GPT-4.5

Training compute

3.8×10²⁶ FLOP

Published

Feb 27, 2025

GPT-4.5 is an AI model developed by OpenAI (United States), first published in February 2025. It works in the language, vision and multimodal domain, on tasks such as language modeling/generation, question answering, quantitative reasoning and 4 more. It counts among the frontier models: the systems trained with the most compute of their moment.

Training it took an estimated 3.8×10²⁶ FLOP of compute (estimation method: benchmarks). The compute alone is estimated at $366M in 2023 dollars.

Access: API access. Its weights are not openly released. Epoch AI rates the confidence of this record as likely.

Full record

Organization: OpenAI
Country of organization: United States
Domain: Language, Vision, Multimodal
Task: Language modeling/generation, Question answering, Quantitative reasoning, Translation, Visual question answering, Code generation, Instruction interpretation
Training compute: 3.8×10²⁶ FLOP
Compute estimation method: Benchmarks
Training time: 3,000 h
Training cost (2023 USD): $366M
Model accessibility: API access
Open weights: No
Epoch confidence: Likely

Benchmark results

01

Epoch Capabilities Index

ECI Score

137.6