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DeepSeek releases two open-weight DeepSeek-V4 Preview models

DeepSeek released DeepSeek-V4-Pro and DeepSeek-V4-Flash with open weights, one-million-token context, agent integrations, API access, and lower-cost inference.

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CURRENT ASSESSMENT · REVISION 1
TOWARD DOOM56confidence 86/100

Why it moved the index

Open weights, low-cost API access, million-token context, and agent integrations materially diffuse capable models. Independent NIST evaluation tempers the developer's strongest capability claims.

Assessment history

  1. R1
    Toward 56 · confidence 86

    New exact open-weight model tiers with immediate API and agent integration.

    11 Aug 2026

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  1. DoomBench assesses “DeepSeek releases two open-weight DeepSeek-V4 Preview models” as evidence moving toward doom, with magnitude 56 and confidence 86 out of 100 in the competitive race category.

  2. The DoomBench assessment of “DeepSeek releases two open-weight DeepSeek-V4 Preview models” is based on reporting from DeepSeek and records the editorial rationale, source quality, attribution, and revision history.

  3. DoomBench summarizes “DeepSeek releases two open-weight DeepSeek-V4 Preview models” as follows: DeepSeek released DeepSeek-V4-Pro and DeepSeek-V4-Flash with open weights, one-million-token context, agent integrations, API access, and...

    https://www.doombench.com/news/deepseek-releases-two-open-weight-deepseek-v4-preview-models-2026-04-24