Inception: Mercury

Going away April 15, 2026

inception/mercury

Released Jun 26, 2025128,000 context

$0.25/M input tokens$0.75/M output tokens

Mercury is the first diffusion large language model (dLLM). Applying a breakthrough discrete diffusion approach, the model runs 5-10x faster than even speed optimized models like GPT-4.1 Nano and Claude 3.5 Haiku while matching their performance. Mercury's speed enables developers to provide responsive user experiences, including with voice agents, search interfaces, and chatbots. Read more in the [blog post] (https://www.inceptionlabs.ai/blog/introducing-mercury) here.

Providers for Mercury

OpenRouter routes requests to the best providers that are able to handle your prompt size and parameters, with fallbacks to maximize uptime.

Performance for Mercury

Compare different providers across OpenRouter

Effective Pricing for Mercury

Actual cost per million tokens across providers over the past hour

Apps using Mercury

Top public apps this month

Recent activity on Mercury

Total usage per day on OpenRouter

Prompt

3.61M

Completion

175K

Prompt tokens measure input size. Reasoning tokens show internal thinking before a response. Completion tokens reflect total output length.

Uptime stats for Mercury

Uptime stats for Mercury across all providers

Sample code and API for Mercury

OpenRouter normalizes requests and responses across providers for you.

OpenRouter provides an OpenAI-compatible completion API to 300+ models & providers that you can call directly, or using the OpenAI SDK. Additionally, some third-party SDKs are available.

In the examples below, the OpenRouter-specific headers are optional. Setting them allows your app to appear on the OpenRouter leaderboards.

Using third-party SDKs

For information about using third-party SDKs and frameworks with OpenRouter, please see our frameworks documentation.

See the Request docs for all possible fields, and Parameters for explanations of specific sampling parameters.

Mercury - API Pricing & Providers | OpenRouter