As of: 2026-11-13 13:49 CET. Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/ Canonical page: https://postcutoff.com/v/yt-paul-j-lipsky-anthropic-just-revealed-how-to-prompt-op/ # Anthropic Just Revealed How to Prompt Opus 5 Paul J Lipsky, 31 July 2026, YouTube. 90,186 views as of 8 October 2026. Kind: Tutorial. Watch: https://www.youtube.com/watch?v=Z8CtXdQExek ## Why it is here Found 2026-09-29 by YouTube search "introducing claude opus 5" (sorted by upload date). Listed as: 89,841 views, length 12:19, published "2mo ago" (so the date above is approximate). ## Description (written by Gemini from the video) **Summary** In this tutorial, presenter Paul J Lipsky reviews Anthropic's official prompting documentation for the newly released Claude Opus 5. He explains how to select appropriate models and reasoning effort settings across subscription tiers, and outlines five core prompting rules to optimize Opus 5 for knowledge work and design tasks. He then demonstrates these rules in Claude Design by generating a complete, single-page e-commerce website for a fictional brand in under three minutes. --- ### **What is shown** - **[00:00 - 00:15]** Anthropic's release page for Claude Opus 5 (dated July 24, 2026) alongside a benchmark comparison table evaluating Opus 5, Fable 5, Opus 4.8, and GPT-5.6 Sol. - **[00:16 - 00:30]** Anthropic's developer documentation page titled *"Prompting Claude Opus 5"*, highlighting behavioral differences, response length control, task scoping, and self-correction. - **[00:45 - 01:12]** The Claude web interface model selector showing `Fable 5`, `Opus 5`, `Sonnet 5`, and `Haiku 4.5`, alongside effort level options (`Low`, `Medium`, `High`, `Extra`, `Max`). - **[01:25 - 02:36]** Subscription workflow recommendations: using Sonnet by default on the $20/month Pro tier (reserving Opus 5 for complex tasks), versus defaulting to Opus 5 on the $100+/month Max plan. - **[02:40 - 03:34]** Explanation of effort levels, demonstrating that `Medium` or `Low` effort is generally sufficient for standard knowledge work without excess token consumption. - **[03:41 - 08:48]** Breakdown of the five prompting rules while drafting a prompt for "Northline Coffee": - *Rule 1:* Give Claude the whole job upfront instead of piecemeal steps [04:15]. - *Rule 2:* Set clear scope limits so Opus 5 does not over-deliver [05:22]. - *Rule 3:* Explicitly dictate the format and brevity of the final answer [06:06]. - *Rule 4:* Constrain the physical length/size of the work deliverable [06:53]. - *Rule 5:* Omit redundant verification instructions ("check twice") because Opus 5 auto-checks in-flight [08:00]. - **[08:49 - 09:39]** The finished prompt pasted into Claude Design, running Opus 5 on `Medium` effort with brand asset image files attached. - **[09:40 - 11:30]** Generation and inspection of the complete Northline Coffee landing page rendered in Claude Design in under three minutes, verifying all six requested sections and concise bulleted deliverables. --- ### **Claims & numbers** - **Benchmarks shown on screen [00:05]:** - *Agentic terminal coding (Frontier-Bench v2.1):* Opus 5 (43.3%), Fable 5 (33.7%), Opus 4.8 (21.1%), GPT-5.6 Sol (34.4%). - *Novel problem-solving (ARC-AGI-2):* Opus 5 (30.2%), Opus 4.8 (1.5%), GPT-5.6 Sol (7.8%). - *Agentic search (BrowseComp):* Opus 5 (90.8%), Fable 5 (87.4%), Opus 4.8 (84.3%), GPT-5.6 Sol (90.4%). - *Multidisciplinary reasoning (Humanity's Last Exam no tools):* Opus 5 (56.3%), Fable 5 (56.5%), Opus 4.8 (49.8%). - *Computer use (OSWorld 2.0 with tools):* Opus 5 (70.6%), Fable 5 (66.1%), Opus 4.8 (55.7%). - *Agentic coding (DeepSWE v1.1):* Opus 5 (68.8%), Fable 5 (69.7%), Opus 4.8 (59.0%), GPT-5.6 Sol (72.7%). - **Pricing:** The presenter specifies the Claude Pro plan costs $20/month and the Claude Max tier starts at $100/month [01:25, 01:44]. - **Performance & Time:** The presenter states that generating the complete 6-section landing page with brand assets inside Claude Design took "a little less than 3 minutes" [10:01]. --- ### **Notable quotes** - *"The effort setting mainly controls how much thinking Claude does, which affects the time and tokens it spends on the task."* [02:56] - *"Opus 5 already checks and fixes its work as it goes along."* [08:20] - *"Let Opus 5 use its intelligence — without making it overuse it."* [11:43] --- ### **Assessment** This is an authentic tutorial and practical workflow review created by an independent software educator analyzing Anthropic's official documentation. The UI demonstrations in Claude Cowork and Claude Design represent real product usage, with the webpage rendering cut slightly for pacing but showcasing a working, responsive output directly adhering to the prompt constraints. _Described by gemini-3.8-flash on 2026-09-29 from the video's audio and frames._ ## How AI was used to make it AI made a small part of this video (Subject built by AI). - Generating a complete responsive e-commerce landing page from a single prompt in Claude Design Tools: Claude Opus 5, Claude Design (Classified by gemini-3.8-flash from our description; high confidence. Overview: https://postcutoff.com/ai-video/) ## Related - 2026-07-24: [Anthropic releases Claude Opus 5](https://postcutoff.com/e/2026-07-24-claude-opus-5/) ## More videos on this - 2026-07-31: [Claude Opus 5 is a freak](https://postcutoff.com/v/yt-ai-search-claude-opus-5-is-a-freak/), AI Search, YouTube, community, 691,630 views as of 9 October 2026. - 2026-07-27: [A game from one 24-hour Claude Opus 5 session: every pixel and sound built by Claude](https://postcutoff.com/v/anshuc-opus-5-24-hour-game-x/), Anshu (@anshuc), X, made by AI, 663,484 views as of 9 October 2026. - 2026-09-08: [I Tested Fable 5.1 vs Fable 5 vs Opus 5 (Cost/Speed/Design)](https://postcutoff.com/v/yt-brock-mesarich-ai-fo-i-tested-fable-5-1-vs-fable-5-vs-opus-5/), Brock Mesarich | AI for Non Techies, YouTube, review, 22,457 views as of 6 November 2026. - 2026-09-29: [NEW Sonnet 5.5 Is Opus 5 Level](https://postcutoff.com/v/yt-mehul-mohan-new-sonnet-5-5-is-opus-5-level/), Mehul Mohan, YouTube, community, 21,319 views as of 24 October 2026. What else happened that month, day by day: https://postcutoff.com/timeline/2026/07/