Last Week in Plain English

Last Week in Plain English

OpenAI’s GPT-5 is here. We Cracked Open the Real Numbers.

Issue #214: OpenAI released GPT-5 and GPT-OSS, Anthropic quietly shipped Opus 4.1, and we deep-dived the benchmarks to find out what's real and what's just hype.

Sunil Sandhu's avatar
Sunil Sandhu
Aug 12, 2025
∙ Paid
last week in plain english #214

GPT-5 just dropped — so did Claude Opus 4.1 — and the AI world is buzzing about "the biggest reasoning leap yet". But which is actually worth the hype?

Sunil here, Founder of In Plain English, and this week I'm cutting through OpenAI's marketing magic to give you the real numbers.

After digging into the benchmarks, pricing, and that flashy "vibe coding" d…

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