KeyoAPI
DeepSeek V4 Pro on KeyoAPI — How to Call, Price & Free Tier
DeepSeek V4 Pro is the flagship twin in KeyoAPI’s DeepSeek family: stronger chat and reasoning than Flash, billed by token on the paid bare ID.
Overview
DeepSeek V4 Pro is the flagship twin in KeyoAPI’s DeepSeek family: stronger chat and reasoning than Flash, billed by token on the paid bare ID. If you landed here from a deepseek v4 pro discussion thread, you probably already know the model story. What you need next is operational clarity — the exact model ID, what $0 means on this relay, and how Keyo pricing compares when you refuse to open a second vendor wallet. On KeyoAPI, deepseek-v4-pro is OpenAI-compatible. Point baseURL to https://www.keyoapi.xyz/v1, authenticate with a Bearer key, and send chat completions like any other GPT-class client. Indicative sell rates are about $3.30 per 1M input and $9.90 per 1M output. Confirm live numbers on /pricing/deepseek-v4-pro. The permanent free twin deepseek-v4-pro-free keeps ModelPrice at $0 with fair-use limits on the Keyo Free channel — ideal for demos and evals, not as a silent production SLA. Search reality check: bare queries like deepseek v4 pro attract huge discussion volume, but SERPs are crowded with official docs, Hugging Face spaces, and community reviews. A relay site should not pretend to outrank those on brand intent alone. Instead this page answers the conversion questions those threads skip: How do I call it from an existing OpenAI SDK? What is the free ID? When do I pay? Where is the family pricing table? For purchase-intent pricing queries, see /deepseek-api-pricing — that page is built to compete on deepseek api pricing rather than model-name chatter. Product teams use Pro for denser coding agents, bilingual research assistants, and tickets that previously needed a heavier Claude-class model. Cost-sensitive services keep Flash as the default and escalate to Pro when quality gates fail. Because both IDs share one Keyo balance with Whisper, OCR, and Gemini-class models, you can A/B without provisioning five upstream accounts. Integration checklist: create an account, mint a key, try deepseek-v4-pro-free with a five-line curl, measure latency and quality on your eval set, then switch to deepseek-v4-pro for production. Pair with /free-models for the full $0 list and /model/deepseek-v4-flash for the cheaper sibling. Keep monitoring /pricing for catalog moves — relay sell rates track upstream cost and can change. In short: DeepSeek V4 Pro on KeyoAPI is a practical how-to and pricing bridge for developers who already chose the model and now need a single OpenAI-compatible key — with an honest free tier and a clear paid twin.
Free tier available
Same model family on KeyoAPI: use deepseek-v4-pro-free for permanent $0 fair-use calls (Keyo Free channel), or deepseek-v4-pro for token-metered production traffic.
Rules: free = *-free suffix; paid = bare ID. Fair-use rate/concurrency limits apply on free — see /free-models.
Free curl
curl https://www.keyoapi.xyz/v1/chat/completions \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"deepseek-v4-pro-free","messages":[{"role":"user","content":"Hello"}]}'Paid curl
curl https://www.keyoapi.xyz/v1/chat/completions \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"deepseek-v4-pro","messages":[{"role":"user","content":"Hello"}]}'Quick start
Base URL: https://www.keyoapi.xyz/v1
Endpoint: POST /v1/chat/completions
Model: model=deepseek-v4-pro
curl https://www.keyoapi.xyz/v1/chat/completions \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"deepseek-v4-pro","messages":[{"role":"user","content":"Explain DeepSeek V4 Pro vs Flash"}]}'Auth uses the same Bearer API key as chat. Full notes: Keyo docs.
FAQ
What model string should I use for DeepSeek V4 Pro?
Paid: deepseek-v4-pro. Free fair-use: deepseek-v4-pro-free. Both hit POST /v1/chat/completions on https://www.keyoapi.xyz/v1.
Pro vs Flash — which should I ship?
Pro is the stronger reasoning/chat twin at higher token rates. Flash is cheaper and faster for high-volume or latency-sensitive paths. Many teams run Flash in the hot path and Pro for harder tickets.
Will this page rank #1 for “deepseek v4 pro”?
Unlikely for a new DR0 site against Hugging Face, official docs, and Reddit. This guide exists so engineers who already want DeepSeek on a relay can copy IDs, compare free vs paid, and link into Keyo pricing.