Inception: Mercury Coder

inception/mercury-coder

Released Apr 30, 2025128,000 context

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

Mercury Coder 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 Claude 3.5 Haiku and GPT-4o Mini while matching their performance. Mercury Coder's speed means that developers can stay in the flow while coding, enjoying rapid chat-based iteration and responsive code completion suggestions. On Copilot Arena, Mercury Coder ranks 1st in speed and ties for 2nd in quality. Read more in the blog post here.

Providers for Mercury Coder

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 Coder

Compare different providers across OpenRouter

Effective Pricing for Mercury Coder

Actual cost per million tokens across providers over the past hour

Apps using Mercury Coder

Top public apps this month

Recent activity on Mercury Coder

Total usage per day on OpenRouter

Prompt

8.75M

Completion

1.13M

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

Uptime stats for Mercury Coder

Uptime stats for Mercury Coder across all providers

Sample code and API for Mercury Coder

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 Coder - API Pricing & Providers | OpenRouter