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GPT-5

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OpenAI's latest generation language model that includes routing capabilities and thinking/non-thinking modes.

ai openai llm reasoning

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Mentioned by

Nathan Lambert

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Nathan Lambert mentioned ✓ High confidence

"Personally, I have very mixed reviews of GPT-5, but it must have saved them so much money with the high-line feature being a router where most users are no longer charging their GPU costs as much."

From: State of AI in 2026: LLMs, Coding, Scaling Laws, China, Agents, GPUs, AGI | Lex Fridman Podcast #490 • ▶ 11:26 • Jan 2026

Attribution: Nathan mentions having mixed reviews of GPT-5 but notes its cost-saving router feature