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#157

Mercury 2.5

Inception Release: 2026-09-08 Tested on: 2026-09-08 22:50 inception/mercury-2.5::medium
~100BOtherClosedEstimated
(high) (medium) (low) (none)

Summary

Mercury 2.5 scores 6.8 on AI BENCHY and ranks #157. It has 9.8 reliability, a 65.2% pass rate, $0.022 total cost, and 3.19s average response time.

What makes Mercury 2.5 unique: Its total benchmark cost is unusually low for its score range.

Model facts

Researched on 2026-09-08

Estimated
Parameters
~100B
Architecture
Other
Availability
Closed
License
-

Best estimate from public evidence; the vendor did not disclose every value. Inception identifies Mercury 2.5 as a diffusion LLM but does not disclose its parameter count or topology. The low-confidence 100B estimate follows the existing Mercury family records; it is not a vendor-reported count.

Parameter source Availability source

Score

6.8

Consistency

8.6

Reliability

9.8

Total Cost (Current Price)

$0.022

Total Output Tokens

120,129

Total Input Tokens

91,402

Input Price

$0.040 / 1M

Output Price

$0.150 / 1M

Tests Correct

Wrong Tests: 10

Attempt pass rate: 65.2%

Flaky tests

4

Flaky tests had mixed outcomes across runs (at least one pass and one fail).

Response Time (avg)

3.19s

Response Time (max): 9.87s

Response Time (total): 70.18s

Wrong answer: 9 API error: 1

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#157 Mercury 2.5

medium
Cost
$0.001
Time
3.8s
Tokens
3,386 tok

Charts

Choose the first model, then click a second model to open a side-by-side page.

Total Output Tokens

Score vs Total Output Tokens

Quick Compare

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Category Breakdown

Category Score Consistency Tests Correct
Anti-AI Tricks 10.0 10.0
Coding 5.0 5.1
Combined 6.5 10.0
Data parsing and extraction 10.0 10.0
Domain specific 3.6 7.2
General Intelligence 4.4 9.9
Instructions following 6.4 6.0
Puzzle Solving 10.0 10.0
Tool Calling 10.0 10.0
Trivia 3.0 10.0

Compared models