Optimal rates for zero-order convex optimization: the power of two function evaluations
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Abstract (arXiv)
We consider derivative-free algorithms for stochastic and non-stochastic convex optimization problems that use only function values rather than gradients. Focusing on non-asymptotic bounds on convergence rates, we show that if pairs of function values are available, algorithms for d-dimensional optimization that use gradient estimates based on random perturbations suffer a factor of at most √d in convergence rate over traditional stochastic gradient methods. We establish such results for both smooth and non-smooth cases, sharpening previous analyses that suggested a worse dimension dependence, and extend our results to the case of multiple (m ≥ 2) evaluations. We complement our algorithmic development with information-theoretic lower bounds on the minimax convergence rate of such problems, establishing the sharpness of our achievable results up to constant (sometimes logarithmic) factors.
Key facts. Cited by 190 papers in the map (data through 7 Oct 2026). First posted on arXiv 7 Dec 2013.
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Citing papers per year: 2021: 15; 2022: 21; 2023: 28; 2024: 40; 2025: 40; 2026: 46.
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50 most cited of 190 All 190 (JSON)
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50 newest of 190 All 190 (JSON)
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- 2026A Zeroth-Order Paradigm for LLM Preference Alignment16 Sep 2026
- 2025ComPO: Preference Alignment via Comparison Oracles8 May 2025
- 2024Corruption Robust Offline Reinforcement Learning with Human Feedback9 Feb 2024
- 2023Zeroth-Order Optimization Meets Human Feedback: Provable Learning via Ranking Oracles7 Mar 2023
- 2023Fine-Tuning Language Models with Just Forward Passescited by 337
- 2024Revisiting Zeroth-Order Optimization for Memory-Efficient LLM Fine-Tuning: A Benchmarkcited by 113
- 2022Do Differentiable Simulators Give Better Policy Gradients?cited by 83
- 2023DeepZero: Scaling up Zeroth-Order Optimization for Deep Model Trainingcited by 76
- 2024Test-Time Model Adaptation with Only Forward Passescited by 74
- 2021How to Learn when Data Reacts to Your Model: Performative Gradient Descentcited by 70
- 2022Communication-Efficient Stochastic Zeroth-Order Optimization for Federated Learningcited by 59
- 2024Sparse MeZO: Less Parameters for Better Performance in Zeroth-Order LLM Fine-Tuningcited by 53
- 2024Variance-reduced Zeroth-Order Methods for Fine-Tuning Language Modelscited by 50
- 2024Enhancing Zeroth-order Fine-tuning for Language Models with Low-rank Structurescited by 48
- 2022Private Convex Optimization via Exponential Mechanismcited by 47
- 2021Random Noise Defense Against Query-Based Black-Box Attackscited by 46
12 most cited of 181 All 181 (JSON)
- 2026Learning to Price Electricity for Optimal Demand Response30 Sep 2026
- 2026Parameter-Free Zeroth-Order Optimization with Ellipsoidal Sampling29 Sep 2026
- 2026TerMeZO: Ternary Sparse Zeroth-Order Optimization for Fine-tuning BitNet Models at the Edge27 Sep 2026
- 2026Adaptive Agent Design11 Sep 2026
- 2026EGGROLL, Unrolled: Understanding and Improving Low-Rank Evolution Strategies at Scale10 Sep 2026
- 2026Beyond Peak Backlog: Conditional Energy and Temporal Geometry in Capacity-Constrained Delayed Bandit Optimization17 Aug 2026
- 2026SubZero+: Memory-Efficient Adaptive Zeroth-Order LLM Fine-Tuning in Random Subspaces16 Aug 2026
- 2026Online Convex Optimization with Dueling Feedback15 Aug 2026
- 2026Curvature-Aware Zeroth-Order Optimization for Memory-Efficient Test-Time Adaptation12 Aug 2026
- 2026LoCA: Forward-Only LLM Tuning after One-Shot Calibration with Local Credit Assignment4 Aug 2026
- 2026Accelerating Evolutionary Strategy via Rao-Blackwellizing Realization of Uncertain Input3 Aug 2026
- 2026Sharp Optimal Algorithm for Derivative-Free Stochastic Convex Optimization in One Dimension14 Jul 2026
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