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DeepSeek V4 Pro 0813 Ships GA After a 4-Month Preview: 1.6T MoE, 49B Active, and DeepSWE Jumps 12.8 → 62.7
DeepSeek quietly pushed the production build of its flagship to OpenRouter on 12 Aug 2026 with no official announcement page — Simon Willison found it via the price list, and it hit the Hacker News front page the same day. It is a 1.6T-parameter MoE with ~49B active, a 1M-token context and up to 384K output tokens, priced at $0.435/M input (cache miss) and $0.87/M output. The agentic-coding deltas versus the preview are the story: DeepSWE 12.8 → 62.7, CyberGym 52.7 → 83.3, Terminal Bench 2.1 72.1 → 87.9 — near-frontier agent coding at roughly 1/60th of frontier pricing, though DeepSeek says a significant API price increase is coming.
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