc?
I just tried Sonnet 4.5 and it seems faily superior to Opus 4.1 for writing....but I just tried briefly More on reddit.com
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September 29, 2025Medium
medium.com › @ayaanhaider.dev › sonnet-4-5-vs-haiku-4-5-vs-opus-4-1-which-claude-model-actually-works-best-in-real-projects-7183c0dc2249
Sonnet 4.5 vs Haiku 4.5 vs Opus 4.1 — Which Claude Model Actually Works Best in Real Projects | by Ayaan haider | Medium
October 18, 2025 - Sonnet 4.5 Sonnet is the all-rounder. It’s the model I trust for daily work — writing logic, managing state, connecting APIs, and handling multiple files. It’s reliable, consistent, and doesn’t freeze easily.
Creole Studios
creolestudios.com › home › claude sonnet 4.5 vs opus 4.1: which model wins for coding, agents, and long runs?
Sonnet 4.5 vs Opus 4.1: Which one is best for Coding & Agents?
October 9, 2025 - Where it can still win: If your ... architectural reasoning on specific codebases. Decision hint: If your pain is broken CI and partial fixes, trial Sonnet 4.5 first....
CodeRabbit
coderabbit.ai › blog › claude-sonnet-45-better-performance-but-a-paradox
Claude Sonnet 4.5: Better performance but a paradox
October 3, 2025 - We benchmarked Claude Sonnet 4.5 as it narrows the gap with Opus 4.1 in code review, catching more critical bugs with 41% important hits at lower cost.
Every
every.to › feeds › a96d5b12f53dc11a446f › vibe-check-we-tested-claude-sonnet-4-5-for-writing-and-editing
We Tested Claude Sonnet 4.5 for Writing and Editing
October 29, 2025 - Sonnet 4.5 appears to be less easy to please than Opus 4.1. Where Opus told me my hook—the opening of an article that draws people in—was already in the right place, Sonnet pushed me to rearrange it slightly.
Reddit
reddit.com › r/claudeai › sonnet 4.5 vs opus 4.1
r/ClaudeAI on Reddit: Sonnet 4.5 vs Opus 4.1
September 29, 2025 -
I've been using fully Claude Opus 4.1 in my terminal setup for coding, reasoning, and agent-like tasks. it's been solid for complex workflows. But now that Sonnet 4.5 is out, I'm wondering if I should switch. From benchmarks, it seems to match or beat Opus in areas like coding (higher scores on SWE-Bench and agentic tasks), visual reasoning, and handling nuanced instructions with better efficiency for iterative sessions. If you've tried both in a CLI/terminal environment, what's your take? Does Sonnet hold up for deep reasoning and long-chain planning, or does Opus still edge it out there?
For complex workflows, would you recommend switching? Experiences appreciated!
Top answer 1 of 5
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I just tried it and opus 4.1 is still superior. Had a cookie issue that sonnet 4.5 introduced and after 5+ attempts to fix it, I switched back to opus 4.1 and it fixed it in one try. This is just one scenario but Makes me think the benchmarks are meaningless Update: I had sonnet 4.5 also working on a different issue and it decided to create a completely new simplified file instead of just modifying the one we’ve been working on. Maybe this model just needs very specific instructions but it was pretty much obvious to opus 4.1.
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Better than Opus so far, for me.
Anthropic
anthropic.com › news › claude-sonnet-4-5
Introducing Claude Sonnet 4.5
Experts in finance, law, medicine, and STEM found Sonnet 4.5 shows dramatically better domain-specific knowledge and reasoning compared to older models, including Opus 4.1.
AutonomyAI
autonomyai.io › home › sonnet 4.5 vs. opus 4.1 – enterprise vibe coding
Sonnet 4.5 vs. Opus 4.1: Speed Today or Maintainability Tomorrow?
October 1, 2025 - We benchmarked Sonnet 4.5 against Opus 4.1. Opus delivers faster first results, while Sonnet (inside an agentic framework) produces cleaner, more accessible, and maintainable code. Here’s what tech leaders need to know.
ClaudeLog
claudelog.com › home › faqs › sonnet vs opus
Claude Sonnet 4.5 vs Opus for Claude Code - Performance Comparison | ClaudeLog
November 24, 2025 - Opus 4.5 excels at state-of-the-art software engineering (SWE-bench Verified leader), complex general reasoning, and agentic workflows. Workflow Efficiency - Using the right model for each task type optimizes both speed and quality without ...
Bind AI IDE
blog.getbind.co › 2025 › 09 › 30 › claude-sonnet-4-5-vs-gpt-5-vs-claude-opus-4-1-ultimate-coding-comparison
Claude Sonnet 4.5 vs GPT-5 vs Claude Opus 4.1 – Ultimate Coding Comparison
September 30, 2025 - Sonnet is more specialized toward endurance, safety, and long workflows. Opus remains a reliable all-rounder in the Claude family with strong coding/logic capabilities.
Reddit
reddit.com › r/claudecode › is claude code sonnet 4.5 really better than opus 4.1? not seeing it.
r/ClaudeCode on Reddit: Is Claude Code Sonnet 4.5 Really Better Than Opus 4.1? Not Seeing It.
October 3, 2025 -
How are people genuinely praising Claude Code Sonnet 4.5? I have no idea what’s happening…but from my experience it’s pretty disappointing. Sorry if that stings, but I’m honestly curious about what others see in it.
I’m speaking as someone who uses Claude Code daily easily 7+ hours per day and who has been deeply involved with it since the beginning. I consider myself a power user and truly understand the capabilities it should have. Maybe I’m missing something crucial here…but BESIDES that point I’m really dissatisfied and frustrated with Anthropic right now.
On top of that, the marketing hype around Sonnet 4.5 feels like the same garbage AI slot promotion we saw everywhere with ChatGPT lol. It’s being marketed as the “best model in the world,” likely to people who barely even scratch its surface.
I’ve also just hit a usage limit on Opus 4.1. I’m on the max 200 plan and now there’s some kind of cap in place…for what, a week? Why? If Sonnet is sooooo good why are they placing weekly limits on opus 4.1? So stupid. Can someone explain what’s going on here?
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Sonnet 4.5 solved a complex deadlock bug in two shots that Opus 4.1, Gemini 2.5 pro, and codex 5 cli thinking have spent weeks on. I’ve been impressed and I’ve gone from only Opus 4.1 to only Sonnet 4.5 with no noticeable degradation.
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The situation is less about Sonnet 4.5 being a disappointment and more about a strategic shift in how the AI models are being offered. For power users, the key takeaway is that the workflow must now adapt. Opus 4.1 remains the superior tool for deep, complex tasks, but it is now positioned as a premium, limited resource. Sonnet 4.5 is the new, faster default for everything else. The frustration is a natural consequence of this transition, especially when the communication and marketing don't fully articulate this nuanced strategy to the most dedicated segment of the user base.
YouTube
youtube.com › watch
Claude Sonnet 4.5 Is Here… And It’s BETTER Than Opus?! (First Look) - YouTube
Claude Sonnet 4.5 is finally here — and it’s said to be better than Claude Code Opus. But is it really an upgrade? In this video, I test Claude 4.5 against C...
Published September 29, 2025
YouTube
youtube.com › watch
Claude Sonnet 4.5 vs Opus 4.1 Coding Test | Which is the Best Coding Model? - YouTube
In this video we will compare claude sonnet 4.5 AI model with opus 4.1 for testing coding
Published September 30, 2025
Simon Willison
simonwillison.net › 2025 › Nov › 24 › claude-opus
Claude Opus 4.5, and why evaluating new LLMs is increasingly difficult
November 24, 2025 - “Here’s an example prompt which failed on Sonnet 4.5 but succeeds on Opus 4.5” would excite me a lot more than some single digit percent improvement on a benchmark with a name like MMLU or GPQA Diamond.
Every
every.to › vibe-check › vibe-check-claude-sonnet-4-5
Vibe Check: Claude Sonnet 4.5
September 29, 2025 - Anthropic just rolled out Claude Sonnet 4.5, and, of course, we spent the weekend using it to code and running long agentic tasks with it. The headline: It’s noticeably faster, more steerable, and more reliable than · Opus 4.1—especially ...
The New Stack
thenewstack.io › home › anthropic launches claude sonnet 4.5
Anthropic Launches Claude Sonnet 4.5 - The New Stack
September 29, 2025 - For long-running, complex tasks, Sonnet 4.5 can now run autonomously for 30 hours, up from seven hours for Opus 4. With these updates to the model, Anthropic says, Sonnet 4.5 can now do so while “maintaining focus and performance throughout,” ...
YouTube
youtube.com › watch
Claude 4.5 Sonnet Is Here! Better Than Opus? - YouTube
Write and publish more books with AI (20+ over time). Join the membership here: https://www.skool.com/story-hacker/aboutGet my exact AI book-writing prompts ...
Published October 1, 2025
X
x.com › ArtificialAnlys › status › 1972854742167761204
Anthropic's new Claude 4.5 Sonnet is now the #4 most ...
This represents a more compelling option, compared to Claude 4.1 Opus, offering higher intelligence in thinking mode at 1/5th the blended price (3:1 input to output token ratio) Key model details: ➤ Context window: 200K tokens ➤ Max output ...