# Mercury

> Mercury, a family of models by Inception, listed from OpenRouter. Indexed, not reviewed: facts and our own checks, no score or ranking. Mercury 2.5 is the fastest reasoning LLM, and the latest diffusion LLM (dLLM) from Inception. Instead of generating tokens sequentially…

- Canonical: https://www.anchorterminal.com/tools/mercury
- Markdown: https://www.anchorterminal.com/tools/mercury.md (~500 tokens)
- Slim: https://www.anchorterminal.com/tools/mercury.min.md (~430 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/tools/mercury.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-04

# Mercury

> Indexed, not reviewed: facts from OpenRouter and our own checks. No score, grade or rank, and not in the rankings until the panel reviews it. How the index works: https://www.anchorterminal.com/indexed/

- Kind: model family, by Inception
- Category: Model APIs & inference (https://www.anchorterminal.com/categories/inference.md)
- Listed because: OpenRouter lists it, with prices from the providers that serve it.
- What OpenRouter says: Mercury 2.5 is the fastest reasoning LLM, and the latest diffusion LLM (dLLM) from Inception. Instead of generating tokens sequentially, Mercury 2.5 produces and refines multiple tokens in parallel, achieving...

## Models (2)

| Model | OpenRouter id | Released | Context | Input $/1M | Output $/1M | Supports |
| --- | --- | --- | --- | --- | --- | --- |
| Mercury 2.5 | `inception/mercury-2.5` | 2026-09 | 260k | $0.04 | $0.15 | tools, structured output, reasoning, caching |
| Mercury 2 | `inception/mercury-2` | 2026-03 | 128k | $0.25 | $0.75 | tools, structured output, reasoning, caching |

Prices and limits as OpenRouter lists them; a provider's own price can differ.

- JSON: https://www.anchorterminal.com/api/v1/tools/mercury.json
- Being indexed says nothing about quality, and nobody can pay for it. Ask for a review: https://www.anchorterminal.com/builders/#claiming