R 
ResearchRabbit
Free, graph-based, and complementary to research agents.
NOT REALLY
why this verdict
Keep it — OpenAI has not replaced it
OpenAI's version overlaps, but does not finish the research job, so this one is still worth keeping open.
- A named launch, not a vibe named, unlinked
- Citation graphs are structured data, not generated text. OpenAI, February 2, 2025 — no announcement link recorded yet.
- How much of the job it covers not the job editorial call
- Parts of it. The job still needs the tool to get finished.
- Is there a free way to do it? yes
- 1 of 2 listed replacements have a usable free tier: Connected Papers.
- What the call is worth nothing to cancel
- No paid entry tier tracked, so there is no subscription to cancel.
Reason composed from the fields above missing: announcement linked recorded: free replacement listed recorded: two or more escape hatches
- Threatened by
- OpenAI
- Since
- February 2, 2025
- List price
- free
- Per year
- —
The backstory
ResearchRabbit maps citation networks so you can see how a literature developed. Deep-research agents summarise papers; they do not give you the visual structure of a field. It is free, and researchers use both.
Escape hatches
C 
Connected Papers Similar citation graphs.
connectedpapers.com open_in_new L 
Litmaps Paid alternative with alerts.
litmaps.com open_in_new1 of 2 replacements have a usable free tier.