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DeepSeek release notes announcing V4.1 Flash 1017 and the in-house Search API

Model releases October 17, 2026 5 min read

DeepSeek V4.1 Flash 1017: Search API, Performance Gains, and Latest Pricing

What changed in DeepSeek V4.1 Flash 1017? A source-checked guide to the Search and Fetch APIs, benchmark gains, model IDs, 1M context window, and 2026 API pricing.

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