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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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Chat and everyday writing

ChatGPT

OpenAI

Visit

Free value

4/5

Performance

5/5

Range of uses

5/5

The safest first choice for writing work; the free tier is limited but real.

Published benchmark scores: Terminal-Bench 4.058.2% (±2.8)
share of real command-line tasks completed unaided · tested: GPT-6 Astra, max reasoning — ranked 1st
Terminal-Bench / Snorkel · 29 August 2026 · independent
Artificial Analysis Intelligence Index v4.3.253
combined score across ten reasoning and knowledge tests · tested: GPT-6 Astra, max reasoning — ranked 7th of 216 models
Artificial Analysis · 28 September 2026 · independent
Measured at 63.6 tokens per second output speed.
LMArena Elo (style-controlled)1,486
blind head-to-head preference votes from the public · tested: GPT-5.6 Sol, extra-high reasoning
Model Gauntlet (LMArena data) · 20 July 2026 · independent
OpenAI doesn't publish comparable per-model figures on a single page, so these come from independent testers. They test the top reasoning setting, which is not what the free tier gives you.
Figures copied from the sources above, checked 17 September 2026.
Cost: Free plan; Plus $20/month, Pro from $100/month.
Performance: The most reliable all-rounder for writing and rewriting. Strong at following a long, fussy instruction; occasionally confident about things it made up.
Use it for: Tailoring a resume to a specific posting
Turning rough notes into clean prose
Practicing interview answers out loud
Keep in mind: Check any fact, name, date or number before you send it to an employer.