Compare models
Put models side by side on price, context, capabilities, and benchmarks.
OpenAI o1 is the first model in OpenAI's dedicated reasoning line, using extended internal chain-of-thought before answering. It is designed for hard math, science, and coding problems that benefit from deliberate step-by-step reasoning.
Claude Haiku 4.5 is Anthropic's fast, affordable small model in the Claude 4 generation, balancing strong instruction-following and coding ability with low latency. It is designed for high-throughput agentic and chat applications where speed and cost efficiency are priorities.
Benchmarks
Head-to-head scores across reasoning, coding, and agentic indices, plus per-domain rankings.