Picking an AI is like picking a restaurant — each one is best at different dishes. No single tool wins everything. This guide helps you pick in 30 seconds.
Decision Tree — Start Here
What do you want AI to do?
├─ Writing / Q&A / Analysis
│ ├─ Long writing, editing → Claude (best at prose)
│ ├─ General questions, summaries → ChatGPT (easy start, free)
│ └─ Need latest web info → Gemini or ChatGPT (search)
│
├─ Image generation
│ ├─ Realistic, commercial-grade → Midjourney / FLUX
│ ├─ Free, within ChatGPT → DALL-E (free in ChatGPT Plus)
│ └─ Simple logo, icon → ChatGPT / Gemini
│
├─ Coding
│ ├─ IDE + autocomplete → GitHub Copilot / Cursor
│ ├─ Ask questions, debug → Claude / ChatGPT
│ └─ Build new project → Claude Code CLI (dev-focused)
│
├─ Research documents (PDF, docx)
│ ├─ Summarize long docs → Claude (200K token context)
│ ├─ Ask specific questions in doc → NotebookLM (Google)
│ └─ Multiple docs at once → Claude Projects / Perplexity
│
├─ Audio / Music
│ ├─ Voiceover, TTS → ElevenLabs
│ ├─ Music → Suno / Udio
│ └─ Podcast from text → NotebookLM
│
└─ Video
├─ Short animated clips → Runway / Pika / Sora
└─ Edit existing clips → Descript / CapCut (AI built-in)Popular Options at a Glance
| AI | Strength | Price | Best for |
|---|---|---|---|
| ChatGPT | Biggest ecosystem, plugins, free image gen | Free / $20/mo | Everyone — start here |
| Claude | Best writing, longest context, quality-aware | Free / $20/mo | Writers, devs, analysts |
| Gemini | Tied to Google (Docs, Gmail, Drive) | Free / $20/mo | Google Workspace users |
| Perplexity | Search + cites sources clearly | Free / $20/mo | Research, fact-checking |
| Midjourney | Most beautiful images, deep styles | $10-60/mo | Designers, marketers |
| Copilot | IDE integration | $10/mo | Developers |
| NotebookLM | PDF summaries, podcast from notes | Free (limited) | Students, researchers |
Pro Tip — Don’t Marry One AI
Each AI excels at different things. The best practice is to use 2-3 in parallel:
Recommended combo for general use:
- ChatGPT (free) — quick daily questions
- Claude (free) — long writing, analysis
- Perplexity (free) — fact-finding + citations
Zero budget with these three gets you ~80% of what the Pro tier delivers.
Combo for devs:
- Claude Code CLI — coding, refactoring
- Cursor / Copilot — IDE autocomplete
- Perplexity — finding libraries, Stack Overflow
Red Flags — AI Tools to Avoid
- No clear privacy policy — your data might leak
- Routed through unofficial LINE OA — many Thai “AI” middleware services wrap OpenAI accounts and may leak your queries
- “100% authentic Thai AI” without disclosing the backbone model — 90% are just GPT/Claude wrappers with marked-up pricing
- Asks for bank info upfront — use trials + low-limit credit cards first
One-Line Summary
If you don’t know where to start: ChatGPT (free) + Claude (free) + Perplexity (free) covers 80% of what paid tiers offer. Upgrade only when you hit a specific limit.