o3 is an LLM that excels in advanced reasoning, coding, mathematics, science, and visual perception tasks. It is OpenAI's most powerful reasoning model to date and is notable for its ability to integrate web browsing and image understanding directly into its problem-solving process.

Some other noteworthy features of o3 include agentic tool use—allowing it to chain together multiple tool calls (such as searching the web, running code, generating graphs or images) within a single task—and support for up-to-date information retrieval beyond its built-in knowledge. o3 can also interact with custom tools via function calling in the API and demonstrates strong performance on complex benchmarks across coding, science questions, software engineering tasks, and abstract reasoning.

Metric	Value
Parameter Count	Unknown
Mixture of Experts	Unknown
Context Length	Unknown
Multilingual	Yes
Quantized*	Unknown

*Quantization is specific to the inference provider and the model may be offered with different quantization levels by other providers.