Retired model
Mercury 2.5 PreviewArchive and alternatives
Mercury 2.5 Preview is no longer available on OpenRouter. Explore a current alternative below.
Released August 31, 2026
Specifications
Mercury 2.5 Preview at a glance
Context
260K tokens
Max output
65.5K tokens
Input
Text
Output
Text
Input price
$0.20 / 1M
Output price
$0.75 / 1M
Tool callingStructured outputsReasoning support
Capabilities
What it is good at
Catalog capabilities
- Generates text responses
- Supports tool calling
- Supports structured outputs
Good for
Long documentsUse with toolsStructured responsesDeep analysis
Compare
Compare Mercury 2.5 Preview
Mercury 2.5 Preview vs Mercury 2
Mercury 2 is an extremely fast reasoning LLM, and the first reasoning diffusion LLM (dLLM).
Open comparisonMercury 2.5 Preview vs Mercury 2.5
Mercury 2.5 is the fastest reasoning LLM, and the latest diffusion LLM (dLLM) from Inception.
Open comparisonMercury 2.5 Preview vs Mercury Coder
Mercury Coder is the first diffusion large language model (dLLM).
Open comparisonFAQ
Questions about Mercury 2.5 Preview
Clear answers based on the model catalog and Krater access.
Mercury 2.5 Preview supports a context window of 260,000 tokens.