Model Details
About
DeepSeek: DeepSeek V4 Flash 0731 is a chat model built by DeepSeek. It accepts up to 1M tokens of context per request. Routed through external models — ~173 tokens per message (50% markup over upstream cost).
Use via API
curl https://api.free.ai/v1/chat/ \
-H "Authorization: Bearer YOUR_KEY" \
-d '{"model":"deepseek/deepseek-v4-flash-0731"}'
Compare
FAQ
DeepSeek: DeepSeek V4 Flash 0731 is a chat model built by DeepSeek. It accepts up to 1M tokens of context per request. Routed through external models — ~173 tokens per message (50% markup over upstream cost).
DeepSeek: DeepSeek V4 Flash 0731 works well for general conversation, writing assistance, brainstorming, code help, and analysis. Try the sample prompts above to see its style.
About 173 tokens per average message. Free accounts get a 30,000-token daily pool that covers self-hosted chat; premium models are pay-as-you-go, with token top-ups from $1.
It depends on the task. /chat/compare/ lets you send the same prompt to DeepSeek: DeepSeek V4 Flash 0731 and any other model side-by-side — comparison is the fastest way to decide.
Yes. Outputs are yours — Free.ai does not claim rights to anything you generate.
1,048,576 tokens.
Replies stream token-by-token within ~1 second. Total response time depends on length and model size — small models stream faster, frontier models trade speed for depth.
Yes. Signed-in users see every chat in /account/?tab=history. You can also share a one-link copy of any conversation via the Share button.
Free.ai does not train models on your conversations. Self-hosted models stay on our GPUs. Premium models route to the upstream provider for inference.
Yes. POST to /v1/chat/ with model="deepseek/deepseek-v4-flash-0731" and a messages array. Streaming SSE is supported. Full reference: /api/.
DeepSeek: DeepSeek V4 Flash 0731 is a premium model served by an external provider, so self-hosting is not available. Free.ai exposes it through token-based pricing.
Free accounts get a 30,000-token daily pool. When that runs out, token top-ups start at $1, pay-as-you-go — no subscription required.