LTX-2.3 to 2.5: Fast 720p goes from 3 to 9 cents per second

Moving from LTX-2.3 to LTX-2.5 triples the per-second price at 720p on LTX's own API price page: Fast goes from $0.03 to $0.09 and Pro from $0.04 to $0.12. The increase shrinks with resolution, down to +25 percent for Fast and +22 percent for Pro at 4K. The page lists both model versions, so you can still choose 2.3 at the old rates.

A 10-second clip at each setting

At 1080p a 10-second Fast clip is $0.60 on 2.3 and $1.30 on 2.5. A 10-second Pro clip is $0.80 on 2.3 and $1.70 on 2.5. At 4K the 10-second Fast clip is $2.40 against $3.00, and Pro is $3.20 against $3.90. So if 4K is your delivery format, the move to 2.5 adds 60 to 70 cents per 10 seconds, but if you draft at 720p the move more than doubles the draft bill: 10 seconds of Fast is $0.30 on 2.3 and $0.90 on 2.5.

What to do with that

Budget drafts on 2.3 Fast if its look is acceptable for your use, and reserve 2.5 for finals. The price page does not describe quality differences between versions, so test both on one prompt before choosing. Some endpoints on the same page, such as Retake, Extend and Reframe, are listed only for the 2.3 Pro model.

Sume does not list LTX at all, so you cannot pin either version through Sume. Its nearest per-second rows are wan-3.0 at $0.125 (720p) and $0.25 (1080p), and minimax-h3-max at $0.10 (768p) and $0.20 (1080p). The Sume rate is provider list x 1.25, so a Sume price is always one-quarter above what the model maker publishes; keep that in mind when you compare to a vendor list.

A monthly bill, before and after

Take 500 seconds of 720p Fast drafts and 100 seconds of 1080p Pro finals in a month. On 2.3 that is 500 x $0.03 + 100 x $0.08 = $15.00 + $8.00 = $23.00. On 2.5 it is 500 x $0.09 + 100 x $0.17 = $45.00 + $17.00 = $62.00. The bill rises by $39.00, almost 2.7 times, and $30.00 of that increase comes from the drafts.

If the drafts are the cost driver, keep them on 2.3 Fast, or draft at a different tier of another provider, and spend 2.5 only on the finals. With a mix of 2.3 Fast drafts and 2.5 Pro finals the same month is $15.00 + $17.00 = $32.00.

Reading the ratio column

The ratio is largest at the lowest resolution because the 2.3 price floor is so low, and smallest at 4K because the 2.3 price was already high. If you render mostly 720p previews, the upgrade hits hardest. If you render mostly 4K finals, it is a modest step. The price page lists both generations side by side, so check which model id your code sends before you read this as a bill forecast.