DEEPSEEK V4 · VISION / FLASH / PRO

Choose Flash Vision for images, Flash for speed, and Pro for depth

OK-API provides DeepSeek V4 Flash Vision, Flash, and Pro through one gateway. Add image understanding when needed, while keeping fast text and complex reasoning paths under the same API key.

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Flash

High-throughput path

Pro

Complex-task path

Context window

Vision

Image understanding

V4 Flash Vision

Use the experimental multimodal Flash route for screenshots, diagrams, photos, and document images. It supports image inputs through Chat Completions and Responses, plus reusable uploads through the Files API.

Model ID: deepseek-v4-flash-vision-exp
Accepts image URLs and file-backed inputs
Image understanding, not image generation

V4 Flash

Start with Flash for interactive coding, batch processing, tool-chain debugging, and cost-sensitive workloads. It is a practical way to validate authentication, stream aggregation, and tool arguments before increasing reasoning depth.

Model ID: deepseek-v4-flash
Suited to frequent iteration and concurrent work
Supports thinking, JSON output, and tools

V4 Pro

Use Pro for complex reasoning, long-horizon planning, and demanding agent tasks. Evaluate more than a single answer: measure task completion, tool recovery, latency, and total token use.

Model ID: deepseek-v4-pro
Suited to complex codebases and long agent runs
Supports high and max reasoning effort

Long context is not unlimited memory

A 1M-token window can hold more code and documentation, but relevant context selection, stable prefixes, and duplicate control still matter. Harness can help organize context and session state.

Select context for the current task
Keep cacheable prefixes stable
Compress irrelevant history and verbose tool output

Route using real tasks

Choose a default model from evidence in your own repositories. Track completion rate, first-pass correctness, latency, and total cost, then define an explicit escalation path for difficult or failed tasks.

Use Flash as the fast default path
Escalate difficult tasks to Pro
Pin models and versions for critical workflows

FAQ

Frequently asked questions

What are the DeepSeek V4 model IDs?+

OK-API exposes deepseek-v4-flash-vision-exp, deepseek-v4-flash, and deepseek-v4-pro. Call /v1/models to confirm which models are enabled for your account.

Can all three models run in DeepSeek Harness?+

Yes. Declare Flash Vision, Flash, and Pro in a custom provider and switch between them from the Harness model selector.

Should I send an entire repository into a 1M-token window?+

Usually not. Larger inputs increase latency and cost and can add noise. Prefer context relevant to the current task.

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