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Reasoning models 'think' before answering — slower and pricier, but way better on math, code, and logic.
OpenAI's o1, o3, Claude with extended thinking, Gemini Thinking, DeepSeek R1, and Grok with reasoning — these all share a trick. Before answering, they generate a long internal 'thought' process. You don't see most of it. The result: way better on math, science, and tricky code. The cost: 10–100x more tokens and longer waits. Use them when accuracy matters.
Run the same competition-math problem on a regular model and a reasoning model. Compare answer and time.
15 questions · take it digitally for instant feedback at tendril.neural-forge.io/learn/quiz/end-builders-models-reasoning-models-explained-r7a8-teen
What is the key feature that makes reasoning models like o1, o3, and Claude Thinking different from regular chat models?
Why is it wasteful to use a reasoning model to answer a simple question like 'What is the capital of France?'
What is the primary trade-off when choosing a reasoning model over a regular chat model?
In which type of task do reasoning models show the most dramatic improvement over regular chat models?
A student needs to write a creative short story with interesting characters. Which type of model would likely produce the best result?
What did the lesson say happens when reasoning models tackle hard math problems compared to regular models?
What does it mean that reasoning models are 'pro-level model literacy'?
A developer needs to fix a bug that exists across 5 different files in a codebase. Which model type would most likely help them succeed?
Why do reasoning models cost significantly more to use than regular chat models?
Which scenario best demonstrates the appropriate use of a reasoning model?
What happens to the 'thought' process that reasoning models generate?
A teacher tells students to run the same competition-math problem on both a regular and reasoning model. What should students compare?
Why might a reasoning model perform worse on creative fiction than a regular chat model?
Which of these is the best reason to choose a regular chat model over a reasoning model?
What does it mean that reasoning models have a 'long internal thought process'?