Mercury

mercury Tool Calling Structured Output

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 2

Released Jun 26, 2025

Input Modalities text

Output Modalities text

Tarsk Use coding

Available Providers (2)

Provider	Model ID	Input Cost	Output Cost	Context	Max Output	Docs
Inception	`mercury`	$0.25/MTok	$1.00/MTok	128K	16.4K
OpenRouter	`inception/mercury`	$0.25/MTok	$0.75/MTok	128K	32K

Capabilities

Reasoning

Tool Calling

Attachments

Open Weights

Structured Output