Is GPT-4.5 out yet?
Yes.
About GPT-4.5
A large general-purpose model emphasizing breadth and reduced hallucination.
How we confirmed it
Released via official access
February 27, 2025 at 12:00 AM UTC
Release timeline
Waiting for OpenAI's next model?
One click creates your free account (or signs you into an existing one) and turns on alerts for OpenAI releases. There's no password to set, and you can unsubscribe any time.
Benchmarks
Humanity's Last Exam
GPT 4.5 Preview · via Epoch AI · captured Aug 10, 2026 · source
5.4
LM Arena#69
gpt-4.5-preview-2025-02-27 · via LM Arena · 14,547 votes · captured Aug 10, 2026 · source
1444.748990936912
Sourced metrics mirrored with attribution - not community sentiment.
Data from Epoch AI, “AI Benchmarking Hub” (CC BY 4.0).
Vibe rating
How this model actually feels to use, rated by the people here.
No vibe ratings yet. Be the first.
Sign in to rate this model.
Model Pulse
How is this model behaving today? One check-in per person per day: the running record of “did they nerf it”. Resets at midnight UTC.
No check-ins yet today. Be the first to log how this model is behaving.
Community consensus
An AI summary of the public comments here. Not a sourced fact.
Not enough public feedback yet to summarize. Add a comment to help build the picture.
Compare GPT-4.5 with another model →
Also waiting on: Gemini 3.5 Pro, Claude Fable 5.1, Claude Mythos 5.1, GLM-6
Comments
Missing a model, or wishing OutYet did something it doesn't? Tell us what to build.