Testing
Evaluating Reasoning Models: o3, o4-mini, Claude Thinking, Step Validation, and Rollup Frameworks
Reasoning models — OpenAI's o3/o4-mini, Anthropic's Claude with extended thinking, and DeepSeek R1 — require different evaluation strategies than standard language models. They trade token budget for reasoning quality, produce verifiable intermediate steps, and have different failure modes. This guide covers building eval frameworks specifically for