Author's Description
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](https://www.inceptionlabs.ai/introducing-mercury).
Key Specifications
Supported Parameters
This model supports the following parameters:
Features
This model supports the following features:
Performance Summary
Inception: Mercury Coder, launched on April 30, 2025, is a groundbreaking diffusion large language model (dLLM) that consistently performs among the fastest models, ranking in the 99th percentile for speed across various benchmarks. It also offers competitive pricing, typically providing cost-effective solutions (62nd percentile), and demonstrates exceptional reliability with minimal technical failures (98th percentile). Across benchmark categories, Mercury Coder showcases remarkable speed, securing top 3 positions in Coding, Email Classification, and General Knowledge, and achieving #1 in Reasoning and Ethics, where it is noted as a "Speed champion" with near-perfect accuracy. While its speed is a clear strength, its accuracy varies. It achieved 80.0% in Coding (50th percentile) and 58.0% in Reasoning (49th percentile), indicating average performance in these areas. Its 92.0% accuracy in Email Classification, however, places it at the 21st percentile, suggesting a relative weakness in this specific classification task despite its speed. Conversely, it excels in Ethics (98.0% accuracy) and General Knowledge (93.5% accuracy), demonstrating strong capabilities in these domains. Its breakthrough discrete diffusion approach enables 5-10x faster operation than speed-optimized competitors, making it highly appealing for rapid iteration and responsive code completion.
Model Pricing
Current Pricing
Feature | Price (per 1M tokens) |
---|---|
Prompt | $0.25 |
Completion | $1 |
Price History
Available Endpoints
Provider | Endpoint Name | Context Length | Pricing (Input) | Pricing (Output) |
---|---|---|---|---|
Inception
|
Inception | inception/mercury-coder-small-beta | 128K | $0.25 / 1M tokens | $1 / 1M tokens |
Benchmark Results
Benchmark | Category | Reasoning | Free | Executions | Accuracy | Cost | Duration |
---|
Other Models by inception
|
Released | Params | Context |
|
Speed | Ability | Cost |
---|---|---|---|---|---|---|---|
Inception: Mercury | Jun 26, 2025 | — | 128K |
Text input
Text output
|
★★★★★ | ★★★ | $$$$$ |