Claude vs Perplexity
Claude has a steadier constraint history on usage limits, transparency; Perplexity steadier on model availability.
Constraint stability only — pricing, limits, model availability, transparency. Not a capability comparison.
01 / SIDE-BY-SIDE
| Tool | Verdict | Pricing | Limits | Models | Transparency | 90d | Last change |
|---|---|---|---|---|---|---|---|
| Claude | Caution | Stable100 | Shifting84 | Shifting80 | Shifting81 | 5 | Anthropic's newest and most capable models became unavailable to every customer overnight by federal directive — users building on Fable 5 / Mythos 5 must migrate with no notice. First known instance of the US government forcing a deployed frontier model offline. (Jun 2026) |
| Perplexity | Watch | Stable100 | Volatile57 | Stable100 | Volatile57 | 1 | Promo-account queries throttled (May 2026) |
02 / RECENT CHANGES
Claude
5 changes in the last 90 days
Latest: Anthropic's newest and most capable models became unavailable to every customer overnight by federal directive — users building on Fable 5 / Mythos 5 must migrate with no notice. First known instance of the US government forcing a deployed frontier model offline. (Jun 2026)
Perplexity
1 change in the last 90 days
Latest: Promo-account queries throttled (May 2026)