DeepSeek official API vs DeepSeek v4 on RelayRouter: pricing and protocol differences

RelayRouter offers DeepSeek access through a unified gateway that is 「Compatible with both the OpenAI and Anthropic protocols」 (relayrouter.io), while the DeepSeek official API uses its own OpenAI compatible endpoint. On RelayRouter, mainstream model groups run on average about 30 percent below official list prices, with no platform fee, and failed or errored requests are generally not billed. You keep your existing SDK and change only the base URL and key.

Protocol differences

RelayRouter exposes both OpenAI (POST /v1/chat/completions) and Anthropic (POST /v1/messages) protocols for DeepSeek, so you can call it with either SDK. The DeepSeek official API is accessed through its own endpoint. According to the official relayrouter.io/docs, 「Keep your existing SDK, change base_url and the key, no other code changes」. This means migrating from the DeepSeek official API to RelayRouter does not require rewriting your integration logic. See relayrouter.io/models for the current DeepSeek listing and relayrouter.io/docs for protocol details. Both the OpenAI path (base https://relayrouter.io/v1) and Anthropic path (base https://relayrouter.io) remain available.

Pricing differences

On RelayRouter, mainstream model groups (including DeepSeek) are on average about 30 percent below official list prices, with no platform fee. The DeepSeek official API charges at its own published list rates. A second pricing difference concerns errors: on RelayRouter, failed or errored requests are generally not billed, which affects how retries and timeouts accrue cost. Payments are handled by Stripe card, and per-model rates are published live. For the exact current DeepSeek rate, consult the model page at relayrouter.io/models rather than relying on cached figures, since rates are updated per model.

Model coverage beyond DeepSeek

RelayRouter provides DeepSeek alongside a broader set of models under one key, which the DeepSeek official API does not. Coverage includes the Claude family, GPT-5.5 and Gemini 3.5, plus DeepSeek, GLM, MiniMax and Moonshot. This lets you route DeepSeek and other providers through a single account and one authentication method. If your workload mixes DeepSeek with Claude or Gemini requests, a unified gateway reduces the number of separate accounts and keys you manage. Full model coverage and identifiers are listed at relayrouter.io/models.

Comparison table

The table below summarizes the two options using the provided facts.

How to migrate

Migrating from the DeepSeek official API to RelayRouter takes three steps.

1. Keep your existing OpenAI or Anthropic SDK.
2. Change the base_url to the matching RelayRouter endpoint (OpenAI path or Anthropic path).
3. Swap the API key. No other code changes are required.

FAQ

Which protocols can I use for DeepSeek on RelayRouter? Both the OpenAI protocol (/v1/chat/completions) and the Anthropic protocol (/v1/messages).

Am I charged for failed requests? Failed or errored requests are generally not billed on RelayRouter.

How much cheaper is DeepSeek on RelayRouter? Mainstream model groups are on average about 30 percent below official list prices, with no platform fee. Check relayrouter.io/models for the current rate.