Guide complet DeepSeek 2026 : le modele IA open source qui rivalise avec GPT-4
Tout savoir sur DeepSeek en 2026. Performances, modeles disponibles, utilisation gratuite, comparaison avec ChatGPT et Claude — le guide complet du challenger chinois.
DeepSeek has emerged as one of the most impressive AI model providers, offering near-GPT-4 performance at dramatically lower costs. This guide covers everything you need to know about using DeepSeek in 2026.
What Is DeepSeek?
DeepSeek is a Chinese AI lab that develops large language models. Their DeepSeek-V3 and DeepSeek-R1 models have achieved remarkable benchmarks, rivaling GPT-4o and Claude 3.5 Sonnet at a fraction of the cost.
Key Models
DeepSeek-V3
- General-purpose LLM with strong reasoning
- 671B parameters (37B active via MoE architecture)
- Competitive with GPT-4o on most benchmarks
- API cost: $0.14 per million input tokens (vs $2.50 for GPT-4o)
DeepSeek-R1
- Reasoning-focused model (similar to OpenAI o1)
- Exceptional at math, science, and complex analysis
- Open-source with MIT license
- Can be run locally
How to Use DeepSeek
Web Interface
Visit chat.deepseek.com for free access to DeepSeek models.
API
API access at api.deepseek.com with OpenAI-compatible endpoints, making migration easy.
Local Execution
Run DeepSeek-R1 locally via Ollama: \`\`\`bash ollama run deepseek-r1 \`\`\`
DeepSeek vs ChatGPT vs Claude
| Feature | DeepSeek | ChatGPT | Claude |
|---|---|---|---|
| Cost | Very low | Medium | Medium |
| Performance | Near GPT-4 | GPT-4o/o3 | Opus/Sonnet |
| Open Source | Yes | No | No |
| Local Run | Yes | No | No |
| Ecosystem | Limited | Extensive | Growing |
Considerations
- Data privacy: Traffic may route through Chinese servers
- Censorship on certain topics related to Chinese politics
- For sensitive use, run models locally
DeepSeek represents the democratization of high-quality AI, making frontier-level models accessible to everyone.