GPT-4.5

ProprietaryMultimodal

About

Improved GPT-4 variant released March 2026. Enhanced performance over GPT-4o with better reasoning and code generation.

Capabilities

VisionMultimodalReasoningFunction CallingTool UseJSON ModeCode Execution

Rankings

Best LLMs for Code Generation Best Multimodal / Vision LLMs Best LLMs for Function Calling & Tool Use Cheapest LLM APIs

Specifications

Released2026-03-12

Context8K

Knowledge cutoff2025-04

Fine-tuning1