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Compare two AI models

Pick two models and see what each costs, how well it works and what it's actually for. The scores are my own judgment on a 1–5 scale from using these — not vendor claims and not benchmark results. Your picks stay in the address bar, so you can send the comparison to someone else.

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Second model

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Chat and everyday writing

Pi

Inflection

Visit

Free value

5/5

Performance

3/5

Range of uses

2/5

Free and calming to talk to, but not the one for producing finished work.

Published benchmark scores: OpenUGI31.5
willingness and ability to answer awkward open-ended questions · tested: Inflection-3 Pi
Benchmark List · 6 May 2026 · independent
Not a general-capability test; no MMLU, GPQA or LMArena entry exists for Pi.
Aggregate claim against GPT-4 (no per-test figures released)"over 94% of GPT-4's average performance", on 40% of the training compute
the maker's own summary across a set of benchmarks it chose · tested: Inflection-2.5, the model behind Pi
Inflection's launch announcement, reported by VentureBeat · 7 March 2024 · maker's own figures
An averaged claim, not a score: Inflection never published the per-benchmark table, its own page for the model is gone, and GPT-4 is two generations old. Read it as history.
Pi is barely benchmarked — Inflection stopped competing on leaderboards. The one current figure is from a niche test, so treat it as a curiosity rather than a ranking.
Figures copied from the sources above, checked 17 September 2026.
Cost: Free — there is no paid consumer plan to buy.
Performance: Conversational and patient rather than sharp — it asks questions back instead of producing walls of text.
Use it for: Talking through a career decision
Rehearsing a difficult conversation
Getting unstuck when you don't know what to ask