Claude Opus 5.5 and GPT-6 ship 101 minutes apart, both cheaper as price war erupts
thursdai_pod · x · 2026-09-28
ThursdAI's latest episode features JevBench creator Florian S. and recaps a wild week:
- The 'pace the frontier' pledge broke within a week: after Dario's Sept 12 essay signed by Sam, Elon and Demis, Anthropic and OpenAI launched cheaper models just 101 minutes apart on Sept 22.
- Claude Opus 5.5: 40% cheaper than Opus 5, cached reads cut to $0.20/1M (from $0.50), $4 input / $20 output — a big deal for agentic coding where cache reads dominate.
- GPT-6 Sol: half the price of GPT-5.6; Luna is 40x cheaper still.
- JevBench: went from zero to 70+ models in one week, with hackers already trying to attack the test set; the creator explains his anti-cheating measures.
- Also: Meta puts Muse at the center of everything, Grok moves into Tesla, and open source cloned Jev in a week.
On model choice: GPT-6 Sol is cheaper per token, but Opus 5.5's 20¢ cached reads may win for long-context agent workloads — run your own workload to decide.
Related event: Claude Opus 5.5 and GPT-6 Launch 101 Minutes Apart, Sparking Price Cuts(2 posts)→
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