Mercury 2

Inception · Released March 2026

Mercury 2 is an extremely fast reasoning LLM, and the first reasoning diffusion LLM (dLLM).

It is part of Inception's Mercury line of diffusion language models, which generate tokens in parallel rather than sequentially and are built for speed.

Facts and pricing

Provider

Inception

Context window

128K tokens

Input price

3.0 credits / 1M tokens ($0.25 raw)

Output price

9.0 credits / 1M tokens ($0.75 raw)

Vision (image input)

No

Tool calling

Yes

Extended reasoning

No

Credits are what Zeplik bills: 1 credit = $0.10, computed from the raw provider rate with a 1.20x margin. Raw prices shown per 1M tokens.

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What Mercury 2 is best for

• Balanced everyday work: writing, questions, brainstorming and summarization
• Tool use and agents: reliably calls functions, so it can search, run skills and drive workflows

Example prompts

Prompts that suit a general purpose model like Mercury 2:

• Help me outline a talk about what I learned this year
• Compare these two paragraphs and tell me which is clearer and why
• Draft a polite reply declining this invitation
• Explain this concept with a concrete everyday analogy

Inception family

Frequently asked questions

What is Mercury 2?

Mercury 2 is an AI model by Inception. Mercury 2 is an extremely fast reasoning LLM, and the first reasoning diffusion LLM (dLLM).

How much does Mercury 2 cost on Zeplik?

Input tokens cost 3.0 credits per million and output tokens 9.0 credits per million (1 credit = $0.10; the raw provider rates are $0.25 and $0.75 per million). New accounts start with free credits.

How long can a conversation with Mercury 2 be?

Mercury 2 has a 128K-token context window (128,000 tokens), which covers the conversation plus any documents you attach.

Does Mercury 2 support images and tools?

Mercury 2 is text-only and supports tool calling.

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