I have had good results from Deepseek V4 Flash 0731, but the way I use it is:
- Let deepseek take a first pass
- Have a second agent review
Also GPT 5.6 Luna is also well priced and for smaller context behaves similar to Terra at high reasoning.
If budget is tight I would say Deepseek Flash implement and Luna review.
Model diversity, at least on my experience, leads to better results. Also, have found the GPT family of models seem to do well as reviewers (at least on my testing / use cases seem to do better on reviewing that coding).
paid version of DeepSeek
If you meant using the Deepseek company plan vs just using their model, I have not used it directly from Deepseek. I use OpenRouter / Venice.ai.