Inception: Mercury 2.5

proprietary

Mercury 2.5 is the fastest reasoning LLM, and the latest diffusion LLM (dLLM) from Inception.

Context
260K
Max output
66K
Input price
$0.04/1M tokens
Output price
$0.15/1M tokens

Capabilities

Reasoning & Interaction
Reasoning
Tool Calling
Output Control
Structured Output
JSON Mode
Infrastructure
Streaming

Details

Model IDinception/mercury-2.5
Provider OpenRouter
Creator Inception Labs
Family—
Licenseproprietary
Status—
Type—
Input modalitiestext
Output modalitiestext
Open weightNo
Parameters—
Architecture—
Context window260K tokens
Max input—
Max output66K tokens
Reasoning tokens—
Knowledge cutoff—
Release date
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs

Pricing

Input
$0.04
Output
$0.15
Cache write
—
Cache read
$0
Batch in
—
Batch out
—

API

GET/v1/models/openrouter/inception/mercury-2.5

Inception: Mercury 2.5

inception/mercury-2.5

Mercury 2.5 is the fastest reasoning LLM, and the latest diffusion LLM (dLLM) from Inception.

Changes · 2 entries
inception/mercury-2.5createca7a400Nov 2, 2026, 03:02 AM
inception/mercury-2.5create79684d6Sep 9, 2026, 06:38 AM