I
tested
all
three
on
the
same
12
content
assignments
last
month.
ChatGPT
shipped
faster
copy.
Claude
caught
logical
gaps
I
missed.
Gemini
produced
the
weakest
first
drafts
but
handled
constraint-heavy
rewrites
better
than
expected.
Here’s
what
each
actually
does
well.
The
Setup:
What
I
Tested
Three
tasks,
six
prompts
each,
same
input
constraints:
- Long-form
blog
post
(2,000
words,
SEO-focused) - Product
description
(150
words,
conversion-focused) - Email
sequences
(5
emails,
nurture
flow) - Social
copy
variations
(20
tweets
from
one
article) - Technical
explanation
(explain
a
complex
idea
to
a
non-technical
audience) - Constraint
rewrite
(existing
copy,
new
tone/length)
I’m
measuring:
speed
(time
to
usable
first
draft),
accuracy
(factual
errors),
structure
(logical
flow
without
prompting),
and
flexibility
(how
well
it
handles
edge-case
constraints).
ChatGPT
4o:
Fast,
Safe,
Predictable
ChatGPT
ships
polished
output
in
the
shortest
time.
On
product
descriptions
and
social
copy,
it
needs
almost
zero
revision.
The
copy
is
conversational,
punchy,
and
hits
brand
voice
easily
if
your
brand
is
