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DeepSeek updated V4.1 Flash; Search and Fetch are $0.75 per 1,000 successful requests each

DeepSeek's API docs on 17 October 2026 list DeepSeek-V4.1-Flash-1017 at unchanged prices and a Search and Fetch API built on its own search engine.

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Check our sources · 11 facts from 3 sources

DeepSeek's API updates page, dated 17 October 2026, says V4.1 Flash has been upgraded to DeepSeek-V4.1-Flash-1017. API calling and pricing are unchanged, and developers keep using the deepseek-flash model name. The page gives DeepSeek's own benchmark figures, including 42.6 on HLE without tools and 77.0 on DeepSWE v1.1.

The pricing page lists deepseek-flash with a 1M context length, vision support, and off-peak prices of $0.15 per million input tokens on a cache miss and $0.60 per million output tokens. Peak rates, on weekdays at 01:00 to 04:00 and 06:00 to 10:00 UTC, are twice that.

DeepSeek lists a Search and Fetch API of two POST endpoints on its API host. Each costs $0.75 per 1,000 successful requests. Calls made through DeepSeek Harness, Claude Code or Codex are free until billing starts at 00:00 Beijing time on 1 November 2026.

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1 DeepSeek API updatesDeepSeek · 17 Oct 2026 · 5 facts Open the source archived copy

  1. DeepSeek's API updates page, dated 2026-10-17, says DeepSeek V4.1 Flash has been upgraded to DeepSeek-V4.1-Flash-1017.

    DeepSeek V4.1 Flash has been upgraded to DeepSeek-V4.1-Flash-1017.
    cite

  2. The updates page says API calling and pricing are unchanged and developers use the model name deepseek-flash.

    The API calling method and pricing remain unchanged.
    cite

  3. DeepSeek's own figures: the updates page lists 42.6 on HLE without tools (44.0 on the pure-text subset) and 77.0 on DeepSWE v1.1 for the new version. The page does not label a V4.1 baseline in that entry, so do not run a comparison with V4.1. the company says

    Toned down to what the source says
    HLE (w/o tools) 42.6 (44.0*); DeepSWE v1.1 77.0
    cite

  4. The updates page says the DeepSeek-V4.1-Flash-1017 update reduced task runtime and output length.

    reduced the model's task runtime and output length
    cite

  5. The updates page says DeepSeek's web and API search run on its in-house search engine.

    powered by our in-house DeepSeek search engine
    cite
2 Models and pricingDeepSeek · 4 facts Open the source archived copy

  1. The pricing page lists deepseek-flash as DeepSeek-V4.1-Flash-1017 with a 1M context length and vision supported.

    DeepSeek-V4.1-Flash-1017 1M
    cite

  2. The pricing page lists deepseek-flash off-peak input at $0.15 per 1M tokens on a cache miss and output at $0.60 per 1M tokens.

    Input (cache miss) $0.15; Output $0.6 (per 1M tokens, off-peak)
    cite

  3. The pricing page lists peak hours as 01:00-04:00 and 06:00-10:00 UTC, Monday through Friday excluding Chinese public holidays, and says off-peak rates are half of peak rates.

    Peak hours are 01:00 - 04:00 and 06:00 - 10:00 UTC, Monday through Friday, excluding Chinese public holidays. Off-peak rates are half of the peak rates.
    cite

  4. The pricing page says Search and Fetch calls made server-side through DeepSeek Harness, Claude Code or Codex are currently free and per-request billing starts at 00:00 Beijing time on November 1, 2026.

    These calls are currently free of charge; per-request billing starts at 00:00 Beijing time on November 1, 2026.
    cite
3 Search and Fetch API guideDeepSeek · 2 facts Open the source archived copy

  1. The Search and Fetch guide gives the endpoints as POST /v1/tools/search and POST /v1/tools/fetch, under DeepSeek's API host.

    Toned down to what the source says
    POST https://api.deepseek.com/v1/tools/search / POST https://api.deepseek.com/v1/tools/fetch
    cite

  2. The Search and Fetch guide prices Search at $0.75 per 1,000 successful requests and Fetch at $0.75 per 1,000 successful requests.

    Per 1,000 successful requests $0.75
    cite

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