DeepSeekText / ChatDeepSeek V4 Flash API: DeepSeek's chat / LLM model, one key away
DeepSeek V4 Flash via the ApexApi gateway
The fast DeepSeek tier, roughly three times cheaper than Pro while keeping the million-token window. Among the lowest costs per long-context call in the catalog. Call it through ApexApi's unified, OpenAI-compatible API with one `ak-` key, alongside every other model in the catalog. It supports a 1,048,576-token context window, tool / function calling, and streaming responses. Pricing is $0.17 input and $0.34 output per 1M tokens, billed pay-per-use from your credit balance with no subscription.
DeepSeek V4 Flash is served through ApexApi's unified, OpenAI-compatible API. One key, one format, with smart routing and automatic failover. Provider: DeepSeek.
Why DeepSeek V4 Flash
1,048,576-token context
Reason over long documents, codebases, and multi-turn history in a single request.
Tool & function calling
Structured outputs and tool orchestration for agentic and automation workloads.
OpenAI-compatible
Drop-in with any OpenAI SDK. Change the base URL and key, keep your code.
Specifications
- Modality
- chat
- Context window
- 1048.6K tokens
- Max output
- 384K tokens
- Streaming
- Yes
- Tool / function calling
- Yes
- Vision input
- —
DeepSeek V4 Flash: measured reliability
From real calls ApexApi made to DeepSeek V4 Flash during health sweeps over the last 30 days. Our own measurements, not vendor claims.
- Success rate
- 100%
- Avg latency
- 4.5s
- Calls measured
- 1
- Last checked
- Aug 30
See how DeepSeek V4 Flash compares against every model we serve on the model rankings.
DeepSeek V4 Flash pricing
- A million tokens in and a million out costs $0.50 here, all-in.
- That makes it the 5th cheapest of the 81 chat models we serve, ranked on output price.
- It runs 3.1× cheaper than DeepSeek V4 Pro, the pricier option from the same maker.
Getting started with DeepSeek V4 Flash
OpenAI-compatible. Point your client at ApexApi, swap your key, and call it. No new SDK to learn.
from openai import OpenAI
client = OpenAI(
base_url="https://api.apexapi.dev/v1",
api_key="<YOUR_APEXAPI_KEY>",
)
response = client.chat.completions.create(
model="deepseek/deepseek-v4-flash",
messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)DeepSeek V4 Flash use cases
What teams build with DeepSeek V4 Flash on ApexApi.
Agents & automation
Tool-using agents that orchestrate multi-step workflows and call APIs.
Coding assistants
Code generation, refactoring, reviews, and multi-file reasoning.
RAG & knowledge apps
Summarization and long-document Q&A grounded in your own data.
DeepSeek V4 Flash vs other models
How it compares, and on ApexApi you can switch between any of them with a single string change, same key, same endpoint.
DeepSeek V4 Flash vs Claude Opus 4.7
Compare DeepSeek V4 Flash against this model on price, capabilities, and latency. A/B them with a single key on ApexApi.
Learn more about Claude Opus 4.7 API →DeepSeek V4 Flash vs GPT-5.5
Compare DeepSeek V4 Flash against this model on price, capabilities, and latency. A/B them with a single key on ApexApi.
Learn more about GPT-5.5 API →DeepSeek V4 Flash vs Gemini 3.1 Pro Preview
Compare DeepSeek V4 Flash against this model on price, capabilities, and latency. A/B them with a single key on ApexApi.
Learn more about Gemini 3.1 Pro Preview API →DeepSeek V4 Flash API: FAQ
How do I call DeepSeek V4 Flash through ApexApi?
Create an ApexApi key, point your client at https://api.apexapi.dev/v1, and POST to /v1/chat/completions with the model set to `deepseek/deepseek-v4-flash`. The API is OpenAI-compatible, so an existing OpenAI SDK works once you change the base URL and key.
How much does DeepSeek V4 Flash cost on ApexApi?
$0.17 per million input tokens and $0.34 per million output tokens, all-in with no separate platform fee. You buy credits and pay per call, with no subscription or minimum.
What is the context window for DeepSeek V4 Flash?
1,048,576 tokens. It can return up to 384,000 tokens in a single response.
Does DeepSeek V4 Flash support tool calling and image input?
DeepSeek V4 Flash supports tool / function calling and streaming responses, and it does not support image (vision) input.
What should I use instead of DeepSeek V4 Flash?
From the same maker, DeepSeek V4 Pro is the step up when this one falls short. Switching is one string: it runs on the same endpoint and the same key, so there is nothing to re-integrate.
Ready to build with DeepSeek V4 Flash?
One API key. Every major AI model. Pay only for what you use.
Get your API key, free to start