ChatGPT vs DeepSeek
Two strong options — here's where they genuinely differ, and which one fits what you're trying to do.
| ChatGPT | DeepSeek | |
|---|---|---|
| Developer | OpenAI | DeepSeek (China) |
| Current model | GPT-5.5 (free) / GPT-5.x ladder on paid tiers | DeepSeek V3 / R1 family |
| Free tier | Yes — limited GPT-5.5 messages (roughly 10 per 5 hours), with browsing, file uploads and image analysis; ad-supported elements introduced in 2026 | Yes — generous free chat access |
| Paid from | $8/mo (Go) — Plus $20/mo | API-priced (very low per-token costs) |
| Plan ladder | Free · Go $8 · Plus $20 · Pro $100 · Pro Max $200; Business $25/user/yr-billed | Free chat · pay-as-you-go API |
| Context window | Large (varies by tier/model) | Large |
| Multimodal | Text, images, voice, file analysis, image generation | Primarily text-focused |
| Public API | ✔ Yes | ✔ Yes |
| Open weights | ✕ No | ✔ Yes |
| Data & privacy | Consumer chats may be used for training unless you opt out; UK data residency available on Enterprise/API tiers | Data processed in China — a hard blocker for many UK businesses and public-sector users |
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The verdict
Choose ChatGPT if your priority is good at everything, writing & content, image generation, voice conversation, business & teams.
Choose DeepSeek if you care more about best value / free use, coding & development, open-source / self-host.
Both offer free tiers — the genuinely sensible move is to try each on a task you actually do, then pay for the one that earned it.