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Which AI tool fits the job?

Comparisons written by someone who pays for these tools and uses them on real projects. Every page says what was tested hands-on and what comes from documentation, with the date next to every price.

Category

Coding agents

Claude Code, Codex and the agents around them, from using them on real products.

Head-to-head Claude Code vs Codex Which coding agent should you pay for, and when is it worth having both?
How these pages work

Tested where possible, labelled where not.

01

Real tasks

Tests use work from my own projects: a feature in a live product, a German correction, a structured extraction. A page only says "tested" for what I actually ran.

02

Sources and dates

Product facts link to the vendor's own documentation. Prices come from the vendor's pricing page, "as of" the day I read it. Benchmarks carry their name and date.

03

No affiliate links

Nobody pays for a placement, and the links are plain links. Where my own skills fit a tool, the page says so and names them as mine.

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Free starter kit

Whichever tool you pick

Four free skills that work in Claude, Claude Code and Codex: a handover routine, a session-start checklist, a caption writer and an exam-prep tutor.