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Model components / Fine-tuned / chat models

DeepSeek-V4-Pro / V4-Flash

DeepSeek

DeepSeek's open-weight April 2026 flagship line, replacing the previous V3 generation, with a one-million-token default context and up to 384K output. It is reached through the deepseek-chat and deepseek-reasoner aliases as well as weights published on Hugging Face.

A compound record. The V4-Pro flagship is a frozen anchor on the base_pretrained shelf and is not rescored here; this record scores the lighter V4-Flash sibling, a 284B mixture-of-experts with 13B active parameters. Verified 2026-08-13 via the DeepSeek-V4-Flash model card.

Openness

3 high confidence
3.0
weights
open(MIT, on HF)
data
closed
code
partial(inference/serving
license
MIT(OSI-style permissive, no use restrictions)

V4-Flash weights are MIT-licensed and downloadable, matching the V4-Pro flagship, while the training data and code stay closed - open weights rather than open source, on the same rung V4-Pro sits on.

  • https://huggingface.co/deepseek-ai/DeepSeek-V4-Flash recorded 2026-08-13

    License section - "This repository and the model weights are licensed under the MIT License"; `license:mit` in the repo tags and `"gated":false` in the embedded repo state, so the 284B-A13B FP4+FP8 weights download without a barrier; encoding and local-inference folders only, with the post-training pipeline described but not released and no SFT/RL mixture published

Adoption

4 high confidence
4.0

V4-Flash reads 2,213,519 Hugging Face downloads in the trailing 30 days and the declared V4-Pro repository reads 1,385,596, so both sit inside the 1M-10M band and the level holds whichever SKU the tier is read on. Flash is the cheaper, faster sibling of V4-Pro and attractive for self-hosting, which is what drives the volume.

Capability

4 medium confidence
4.0

Near-frontier capability (MMLU-Pro 86.2, LiveCodeBench 91.6) but deliberately the lighter sibling of the V4-Pro anchor (capability 5); placed at 4 to keep the family curve consistent - Flash trails Pro. Figures DeepSeek-reported on the HF card.

Verified 2026-08-13