About DeepSeek V4 Flash
DeepSeek V4 Flash is the efficiency variant of the V4 family. The DeepSeek-V4-Flash-0731 build (July 31, 2026) keeps the same 284B total / 13B active MoE architecture as the April preview, with re-post-training that substantially improves agent, coding, and tool-use workloads. Supports a 1M-token context window, thinking and non-thinking modes, structured outputs, and tool use. Pairs naturally with V4 Pro: route the hard prompts to Pro, everyday and agent traffic to Flash.
| Metric | Value |
|---|---|
| Parameter Count | 284 billion (13 billion active) |
| Mixture of Experts | Yes |
| Active Parameter Count | 13 billion |
| Context Length | 1,048,576 tokens |
| Max Output | 384,000 tokens |
| Multilingual | Yes |
| Tool Use | Yes |
| Structured Outputs | Yes |
Ready to build with DeepSeek V4 Flash?
Try DeepSeek V4 Flash in the Workbench to prompt it, compare outputs, and iterate on prompts without writing any code. When you're ready to ship, call the same model from our API and build your own apps on top of it.
curl -sSf -X POST https://hub.oxen.ai/api/ai/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer $OXEN_API_KEY" \
-d '{
"model": "deepseek-v4-flash",
"messages": [
{
"role": "user",
"content": "Try sending a message."
}
]
}'API endpoint
See the API reference for request and response formats.
POST
https://hub.oxen.ai/api/ai/chat/completions