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Quick verdict: As of August 2026, DeepSeek V4 flash remains the cheapest serious model in the world at $0.14/M input — 3.6x cheaper than OpenAI’s budget model (gpt-5.6-luna) and 7x cheaper than Claude’s budget tier (Haiku 4.5). On price-per-performance, no US lab currently comes close. The catch: DeepSeek has announced a significant price increase is … Read more

Quick verdict: The DeepSeek V4 API (flash from $0.14/M input tokens) is a developer’s best-kept secret in 2026: real JSON output, reliable function calling, a 50x cheaper context-cache path, and an Anthropic-compatible endpoint for easy migration. But its default thinking mode has a trap that will hand you empty responses — I hit it, and … Read more

Quick verdict: DeepSeek V4 Pro ($0.435/M input tokens, $0.87/M output) is the reasoning flagship of the V4 family. In my testing it delivered deeper, better-documented code than the flash tier and a genuinely impressive visible chain-of-thought — but it’s ~2x slower and 3x pricier, and its default thinking mode has a footgun for API developers. … Read more

Quick verdict: DeepSeek V4 (released July 31, 2026) is a fast, capable AI model family with a 1M-token context window, available as deepseek-v4-flash (from $0.14/M input tokens) and deepseek-v4-pro ($0.435/M input). In hands-on API testing it handled math reasoning, code generation, translation, and opinion writing with sub-5-second latency and a genuinely human writing voice. DeepSeek … Read more