The user wants me to write a blog article in Spanish about onboarding (employee onboarding) for an HR professional audience. Let me review the requirements:

1. Length: 900-1200 words

2. Structure: Compelling intro → 3-4 H2 sections with substantial content → Conclusion with CTA

3. Each H2 section must include a practical prompt with "PROMPT:" syntax

4. No generalizations - concrete steps, real tools, specific metrics

5. At least 2 practical examples

6. A section dedicated to common mistakes

7. Updated data 2026 - references to current versions of ChatGPT, Claude, Gemini

Style rules:

- Professional but friendly tone

- Correct Spanish orthography with accents

- No markdown, no HTML

- No self-references

- Varied vocabulary

- Prompts must have variables in [brackets]

Let me plan the article:

Title idea: Onboarding en 2026: comparativa de metodologías, herramientas y mejores prácticas

Sections:

1. Introduction - why onboarding matters, the stakes

2. H2: Modelos de onboarding: presencial vs. híbrido vs. remoto (comparativa) - with prompt

3. H2: Herramientas de IA para onboarding - ChatGPT, Claude, Gemini comparison - with prompt

4. H2: Métricas y KPIs para medir el éxito del onboarding - with prompt

5. H2: Errores comunes en el onboarding y cómo evitarlos

6. Conclusion with CTA

Let me write this with real content:

Introduction: Onboarding is critical - statistics show that good onboarding improves retention. Let me reference real data. In 2026, companies are dealing with hybrid work, AI tools, and changing expectations.

Section 1: Comparing models (presential, hybrid, remote)

- Presential: best for building bonds, but limits talent pool

- Hybrid: flexibility, but risks equity gaps between remote and office workers

- Remote: global talent, but requires more structured digital processes

Section 2: AI tools for onboarding - ChatGPT, Claude, Gemini

- ChatGPT (GPT-4o or whatever version by 2026) for generating onboarding plans, FAQs

- Claude for document analysis, summarizing processes, creating documentation

- Gemini for integration with Google Workspace, calendar automation

Section 3: Metrics and KPIs

- Time-to-productivity

- Retention rate at 90 days, 1 year

- eNPS during first 100 days

- Task completion rates for onboarding checklists

Section 4: Common mistakes

- Information overload

- Lack of follow-up after first week

- Not assigning a mentor/buddy

- Ignoring cultural integration

Examples: I need at least 2 concrete examples:

- Example of a tech company with remote onboarding using a buddy system and structured 30-60-90 day plan

- Example of a retail company with hybrid onboarding combining in-person store visits with digital training

Conclusion: CTA - invite to download a checklist, or share experiences

Prompts needed (at least 3):

1. For creating an onboarding plan with ChatGPT

2. For generating a "buddy guide" with Claude

3. For creating a metrics dashboard with Gemini

Let me write this all out properly. Need to be careful with word count - 900-1200 words.

Let me draft:

El coste oculto de un mal onboarding

Intro about how onboarding is handled in 2026...

Modelos de onboarding en 2026: presencial, remoto e híbrido

Content comparing models...

Prompt
[prompt for creating onboarding plan]