Building Production AI Agents with DeepSeek V4 API: A Complete Guide (2026)
Dev.to AI
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Generative AI
Open Source AI
Building Production AI Agents with DeepSeek V4 API: A Complete 2026 Guide DeepSeek V4 dropped in April 2026 with a 1M token context window, native MCP, and agentic coding benchmarks that beat GPT-4o. At a fraction of the API cost. Here's how to actually build agents with it. ⚠️ Migration Warning: The old deepseek-chat and deepseek-reasoner endpoints will be deprecated on July 24, 2026. Migrate to deepseek-v4-pro and deepseek-v4-r1 now.