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TopicDeepSeek V4.1-Flash-1017 Release

Flash·Models & Products·2026-10-18 02:13

DeepSeek V4.1-Flash-1017 Released: Weights Reportedly Open Under MIT License, In-House Search API Launches

DeepSeek released V4.1-Flash-1017 on October 17, an updated snapshot of V4.1-Flash: the weights were reportedly published on Hugging Face under the MIT license; alongside new benchmark scores, the company opened its in-house search and fetch API.

HIMIAO Horizon·2026-10-18 02:13·1 min read

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DeepSeek V4.1-Flash-1017 cover: a bright data center hall with a whale emblem
Image: AI-generated

What happened

According to MarkTechPost's October 17 report, DeepSeek released V4.1-Flash-1017 that day, an updated snapshot of the V4.1-Flash series. Outlets including aiweekly report the snapshot's weights are now on Hugging Face under the MIT license (MarkTechPost's spec table lists the license as undisclosed; the Hugging Face model card is authoritative).

MarkTechPost reports DeepSeek's published benchmark scores: 77.0 on DeepSWE v1.1 (74.2 for the previous generation, 74.0 for Claude Opus 5) and 42.3 on Terminal-Bench 4.0 (31.2 previously). DeepSeek also opened its in-house Search/Fetch API at $0.75 per thousand calls; calls made inside DeepSeek Harness, Claude Code, and Codex are free until November 1.

Key facts

  1. Release date: October 17, 2026 (reported by MarkTechPost at 08:53 UTC)
  2. Weights license: Reportedly published on Hugging Face under the MIT license; some outlets list it as undisclosed — the model card is authoritative
  3. Benchmarks: 77.0 on DeepSWE v1.1 and 42.3 on Terminal-Bench 4.0, both figures published by DeepSeek
  4. Search API: In-house Search/Fetch API at $0.75 per thousand calls; free inside three coding tools until November 1
  5. Community buzz: A free-model plugin for DeepSeek Harness gained over 1,700 stars in a day on GitHub's October 17 trending list

Why it matters

DeepSeek opened its in-house search API ($0.75 per thousand calls) alongside the flagship snapshot weights: a single release covering both model weights and an agent search toolchain.
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CompaniesDeepSeek

SourcesMarkTechPost (Oct. 17, 2026, original); aiweekly (Oct. 17, 2026, original). This article is a compilation of public information and does not constitute investment advice.

From HIMIAO Horizon · himiao.ai

DEEPSEEKV4.1-FLASHOPEN WEIGHTS

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