GPT-4.5
Near-Frontier
Brief 2025 frontier release ("Orion"). Retired in favour of GPT-5; listed for historical pricing reference only.
GPT-4.5 is a frontier AI model from OpenAI. It costs $75.000 per million input tokens and $150.000 per million output tokens (blended $97.500/M), with a 128,000-token context window.
INPUT
$75.000/M
per million input tokens
OUTPUT
$150.000/M
per million output tokens
CONTEXT
128,000
tokens
Benchmarks
No published benchmark scores tracked for this model yet. Frontier and reasoning models from major providers have scores; smaller models and inference-host variants typically inherit the underlying open-weights score.
More from OpenAI
See all 28 →GPT-5.6 Sol
Frontier · 1,050,000 ctx
in $5.000/Mout $30.000/M
GPT-5.6 Terra
Balanced · 1,050,000 ctx
in $2.000/Mout $12.000/M
GPT-5.6 Luna
Efficient · 1,050,000 ctx
in $0.200/Mout $1.200/M
GPT-5.5
Frontier · 1,050,000 ctx
in $5.000/Mout $30.000/M
GPT-5.2
Frontier · 400,000 ctx
in $1.750/Mout $14.000/M
GPT-5.2-Codex
Coding · 400,000 ctx
in $1.750/Mout $14.000/M
Frequently asked questions
How much does GPT-4.5 cost?
GPT-4.5 costs $75.000 per million input tokens and $150.000 per million output tokens, for a blended reference rate of $97.500 per million tokens.
What is GPT-4.5's context window?
GPT-4.5 supports up to 128,000 tokens of context in a single request.
What is GPT-4.5 best for?
Brief 2025 frontier release ("Orion"). Retired in favour of GPT-5; listed for historical pricing reference only.
Who makes GPT-4.5?
GPT-4.5 is developed and served by OpenAI.