# Inception: Mercury 2.5

Provider: inception  
Category: llm  
Model ID: `inception/mercury-2.5`

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...

## Specs

- Context length: 260000 tokens
- Max output: 65536 tokens
- Modalities: text
- Released: 2026-09-08

## Pricing

- Input: $0.04 per million tokens
- Output: $0.15 per million tokens

## Providers

- **inception** — ctx 260000, input $0.04/M, output $0.15/M

## Verdict

Mercury 2.5 offers a massive 260K context window at bargain pricing — $0.04 input makes it one of the cheapest ways to process long documents. The trade-off is uncertainty: no public benchmarks means you're flying blind on reasoning quality and instruction-following compared to established models. Reach for this when cost and context length matter more than proven performance, or when you're willing to run your own evals.

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Last verified: 2026-10-19T02:30:34.239Z  
Canonical URL: https://switchy.build/directory/models/mercury-2-5