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Grok 4 Fast

(x.ai)
82 points meetpateltech | 4 comments | 20 Sep 25 01:55 UTC | HN request time: 0.645s | source
1. turblety ◴[20 Sep 25 07:12 UTC] No.45311182[source]▶
Why would a model called "Fast" not advertise the tokens per second speed it performs at? Is "Fast" not representing speed, but another meaning? Is it too variable?
replies(2): >>45311268 #>>45311646 #
2. barrell ◴[20 Sep 25 07:29 UTC] No.45311268[source]▶
I would guess that it is essentially just a “grok 4 mini”, but if you use mini as the qualifier then most people will be inclined not to use it. If you call it fast then it gives people a reason to select it.
replies(1): >>45311905 #
3. IanCal ◴[20 Sep 25 08:59 UTC] No.45311646[source]▶
They sound like they’re positioning it more that it’s faster to complete because it uses fewer tokens - see the mentions of token efficiency.
4. purkka ◴[20 Sep 25 09:53 UTC] No.45311905[source]▶
Based on the various benchmarks linked here and in the OP, the name feels justifiable. "Mini" models tend to be a lot worse compared to the base model than this one seems to be.