🟢 Mis à jour juin 2026
ChatGPT vs DeepSeek : Comparatif Complet (2026)
ChatGPT et DeepSeek sont tous deux populaires — mais avec des points forts différents. Voici ce que disent les données.
⚡ Quick comparison
| Feature | ChatGPT | DeepSeek |
|---|---|---|
| Rating | ★★★★☆ 8.8/10 🏆 Winner | ★★★☆☆ 7.9/10 |
| Monthly price | $20 | Free |
| API (input / output per 1M) | $5 / $15 | $0.14 / $0.28 |
| Context window | 128K tokens | 128K tokens |
| Free tier | ✅ Yes | ✅ Yes |
| Provider | OpenAI | DeepSeek AI |
| Best for | General tasks, Content writing | Budget coding projects, Research |
🧠 LLM Benchmark Deep-Dive
| Metric | ChatGPT | DeepSeek |
|---|---|---|
| Context window | 128K 🏆 Larger | 128K |
| Cost — 1M input tokens | $5 | $0.14 |
| Cost — 1M output tokens | $15 | $0.28 |
| Cost per 10k support tickets (800 tokens avg) | $80.00 | $1.68 |
| Free tier | ✅ Yes | ✅ Yes |
| Overall rating | 8.8/10 🏆 | 7.9/10 |
🏢 Enterprise use cases
| Use case | ChatGPT | DeepSeek |
|---|---|---|
| Customer support automation | ⚠️ Possible | ⚠️ Possible |
| Document analysis | ✅ Strong | ⚠️ Basic |
| Code generation | ⚠️ Basic | ✅ Strong |
| GDPR / EU compliance | ⚠️ Check terms | ⚠️ Check terms |
💡 Cost tip: At 10,000 tickets/month with ~800 tokens per ticket, the API cost difference between these models can be $19–$59/month. Use our ROI Calculator for your exact volume.
✅ ChatGPT — Pros
- Huge plugin ecosystem
- Best brand recognition
- Strong multimodal (vision)
- Largest user community
❌ ChatGPT — Cons
- Context window smaller than Claude
- Hallucinations on complex facts
- API more expensive than competitors
✅ DeepSeek — Pros
- Extremely cheap API ($0.14/M)
- Strong coding and math
- Open-source weights available
- Free to use
❌ DeepSeek — Cons
- Data stored in China (privacy risk)
- Banned in some enterprises
- Less reliable uptime
- No GDPR compliance
🏁 Verdict
D'après une analyse indépendante de benchmarks publics et de données tarifaires, ChatGPT obtient un meilleur score global (8.8/10 vs 7.9/10). Cependant, DeepSeek gagne sur certains scénarios spécifiques.
- Choisissez ChatGPT si: General tasks, Content writing, Customer-facing chatbots
- Choisissez DeepSeek si: Budget coding projects, Research, Non-sensitive internal tools
❓ Questions fréquentes
ChatGPT est-il meilleur que DeepSeek ?
ChatGPT scores higher overall (8.8/10 vs 7.9/10). The best choice depends on your use case — see the verdict above.
Lequel est moins cher : ChatGPT ou DeepSeek ?
DeepSeek at $0/month vs $20/month for ChatGPT.
Pour quoi ChatGPT est-il le meilleur ?
General tasks, Content writing, Customer-facing chatbots.
Pour quoi DeepSeek est-il le meilleur ?
Budget coding projects, Research, Non-sensitive internal tools.
ChatGPT ou DeepSeek ont-ils une offre gratuite ?
ChatGPT has a free tier. DeepSeek has a free tier.
⚠️ Basé sur une analyse indépendante des données de tarification publiques et benchmarks documentés. Juin 2026. See our methodology.