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A plain guide to AI benchmarks: what MMLU, GPQA, Humanity's Last Exam, SWE-bench, ARC-AGI, AIME and Arena measure, where they fail, and how to read a score.

System One models decide instead of writing. Learn what Jev from TypeSafe AI does, how it differs from an LLM like ChatGPT, and when to use one.

Which ChatGPT model should you use? GPT-6 Instant, Medium, High, Extra High and Pro compared, plus what the Free plan gets and the best pick for each task.