A novel inflection-point inflation model is analysed. The model considers a massless scalar field, whose self-coupling's running is stabilised by a non-renormalisable operator. The running is controlled by a fermion loop. We find that successful inflation is possible for a natural value of the Yukawa coupling y≃4×10−4. The necessary fine-tuning is only ∼10−6
Nearby in the stack
, which improves on the typical tuning of inflection-point inflation models, such as MSSM inflation. The model predicts a spectral index within the 1-
σ
bound of the latest CMB observations, with negligible tensors (
r∼10−(9−10)
). These results are largely independent of the order of the stabilising non-renormalisable operator.