Gemini vs Perplexity
How Gemini and Perplexity compare on constraint stability — usage limits, pricing, model access and transparency over time.
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 |
|---|---|---|---|---|---|---|---|
| Gemini | Stable | Stable100 | Shifting87 | Stable100 | Stable95 | 10 | Google AI Pro and Ultra became available in Hong Kong and Macau. (Jul 2026) |
| Perplexity | Stable | Stable100 | Shifting73 | Stable100 | Shifting73 | 2 | Adds enterprise role-based access controls, a custom API credential vault, Brain access for Max subscribers and Opus 5. (Jul 2026) |
02 / WHICH CHANGES THE RULES LESS?
With both tools, the worst moment came silently, so this turns on magnitude and pattern rather than candor. Gemini's quiet tightening was informational: on 2025-11-27 the concrete '5 Gemini 3 Pro prompts/day' free allowance became 'basic access' with limits that 'may change frequently,' and on 2026-05-19 fixed prompt counts gave way to opaque compute-based metering — one user noting a single prompt can eat several percent of the 5-hour budget. Perplexity's was quantitative and brutal: the 2026-02-06 Deep Research cut from roughly 500/day to about 20/month (~95%), Labs halved to 25/month, uploads capped at 50/week, all silent. Gemini obscured its numbers; Perplexity kept them and slashed them. Each also course-corrected — Gemini made Flash-Lite off-quota and stopped charging failed requests on 2026-05-28 and broadened cheap access with US AI Plus at $7.99 (2026-01-27); Perplexity launched uncapped-research Max on 2025-07-17 and freed the Comet browser on 2025-10-02. Neither is a transparency exemplar, but Perplexity's single-day evisceration of a headline Pro feature is a larger shock than Gemini's gradual slide into unstated compute budgets. The deciding factor is your usage shape: need a knowable per-day allowance and Gemini frustrates because there no longer is one, though its cuts are incremental; depend on heavy research volume and Perplexity's history shows dramatic, unannounced reductions unless you're on Max. Light users lean to Gemini's cheaper tiers; research-intensive users should treat Perplexity's Pro allowances as liable to sudden compression.