Forward-pass gas for five neural nets run inside the EVM, on a log axis against the live Ethereum (60M) and Base (400M) block-gas ceilings. Toggle ML2SC's measured ~106k gas/edge vs an optimized ~1.5k floor, slide the gas price for a USD readout, and watch an MNIST net blow past 180 Ethereum blocks.
Most 'on-chain AI' keeps the model off-chain and posts a proof. But you can also just run the forward pass in Solidity. We do the gas math — ~106k gas per weight, an MNIST net that needs 180 Ethereum blocks — and find the thin band of models that fit.