Model detail
DeepSeek-V4-Flash-0731
DeepSeek V4 Flash is an efficiency-optimized Mixture-of-Experts model from DeepSeek with 284B total parameters and 13B activated parameters, supporting a 1M-token context window. It is designed for fast inference and high-throughput workloads, while maintaining strong reasoning and coding performance. The model includes hybrid attention for efficient long-context processing. Reasoning efforts `high` and `xhigh` are supported; `xhigh` maps to max reasoning. It is well suited for applications such as coding assistants, chat systems, and agent workflows where responsiveness and cost efficiency are important.
Model specs
- Model ID
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deepseek-v4-flash
- Context length
- 1M
- Max output
- 384K
- I/O modalities
- Released
- 2026-04
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API endpoints
One MixRoute gateway, OpenAI-compatible
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OpenAI-compatible
/v1/chat/completionsPOST
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Pricing
Flat rate, unit: /1M Tokens
Input
$0.1400 /1M Tokens
Completion
$0.2800 /1M Tokens
Cache read
$0.0028 /1M Tokens
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Selection summary
Quickly judge whether it fits your workload
What is this model good for?
Flagship model for complex reasoning and agentic workflows
DeepSeek-V4-Flash-0731: The official release of the DeepSeek-V4-Flash API is now in public beta. The API calling method remains unchanged — simply set the model name to deepseek-v4-flash to use the latest. 1,000,000-token context.
What should you check before using it?
1,000,000 context, 384,000 output, text
Deepseek model. Supports tool calling and structured outputs. Knowledge cutoff: 2025-05.
Why use it through MixRoute?
Drop-in via OpenAI-compatible endpoint on MixRoute
Set the model parameter to "deepseek-v4-flash" and use your MixRoute API key.
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Capabilities & compatibility
Unconfirmed capabilities stay "Unknown," no guesses
Tool calling
DeepSeek-V4-Flash-0731 supports function and tool calls.
tools definition; the response returns tool_calls to execute and feed results back.
Structured output
DeepSeek-V4-Flash-0731 can produce JSON-formatted output on demand.
response_format: { type: "json_schema" } forces valid JSON output.
Streaming
DeepSeek-V4-Flash-0731 supports streamed responses.
stream: true streams tokens incrementally, so chat UIs render as they arrive.
Prompt caching
DeepSeek-V4-Flash-0731 supports prompt caching under supported routing conditions.
OpenAI SDK
Call DeepSeek-V4-Flash-0731 through MixRoute's OpenAI-compatible endpoint.
base_url to https://api.mixroute.ai/v1; everything else follows the OpenAI style.
08
Token cost estimator
Live estimate from this page's pricing, not an actual bill
Share of the same prefix read repeatedly, up to 100%
09
FAQ
DeepSeek-V4-Flash-0731: DeepSeek V4 Flash is an efficiency-optimized Mixture-of-Experts model from DeepSeek with 284B total parameters and 13B activated parameters, supporting a 1M-token context window. It is designed for fast inference and high-throughput workloads, while maintaining strong reasoning and coding performance.
One endpoint, a testable decision
Test this model and alternate routes with the same request format
Start from a real workload, then let quality, total cost, and failure conditions decide whether to send production traffic.