Under the hood

How Marginal actually works

A little sharper, every day — here's the system making that happen.

Every quiz here is generated, checked, and corrected by a small pipeline of AI agents — not one model guessing. Here's what that pipeline actually does, in real numbers.

Notice something off, or have an idea for what's next? We'd like to hear it.
18 Quizzes generated
94.7% Approval rate
$0.0345 Avg. cost per quiz
119.8s Avg. generation time
The pipeline

Two paths in, one set of checkpoints

Marginal pipeline architecture

Quiz generation pipeline

Guardrail
Filters input and source
$0.0011 · 1.5s
5.8K in · 58 out
Creator
Generates questions
$0.0024 · 57.9s
5.9K in · 4.0K out
Structural
Verifies format
no LLM call
Safety
Checks phrasing and tone
$0.0061 · 5.0s
3.4K in · 50 out
Evaluator
Checks accuracy
$0.0118 · 10.4s
8.7K in · 1.4K out
if needed
Corrector
Fixes flagged issues
$0.0348 · 93.7s
8.0K in · 5.7K out

Daily digest pipeline

38 digests generated
$0.1213 avg. cost per digest
15.1 avg. ministries approved
191s avg. generation time
Filter
$0.0023
3129 in · 1316 out
Relevance Filter
$0.0028
3121 in · 1718 out
Summarize
$0.0085
52769 in · 7956 out
Evaluate
$0.1078
59134 in · 16930 out
1845 articles ingested
→
992 included in digests
→
853 filtered out

Topics to Preview pipeline

6 briefs generated
$0.0023 avg. cost per brief
10.9s avg. generation time
81 questions explained
81 explained
→
16 skipped (insufficient context)
Self-correction

The system catches its own mistakes

52.6% of quizzes were approved on the very first attempt. Of the rest, 42.1% were automatically fixed by our Corrector agent before approval. Only 5.3% were rejected by design (blocked or exhausted).

First try (10) Self-corrected (8) Failed (1)
Safety

What gets caught, and where

Guardrail (input checks)

off_topic1

Safety-check (output tone)

No issues caught yet.

The funnel

Every quiz passes through five checkpoints

Submitted
19
Passed Guardrail
18
Passed Structural Check
18
Passed Safety Check
18
Approved
18
Growth

Cumulative quizzes generated

Total quizzes
18
Today
0
Real feedback

What people actually think

4.2 average, from 12 reviews (66.7% response rate)
5 stars
4
4 stars
6
3 stars
2
2 stars
0
1 star
0

Did it follow instructions?

Yes6
Somewhat6
No0
N/A0

Reports filed

No reports filed yet.