Inception: Mercury, launched on June 26, 2025, by Inception, is a diffusion large language model (dLLM) designed for text-to-text tasks. It features a substantial context window of 128,000 tokens, allowing for extensive input processing. Mercury employs a unique discrete diffusion approach, enabling it to operate 5-10 times faster than other optimized models like GPT-4.1 Nano. This efficiency makes it ideal for applications requiring quick responses, such as voice agents, search interfaces, and chatbots. With text as both its input and output modality, Mercury supports a range of parameters, including frequency penalty, max tokens, and temperature, providing developers with flexibility in tailoring outputs. Mercury's speed and performance make it a valuable tool for creating responsive and dynamic user experiences.
Use Cases
Here are a few ways teams apply Inception: Mercury in practice—from fast drafting to multimodal understanding. Adapt these ideas to your workflow.
Enhance chatbot responsiveness
Improve voice agent interaction
Optimize search interface speed
Develop dynamic text applications
Tailor outputs with flexible parameters
Key Features
A quick look at the capabilities that make this model useful in real projects.
Discrete diffusion approach for speed
128,000 token context window
Text-to-text modality
Supports diverse parameters
Responsive user experience
Released June 2025
Specs
Overview
Vendor
inception
Model ID
inception/mercury
Release
2025-06-26
Modalities & context
Input
text
Output
text
Context
128,000 tokens
Parameters & defaults
Supported parameters: frequency_penalty, max_tokens, presence_penalty, response_format, stop, structured_outputs, temperature, tool_choice, tools, top_k, top_p
Defaults: temperature 0, top_p 0.95
Benchmark tests: Inception: Mercury
We ran this model against a few representative prompts to show its range. Review the outputs below and be the judge.
Text
Prompt:
Write 150 words on how AI might positively upend work, leisure and creativity
Artificial Intelligence (AI) is poised to revolutionize work, leisure, and creativity in transformative ways. In the workplace, AI can automate routine tasks, freeing up human
Run this prompt on Upend.AI