DeepSeek V4 Flash

deepseek/deepseek-v4-flash-0731

DeepSeek V4 Flash is a 284B mixture-of-experts model activating roughly 13B parameters per token, with a 1M context window. It uses compressed latent attention, so a very long prompt costs far less memory than its length suggests. Built for work that needs a whole corpus in one pass — repository-wide code analysis, long document synthesis and multi-step reasoning over large inputs.

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Endpoints

Each row is one provider serving these weights at one precision. Prices are per million tokens.

Quantisation	Context	Max out	Input	Output	Cached in
Undisclosed	1024K	32K	$0.10	$0.20	$0.02

Agent config

Paste this into your coding agent and it can configure itself. The timeout is derived from this variant's measured throughput, not a guess — a long generation that outlives a client's default ceiling is the most common way a working request looks broken.

# Infersia — deepseek/deepseek-v4-flash-0731
# Paste this to your agent. Values are measured, not aspirational.

provider:
  type: openai-compatible
  base_url: https://api.infersia.com/v1
  api_key: ${INFERSIA_API_KEY}   # from https://infersia.com/dashboard/keys
  model: deepseek/deepseek-v4-flash-0731

limits:
  max_input_tokens: 1048576      # hard limit — over this returns HTTP 413
  max_output_tokens: 32768
  timeout_seconds: 1170                  # covers the full 32768 output budget at 57 tok/s, doubled for the tail
  # allow ~36s per 1,000 output tokens if you cap max_tokens lower

features:
  streaming: true
  tools: false
  vision: false
  reasoning: false
  prompt_caching: false

pricing_usd_per_million_tokens:
  input: 0.1
  output: 0.2
  cached_input: 0.02

What Undisclosed means

This model is served on capacity we buy rather than hardware we operate, so we cannot verify the precision it is served at. We would rather say that than print a figure we are guessing at.

Call it

curlbash

curl https://api.infersia.com/v1/chat/completions \
  -H "Authorization: Bearer $INFERSIA_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "deepseek/deepseek-v4-flash-0731",
    "messages": [{"role": "user", "content": "Hello"}],
    "stream": true
  }'

Pin a provider with deepseek/deepseek-v4-flash-0731@infersia, or take the cheapest with the bare id. Add :free for the rate-limited free tier where one exists.