Recommendation (short): Use a two-step pipeline: 1) extract hooks, angles, and assets from the 2k-word post, then 2) expand those into platform-tailored caption sets, image prompts, and a newsletter blurb. Run the pipeline in a structured editor (Jasper for team workflows or ChatGPT for quick solo runs).

Why this works: separating “analysis” from “rewrite” keeps the model focused and gives you reusable building blocks (hooks, CTAs, keywords) you can mix-and-match across platforms.

Core prompt templates (copy/paste, replace {{blog_text}} and {{brand_voice}}):

1) Extract hooks, quotes, and content pillars
Prompt: "Read the following blog post delimited by triple backticks. Output: (A) 8 punchy one-line hooks (5–12 words each) that would stop a scroll; (B) 6 content pillars (short labels); (C) 10 short pull-quotes (12–20 words) ideal for graphics; (D) 8 suggested CTAs ranked by conversion intent. Keep tone = {{brand_voice}}. Blog: ```{{blog_text}}```"

2) Build a week-long platform pack
Prompt: "Using the extracted hooks/pillars, create a 7-day cross-platform pack. For each day output: platform (LinkedIn, X, Instagram caption + 2-line alt, Reels/TikTok short script idea, 2 image prompts, 5 hashtags, CTA). Keep captions platform-appropriate (LinkedIn: 3–6 sentences professional; X: 1–3 pithy lines; Instagram: 1–2 short paragraphs + 1-line CTA). Keep tone = {{brand_voice}}. Also give a 40–70 word newsletter blurb linking to the blog and one subject line option."

3) Generate A/B caption variations
Prompt: "Take this caption (paste) and produce 3 A/B variants: A (data/logic), B (story/empathy), C (curiosity/hook). Each variant 1–2 sentences + one emoji suggestion + one CTA."

4) Image/creative prompt (for designers or AI art)
Prompt: "Create 2 image prompts for each caption: 1) On-brand stock-photo direction (composition, subject, color palette), 2) AI image prompt for Midjourney/StableDiffusion (brief style, focal subject, mood, color hex). Include 1 alt-text (90 chars) for accessibility."

Decision criteria (pick version by):
- If you need speed & scale: prioritize short captions + more visuals. Use lower creativity (temp 0.2–0.4).
- If brand voice is nuanced or legal-sensitive: human edit after generation; use conservative model temp 0.2.
- If testing new messaging: create 3 tonal variants and A/B test across small audiences.

Best-for / Avoid-if
- Best for: small marketing teams repurposing long-form into multi-platform content quickly; content calendars and performance testing.
- Avoid if: you need highly technical accuracy (legal/medical) without expert review.

Practical checklist before publishing
1) Run Extract prompt → save hooks/pillars. 2) Run Week Pack prompt using saved hooks. 3) Produce A/B variants and image prompts. 4) Quick factual & compliance check. 5) Schedule with times per platform. 6) Tag assets and track UTM for each post.

Notes on tooling & workflow: Jasper works well if you manage a team and want structured templates and approvals; ChatGPT is great for ad-hoc drafts. Choose based on budget, team size, and whether you need integrated collaboration.

If you want, I can expand these into ready-to-use Jasper templates (one-click) or give explicit character-count rules per platform.

Compare Jasper and Writesonic