# Chain-of-Thought Prompting vs Self-Consistency

> Chain-of-thought prompting asks a model to write intermediate reasoning steps before its answer, in a single response. Self-consistency builds on it by sampling several chain-of-thought responses to the same question and returning the most common final answer, which improves accuracy at the cost of several times the inference.

- Canonical URL: https://protologue.com/compare/chain-of-thought-vs-self-consistency/

## Chain-of-Thought Prompting

Chain-of-thought (CoT) prompting elicits a sequence of intermediate reasoning steps from a language model before its final answer, which improves performance on multi-step arithmetic, commonsense, and symbolic reasoning tasks.
Entry: https://protologue.com/t/chain-of-thought/

## Self-Consistency

Self-consistency samples multiple chain-of-thought reasoning paths for the same question and returns the answer that appears most often, rather than relying on a single greedy decode.
Entry: https://protologue.com/t/self-consistency/

## Differences

| | Chain-of-Thought Prompting | Self-Consistency |
|---|---|---|
| What it changes | The prompt or instruction | How many responses are sampled and how the answer is chosen |
| Model calls per question | One | Several (one per sampled reasoning path) |
| Final answer | The answer at the end of the single chain | The majority answer across chains |
| Cost | Baseline plus reasoning tokens | Roughly the baseline multiplied by the number of samples |

## Which to use

- Use chain-of-thought alone when one careful response is enough or cost and latency matter.
- Add self-consistency when answers are short and comparable, such as a number or a choice, and accuracy is worth extra calls.

## Sources

- Wei et al. (2022). Chain-of-Thought Prompting Elicits Reasoning in Large Language Models. https://arxiv.org/abs/2201.11903
- Wang et al. (2022). Self-Consistency Improves Chain of Thought Reasoning in Language Models. https://arxiv.org/abs/2203.11171

## Cite this page

Protologue. (2026). Chain-of-Thought Prompting vs Self-Consistency. In Protologue: A Taxonomy of Prompting and LLM Techniques (v1.4.0). https://protologue.com/compare/chain-of-thought-vs-self-consistency/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/)