DeepSeek V4.1 Flash - MixRoute API

DeepSeek reasoning model with native visual understanding for coding, agents, and multimodal analysis.

Model Information

Field	Description
`model`	deepseek-v4.1-flash
`alias`	deepseek-flash
`context`	1M tokens
`max output`	384K tokens
`endpoint`	POST /v1/chat/completions

Context and output sizes describe the model specification. Effective request limits, availability, and billing depend on the MixRoute route.

Capabilities and Usage

Both deepseek-v4.1-flash and deepseek-flash are available model IDs; the rolling alias can change over time.
Supports thinking and non-thinking modes. Set thinking.type to enabled or disabled. In thinking mode, reasoning_effort supports low, high, or max; the default is high.
For new integrations, select this model explicitly instead of assuming older V4 aliases use the same snapshot on every route.

Request Example

Set MIXROUTE_API_KEY before making the request.

curl --request POST "https://api.mixroute.ai/v1/chat/completions" \
  --header "Authorization: Bearer $MIXROUTE_API_KEY" \
  --header "Content-Type: application/json" \
  --data '{
  "model": "deepseek-v4.1-flash",
  "messages": [
    {
      "role": "user",
      "content": "Explain the tradeoffs of database indexes."
    }
  ],
  "max_tokens": 1024
}'

Request Fields

Field	Description
`model`	Required. Use the exact model ID above.
`messages`	Required conversation messages with role and content.
`max_tokens`	Optional output-token budget.

Complete request format: chat-openai.