The job
You are reading a contested Wikipedia article and need to know whether the cited sources actually support the paragraph in front of you. The task is not “summarize this page”; it is checking one claim against the footnotes without losing your place.
Why this is hard without Sephir
You have to open each citation, skim dense source text, and keep the Wikipedia sentence in your head while switching tabs. Copy-pasting the article and sources into a separate chat breaks the browser context, hides which source came from which footnote, and makes the final answer hard to audit.
How Sephir does it
- Pin the Wikipedia tab and the citation tabs you want checked.
- Open the Sephir sidepanel with
Cmd+Shift+S. - Select the contested paragraph and ask Sephir to verify it.
- Watch the audit timeline:
extractPageText(Wikipedia)→extractPageText(citation)→ synthesis. - Review the structured finding: supported, unsupported, contradicted, or needs more context.
- Save the trace as
/fact-checkfor the next article.
The skill behind it
The skill reads the selected claim and pinned citation tabs, then returns an auditable source-by-source verdict.
What it costs
Sephir runs this recipe on your own ChatGPT Plus / API key. Typical token usage: ~4,000-8,000 input + ~500-1,200 output per run on a frontier model (Claude Opus 4, GPT-5, or Gemini 3 Pro). ChatGPT Plus via Codex OAuth adds no second bill. See for the lifetime license.
Related
- — research work needs inspectable tool calls, not a static sidebar.