Why is not 256k at full context?

#3
by qZitronen - opened

Your text says your test was at 131,072 context max, why not measure at 256k as well?

Good catch β€” that's my test design showing, not a ceiling. I ran the ladder at 8k/32k/64k/128k and stopped at 128k because that's where I set the top rung, not because anything failed. The model's native max is 262,144 and I simply hadn't measured it.

Worth saying why I expect it to fit: GTT at load only went 63.3 β†’ 67.2 GiB across that whole ladder β€” 3.9 GiB for 16Γ— the context. QSA's 512-block / 2048-token budget means KV barely grows here, unlike a conventional model where 128k of KV costs tens of GiB. Extrapolating that curve, 262k should sit around 71 GiB on a 128 GB box.

I'm running 262,144 now and I'll put the real numbers on the cards β€” including if it doesn't fit, because "the ladder stopped here" and "the hardware stops here" are different claims and I shouldn't have let the card blur them.

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