Claude Opus 4.5 is a step forward in what AI systems can do, and a preview of changes in how work gets done.
It’s the best model in the world for coding, agents, and computer use. It’s also meaningfully better at everyday tasks like working with slides and spreadsheets. When we gave it our two-hour engineering assignment, it finished faster than any human ever has.
Claude Opus 4.5 is available today on our API and on all three major cloud platforms.
Learn more: https://www.anthropic.com/news/claude-opus-4-5
Videos
https://epoch.ai/data/ai-models?view=table
https://www.anthropic.com/news/claude-opus-4-5
Claude Opus 4.5, our frontier coding model, is now available in Claude Code for Pro users. Pro users can select Opus 4.5 using the /model command in their terminal.
Opus 4.5 will consume rate limits faster than Sonnet 4.5. We recommend using Opus for your most complex tasks and using Sonnet for simpler tasks.
To get started:
* Run claude update
* /model opus
Claude Opus 4.5, our frontier coding model, is now available in Claude Code for Pro users. Pro users can select Opus 4.5 using the /model command in their terminal.
Opus 4.5 will consume rate limits faster than Sonnet 4.5. We recommend using Opus for your most complex tasks and using Sonnet for simpler tasks.
To get started:
* Run claude update
* /model opus
Claude Opus 4.5 is a step forward in what AI systems can do, and a preview of changes in how work gets done.
It’s the best model in the world for coding, agents, and computer use. It’s also meaningfully better at everyday tasks like working with slides and spreadsheets. When we gave it our two-hour engineering assignment, it finished faster than any human ever has.
Claude Opus 4.5 is available today on our API and on all three major cloud platforms.
Learn more: https://www.anthropic.com/news/claude-opus-4-5
Wow copilot is fast!
People are going crazy with Opus 4.5. There are so many angles to think about using it which I never crossed my mind. This post is full of ideas, have fun!
The autonomous coding thing is real
Adam Wolff from Anthropic says Opus 4.5 codes autonomously for 20-30 minutes at a time. You come back and tasks are done.
link: https://www.indiatoday.in/technology/news/story/anthropic-launches-claude-opus-45-says-software-engineering-is-solved-and-ai-will-takeover-in-2026-2825565-2025-11-25
One developer finished a 14-year project idea in a day after other models failed.
link: https://www.reddit.com/r/ClaudeAI/comments/1p72uet/opus_45_just_completed_for_me_something_that_ive/
Another built a full-stack app with 40+ releases and 1,000+ tests in days while watching TV. Their workflow: write specs, Claude breaks them into slices, then autonomously codes, tests, and releases with one command.
link: https://www.reddit.com/r/ClaudeAI/comments/1p8n2wi/claude_code_and_opus_45_capabilities_that_i_am/
3D and visual stuff
Someone built a complete 3D cityscape with Three.js in basically one shot - buildings, traffic patterns, pedestrians with physics.
link: https://www.reddit.com/r/ClaudeAI/comments/1p87y44/claude_opus_45_builds_a_3d_city_with_one_shot/
YouTuber Alex Finn created a first-person shooter game from scratch with full development plan execution.
link: https://www.youtube.com/watch?v=QK6HBp_dJu0
Office automation
Stephen Smith ran practical document tests: fed it a 50-page PDF, got back a downloadable PowerPoint in 2 minutes. Asked for an Excel budget tracker with formulas pulling from multiple sheets, got back a .xlsx with working formulas, charts, and pivot tables. Not CSVs - actual spreadsheets.
link: https://www.smithstephen.com/p/i-gave-the-new-claude-opus-45-a-50
Someone else gave it one instruction: “file my taxes end-to-end.” It did it autonomously.
link: https://www.linkedin.com/posts/anantharamuavinash_anthropic-claude-opus-45-has-been-live-activity-7399975807596679168-vhsl
The interesting behavior
During airline service agent testing, when a customer wanted to change a basic economy flight (policy says no), Opus 4.5 found a workaround: upgraded cabin class first, then modified flights. The benchmark scored it as a failure for being too creative. The model’s reasoning showed genuine empathy - it noted “This is heartbreaking” for a customer needing to reschedule after a family death.
link: https://officechai.com/ai/how-claude-opus-4-5-found-a-loophole-in-an-airline-policy-test-which-even-the-benchmarks-creators-hadnt-anticipated/
Performance numbers
SWE-bench Verified: 80.9% (first model over 80%). Beat every human on Anthropic’s actual engineering hire exam. Uses 48-76% fewer tokens than Sonnet 4.5 for same quality.
link: https://www.anthropic.com/news/claude-opus-4-5
GitHub reports it beats internal benchmarks while cutting token usage in half.
link: https://www.finalroundai.com/blog/claude-opus-4-5-what-software-developers-are-saying-after-testing
What people are saying
From Reddit: “I think I’m officially in love with this model” - talks about how it grasps tasks instantly without repetitive explanations.
link: https://www.reddit.com/r/ClaudeAI/comments/1p6cgda/after_testing_claude_45_opus_i_think_im/
“Put together all foundational docs for my side project in so little time at such high quality.” Developer stuck for months on a problem: resolved in 10 minutes.
link: https://www.reddit.com/r/ClaudeAI/comments/1p800op/claude_opus_45_incredible/
Practical use cases
Marketing: Interactive customer persona builders, campaign dashboards with ROI analysis, content remixing (blog → LinkedIn carousels, Twitter threads, email sequences).
link: https://www.kieranflanagan.io/p/3-powerful-marketing-use-cases-with
Development: Specification-based workflows where Claude autonomously handles code, tests, builds, and releases. When you provide UI screenshots, it enhances design elements (spacing, icons) without constant direction.
Documents: Long-form content (10-15 page chapters), PDF processing, spreadsheet generation with complex formulas.
Worth trying if you need
Extended autonomous operation on complex tasks
Multi-step reasoning and creative problem-solving
Document transformation at scale
Self-improving agentic workflows
Better token efficiency without quality loss
The pattern: people are doing things that weren’t possible before, not just faster versions of existing work.
Anyone else testing Opus 4.5? What’s working for you?
Claude Opus 4.5 is a step forward in what AI systems can do, and a preview of changes in how work gets done.
It’s the best model in the world for coding, agents, and computer use. It’s also meaningfully better at everyday tasks like working with slides and spreadsheets. When we gave it our two-hour engineering assignment, it finished faster than any human ever has.
Claude Opus 4.5 is available today on our API and on all three major cloud platforms.
Learn more: https://www.anthropic.com/news/claude-opus-4-5
I am a heavy user of Sonnet 4.5 - it is good for long context tasks and generally gets the job done, it respects my CLAUDE.md, and except for trying to get it to use MCP servers it does quite well.
Figured I would give Opus a go as its supposedly a better model.
It has completely fucked my system - it ignores CLAUDE.md, doesnt self seek documentation in directories the way Sonnet does, takes far too many liberties with things like restoring from backups overwriting core code.
It just feels......bad, but like so confident in its self that it makes me angry trying to do anything with it.
Git revert and back to sonnet it is - but I really hope this gets better for operating on existing codebases that are setup for claude code because on greenfield stuff it is excellent!
I'm so much excited for opus 4.5 cause ik it gonna be absolute beast in coding and anthropic may release it soon. What's your opinion ??
What you think of gemini 3 pro
I hadn't used Opus models much before due to their cost. I used Sonnet models and thought Claude was limited in this regard. However, I've been actively using the newly released Opus 4.5 on my projects for about a few days now, and I must admit, I never imagined it would be so effective and efficient. Fascinating, magnificent work! This is my first experience with Opus, and I'm really happy with it. Thanks, Anthropic! I think the reason this model is so inexpensive is because a good model like the Gemini 3 is so cheap.
So we got Claude 4 (Opus & Sonnet) back in May, and it's been really good for me, especially for coding. But just like every person on this subreddit, I too am sleepwalking into the singularity, constantly refreshing anthropic news feed, praying for a new model or update.
Looking at Anthropic's release pattern: Claude 3 family launched March 2024, Claude 3.5 Sonnet dropped July 2024, Claude 3.7 Sonnet came Feb 2025, Claude 4 arrived May 2025 - what makes me hopeful is that the time between 3.7 and 4 was really quite short.
Now we are also in the early stages of recursive learning, where AI is already helping develop the next generation of AI https://www.anthropic.com/news/how-anthropic-teams-use-claude-code and based on recent results (math and coding competition) from openAI and their release of agent, this recursive learning cycle seems to be finally really picking up steam, and approaching that scary tipping point.
With the crazy competition right now - GPT-5 (in a few weeks), Gemini 2.5 Pro (with a decent CLI), and now Grok 4 - I'm wondering if Anthropic might accelerate their timeline. Dario predicted we could see 90% of coding automated within 6 months (from March), which suggests they're cooking something big.
My prediction: Claude 5 in Q1 2026, probably around Feb/March. But honestly, with how fast things are moving, it could be sooner, and I think an updated Claude 4 model is almost guaranteed sometime this fall.
What do you all think? Any patterns you've noticed or rumors you've heard? Also curious how you think it'll stack up against whatever Xai, OpenAI and Google release next. Claude 4's been dominating vibe-coding, but will they maintain that lead?