GPT-4.5
OpenAI🇺🇸 United States
OpenAI's largest GPT model. Strongest emotional intelligence and world knowledge of any GPT, optimized for agentic workflows.
Context window128K tokens
Input / 1M tokens$75
Output / 1M tokens$150
Version History
gpt-4-5-preview-2025-02-27major
GPT-4.5 preview debuts as OpenAI's largest model. Best-in-class emotional intelligence and world knowledge. Focused on agentic reliability.
Benchmark Scores
Full leaderboard →79.0%
HumanEval
86.0%
MMLU
42.0 tokens_per_sec
Speed (tok/s)