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FitForTool

Job 12 · Not yet tested

Best draft of a blog post or email in my voice?

Writing tools given one brief and two samples of a voice. A person checks the brief and whether the draft sounds like the samples.

People who want a draft in their voice, not a generic blog voice.

The standard test

Pack 0.1.0 · specified · Brief plus two samples

Brief + 2 voice samples

Setup

One brief (a blog post or an email, chosen in the pack and used for every tool) and two writing samples. A person checks whether the draft does what the brief asked and whether it resembles the samples rather than a default assistant voice. There is no hidden brand-voice score.

Inputs

The brief and the two samples. No extra style guide.

Time limit

One wall-clock cap for every tool in the job. The number is published with the pack before the first run and does not move between tools.

What we record

  • Brief followed
  • Voice notes
  • Human edits
  • Time
  • Cost
  • Version
  • Plan

How the FitScore is built

FitScore = weighted average × 20, rounded to the nearest integer. The weighted average is the sum of (criterion score × weight) divided by 100.

  • Output quality30
  • Reliability15
  • Cost and free tier15
  • Speed10
  • Setup friction10
  • Agent, API, and MCP support10
  • Privacy and data10

5 excellent · 4 good · 3 usable · 2 poor · 1 fails. Full method.

Candidates

Candidates for Writing assistants. This order is the launch list, not a ranking. No FitScores are published.

Unranked

Claude

Anthropic

—
Not yet testedNo test date

Version and plan recorded when a test is published

Unranked

ChatGPT

OpenAI

—
Not yet testedNo test date

Version and plan recorded when a test is published

Unranked

Gemini

Google

—
Not yet testedNo test date

Version and plan recorded when a test is published

Unranked

Grok

xAI

—
Not yet testedNo test date

Version and plan recorded when a test is published

Unranked

Jasper

Jasper

—
Not yet testedNo test date

Version and plan recorded when a test is published

Unranked

Grammarly

Grammarly

—
Not yet testedNo test date

Version and plan recorded when a test is published

Questions this page answers

Best draft of a blog post or email in my voice?
FitForTool has not published a FitScore for this job. The launch candidates are Claude, ChatGPT, Gemini, Grok, Jasper, and Grammarly. Each one is listed as not yet tested. A ranking is published only after every tool in the comparison has had the same test pack run, and a person has reviewed the result. Until that page shows a FitScore, there is no winner.
How will FitForTool test writing assistants?
Brief + 2 voice samples. One brief (a blog post or an email, chosen in the pack and used for every tool) and two writing samples. A person checks whether the draft does what the brief asked and whether it resembles the samples rather than a default assistant voice. There is no hidden brand-voice score. We record brief followed, voice notes, human edits, time, cost, version, and plan. Those notes are then scored from 1 to 5 on seven shared criteria. The pack has been specified and has not been run.
Can a vendor pay to rank higher on this job?
No. FitForTool does not sell position or score. A sponsorship, if we run one later, is labelled and sits outside the ranked list. An affiliate link is disclosed and does not change order. A vendor may ask for a retest, and we rerun the same pack. Sponsors do not see the result before it is public.
What does "Not yet tested" mean?
The tool is a candidate for this job. There is no published hands-on run, so there is no FitScore, no criterion score, and no rank. Research-only is a different label, used when we have read the docs and still have not run the pack. Neither label is a score.