DeepSeek
DeepSeek V4
A genuinely open, MIT-licensed model with frontier-tier coding results — download the weights, fine-tune them, or just use the cheap hosted API.
DeepSeek V4 ships in two MIT-licensed variants — V4-Pro and V4-Flash — with weights published on Hugging Face. It’s a genuinely open model: download it, fine-tune it, or ship it in a product, not just call an API.
Why it stands out
- MIT-licensed, open weights — full control over hosting, fine-tuning, and deployment, unlike closed frontier models.
- Mixture-of-Experts architecture that activates only a fraction of total parameters per pass, keeping inference costs far below other frontier-adjacent models.
- 1M-token context window on both the Pro and Flash variants.
- Priced well under $1 per million tokens on either side of the request, an order of magnitude cheaper than most models on this list.
Good for
Teams that want frontier-adjacent coding quality without frontier pricing — or who need to self-host for cost, compliance, or data-residency reasons.