Agent-based coding tools can be useful when a task requires exploring a repository, using tools, or applying a series of changes. That approach also involves repeated file reads and tool calls, which can add context and API usage even for a small question.
For a narrower review, a simpler workflow may be sufficient: select the relevant code, describe the question, and review the response before deciding whether to make a change. This keeps the context limited to what is relevant to the question.
DeepSeek V4-Flash is one option for this kind of workflow. With your own API key, you can use it for code explanations, debugging questions, or a review of a selected function. The response is a suggestion only; you remain responsible for evaluating and applying any change.
This is not intended to replace agent tools. A repository-wide task, an automated migration, or a multi-step implementation may benefit from tools that can inspect more of the project. A focused review is different: it benefits from a smaller amount of context and a clear question.
The appropriate choice depends on the task, the model, the available budget, and how much control you want over the context sent to the model.