The useful question is which assistant can repeatedly help with a job you actually do. Build one reusable task brief, try it in a small shortlist, and judge the result against your requirements. This gives you an answer you can revisit when products change without depending on a broad, quickly outdated ranking.
Choose one recurring job
Pick a task that happens often enough to matter: preparing a meeting summary, rewriting a support reply, extracting decisions from a report, or explaining an unfamiliar function. Define the starting material and the finished output. “Help with productivity” is too broad to evaluate. “Turn these approved notes into a customer update under 180 words” is concrete.
Use material you are allowed to share and whose answer you can check. Begin with a modest example, then include a harder example that represents a real inconvenience. The goal is to identify useful assistance, not to catch a tool with a trick question unrelated to your work.
Write the brief in five parts
Include the outcome, source material, audience, constraints, and acceptance criteria. An example is: “Draft an update for a customer from the notes below. Use only supported facts, preserve the dates, keep the tone calm, and flag any missing information. The result should be ready for an account manager to review.” Add the actual notes and any terms that must stay unchanged.
OpenAI's official usage guide describes supplying context and tools and then reviewing and refining the result. The same brief structure is an editorial method you can use across assistants; it is not a promise that every tool has identical capabilities.
Keep formatting requirements separate from factual requirements. A polished table can still contain the wrong number. Specify which details must be exact, which may be summarized, and what the assistant should do when information is absent.
Select a shortlist by access and workflow
Choose two or three products you can actually use, from the directory. Check whether each can accept your intended input and produce a usable output in the account you have. If your task needs a document upload, connected workspace, or repository, verify that route before comparing results.
Use the same task material in each tool. Record the product, date, visible model or mode when available, and important settings. If one tool receives extra context or a different prompt, note that change rather than treating the results as a controlled comparison.
Evaluate what happened after generation
Mark whether the answer preserved the required facts, followed the format, identified missing information, and needed substantial rewriting. Record the corrections you made. One invented date can matter more than several pleasant paragraphs.
Measure your own review effort with a simple note: accepted immediately, edited lightly, rewritten substantially, or unusable. You can also record elapsed time, but include the time spent preparing inputs and checking outputs. These are personal observations from your workload, not a universal benchmark.
Repeat before making a commitment
Try the brief on several examples from different days. A tool that succeeds on one easy input may struggle when the source is incomplete or the required output changes. Keep at least one example where the right response is to ask for missing information.
Finish with a narrow decision: use this assistant for this recurring job, with these checks. Revisit the choice if the job changes, access becomes unreliable, or your review effort rises. Evaluate any paid plan separately using the subscription and API billing guide; a successful trial does not establish an unlimited allowance.