The Opus 4.8 One-Prompt Competitive Teardown (Copy, Paste, Done in 20 Minutes)

What You Will Learn

• Why Opus 4.8 is the right model for a multi-step teardown
• The full copy-paste prompt, ready to use
• How to feed it the right inputs so the output is trustworthy
• The one checkpoint that keeps it honest

A proper competitive teardown takes most people half a day. You open ten tabs, read three pricing pages, skim a competitor's recent announcements, screenshot their positioning, and try to assemble it into something a leadership team can act on. By the time it is formatted, the meeting has moved on.

Opus 4.8, released May 28, is built for exactly this shape of work: a long sequence of related steps that used to make earlier models drift. Because it holds intent across the whole task and re-plans as it goes, you can hand it the entire teardown as a single instruction and supervise one session instead of running ten prompts.

Below is the prompt. It runs in any Claude plan with Opus 4.8, and it also works if you select Opus 4.8 inside Microsoft 365 Copilot. The free preview ends here; the full prompt and the input checklist are for premium readers.

This is a PromptHacker Premium deep dive.

The full teardown prompt, the input checklist, and the honesty checkpoint are below.

Step 1: Give It the Real Inputs

The model is honest about gaps, which means it will tell you when it is guessing, but it cannot analyze a pricing page you never gave it. Before you run the prompt, gather: your competitor's name and website, their pricing page text or a screenshot, two or three of their recent announcements or product updates, and one sentence on what your company sells. Paste these in with the prompt.

Step 2: Run the Teardown Prompt

Copy-paste prompt for Opus 4.8

Step 3: Approve the Plan, Then Let It Run

When the model lists its five-step plan, read it. This is the checkpoint. If it misread your competitor or your market, you correct it once, here, before it writes a full report on a wrong premise. Once the plan is right, approve it and let Opus 4.8 complete the teardown in one pass.

Why this works: the dynamic workflow tool in Opus 4.8 lets it plan, adjust, and execute rather than locking into its first guess. The plan-then-approve checkpoint turns that autonomy into something you can trust without reading every intermediate step.

Why It Saves the Half Day

You are not prompting ten times and stitching the answers together. You give one well-formed instruction with real inputs, approve the plan once, and review a one-page output with confidence labels that tell you exactly where to push back. Most teardowns that took four to five hours land in about 20 minutes of your time, and the confidence notes mean you trust the parts marked high and verify the parts marked low.

Action Steps Summary

• Gather inputs first. Competitor URL, pricing text, two or three recent announcements, and one line on what you sell.
• Paste the prompt with inputs. Run it in Claude with Opus 4.8 selected, or inside Microsoft 365 Copilot.
• Approve the five-step plan. Correct any wrong assumption at the checkpoint before the report is written.
• Trust the confidence labels. Act on high-confidence sections; verify low-confidence ones with a quick check.
• Save and reuse. Keep the prompt. Rerun it on each competitor and each quarter in minutes.