Mercury 2
Mercury 2 is an extremely fast reasoning LLM, and the first reasoning diffusion LLM (dLLM).
Specifications
| Lab | Inception |
|---|---|
| Context window | 128K tokens |
| Input price | $0.25/1M |
| Output price | $0.75/1M |
| Release | Mar 2026 |
Strengths
- First reasoning diffusion LLM parallel token generation
- Extremely fast inference via parallel refinement
- Novel architecture for reasoning tasks
- Competitive pricing
Weaknesses
- Experimental architecture with unknown edge cases
- Limited track record
- Narrower general knowledge vs traditional LLMs
Best for
- Latency-critical reasoning
- High-throughput classification
- Experimental LLM workflows
In Depth: Mercury 2
Summary
Mercury 2 is an AI model from Inception.
Released in Mar 2026. It currently appears in the Overall category on LMRank. It takes text input and produces text output, with a context window of 128K tokens. Input pricing is $0.25 per 1M tokens and output is $0.75 per 1M tokens on OpenRouter.