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Equation 11 · Part 6 · OpenAI Model Systems from First Principles: Weights, Post-Training, and Inference Compute

fraction

L(N)≈L∞+(NcN)αNL(N) \approx L_\infty + \left(\frac{N_c}{N}\right)^{\alpha_N}
fraction

What this part means

Divide the expression above the line by the one below it.

Its job in the formula

The expression above the fraction bar is divided by the complete expression below it. The denominator must not be zero.

The passage around this formula

with N parameters and D training tokens, the factor of six counting the forward and backward passes. Empirically, test loss falls as a power law in each of parameters, data, and compute over many orders of magnitude, a relationship first characterised systematically by Kaplan and colleagues [ 5 ] . The important structural feature is the functional form: a term of the shape L(N)≈L∞+(NcN)αNL(N) \approx L_\infty + \left(\frac{N_c}{N}\right)^{\alpha_N}. has an irreducible floor L∞L_\infty and diminishing returns above it. Doubling N buys a fixed decrement in loss, not a fixed multiple of capability.

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Learn the underlying idea

A fraction a/b means a divided by b. The top number is the numerator; the bottom number is the denominator, and it cannot be zero.

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Sources cited in the surrounding passage

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