Perplexity
Perplexity
2
Answer engine with citations
- Version
- Comet era
- Cost
- Free tier, Pro $20/mo
- Model
- Sonar
Semantic Scholar
Allen Institute for AI · #13 most active of 14 in Search & Research
Open academic graph and API used across research tooling.
Current version
2025
Entry cost
Free, open API
Changes / 30d
0
Capabilities
- 200M+ papers
- Citation contexts
- Open API
Pricing
Free, open API
Entry price over time
Not enough pricing history yet — we start charting from the second observation.
Geek mode
Models under the hood
- disclosed
SPECTER embeddings
Context window
—
Public API
no
Multi-model routing
no
Stack signals
- Open corpus
Shared model stack
Other tracked products running on the same foundation models — a quick read on how much of the catalog moves when one of these models changes.
- SPECTER embeddingsUnknown · 1 product
green disclosed · amber inferred · grey unknown
Reported scale
Reference data. Each figure is whatever the source actually said — weekly users, downloads, revenue run-rate — with its own definition and date. These are not comparable between tools and are never used to rank anything.
No public usage figure on record for this product.
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- Cost
- Free tier, Premium $9/mo
- Model
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- Version
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- Cost
- Free tier, Plus $12/mo
- Model
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Change history
No changes recorded yet.