DeepSeek-V4.1-Flash

Everything Fervor AI has published that touches DeepSeek-V4.1-Flash — 4 pieces, newest first.

• What "Comparable Performance" Actually Means in an AI Efficiency Claim

  Three headline efficiency results published in the same 48 hours use three different comparison shapes, and the word comparable in one of them resolves to a six percent…

• Briefing · September 19, 2026 · morning

  Three separate groups attacked the token bill of long-horizon agents inside 48 hours, each at a different layer of the stack, and not one of them claims the cheaper…

• Terminal-Bench 2.1 vs 4.0: The Benchmark Version Number Is Now More Informative Than the Score

  When a model beats a rival on one generation of a benchmark and loses to it by twenty points on the next, the gap is the training target showing through, so the…

• Briefing · September 10, 2026 · morning

  Every headline number this morning is a price, and in each case the party quoting it is the party with the most to gain from it sounding small.