Model Tracker
GPT-4.5 Preview
GPT-4.5 Preview is an AI model made by OpenAI. OpenAI released it on 27 February 2025. OpenAI retired it on 14 July 2025.
GPT-4.5 Preview is an AI model made by OpenAI. OpenAI released it on 27 February 2025. OpenAI retired it on 14 July 2025. It takes text, image and returns text. Its context window is 128,000 tokens. Its longest answer is 16,384 tokens. Through the API it costs $75.00 per 1M tokens for input and $150.00 per 1M tokens for output. Its knowledge cutoff is 1 October 2023.
- Released
- 27 February 2025 — openai.com, read 19 October 2026
- Status
- Not confirmed: two readings disagree: retired and deprecated
- Takes
- Text, Image — developers.openai.com, read 19 October 2026
- Returns
- Text — developers.openai.com, read 19 October 2026
- Open weights
- Not confirmed: The OpenAI pages reviewed do not state whether GPT-4.5 Preview's weights are open or closed.
- Licence
- Not confirmed: The OpenAI pages reviewed do not name a licence for GPT-4.5 Preview.
- Context window
- 128,000 tokens — developers.openai.com, read 19 October 2026
- Longest answer
- 16,384 tokens — developers.openai.com, read 19 October 2026
- Knowledge cutoff
- 1 October 2023 — developers.openai.com, read 19 October 2026
- API price, input
- $75.00 per 1M tokens — developers.openai.com, read 19 October 2026
- API price, output
- $150.00 per 1M tokens — developers.openai.com, read 19 October 2026
- Where
- API, Consumer app — openai.com, read 19 October 2026
- Parameters
- Not confirmed: The OpenAI pages reviewed do not publish a parameter count for GPT-4.5 Preview.
- Model card
- Not confirmed: two readings disagree: https://cdn.openai.com/gpt-4-5-system-card.pdf and https://openai.com/index/gpt-4-5-system-card
Benchmarks
Measured by others, not by the maker: each score with the name the measurer gives the model and the setting it ran, its day and its licence.
Arena
- Text Arena, gpt-4.5-preview-2025-02-27: 1,445 (1,439–1,450, 14,547 votes), published 15 October 2026
- Vision Arena, gpt-4.5-preview-2025-02-27: 1,225 (1,213–1,237, 2,925 votes), published 9 October 2026
Arena’s leaderboard dataset (lmarena-ai/leaderboard-dataset on Hugging Face), CC BY 4.0: ratings from people’s votes between two anonymous models, as Arena publishes them. Data · CC BY 4.0
Questions
When was GPT-4.5 Preview released?
OpenAI released GPT-4.5 Preview on 27 February 2025.
What is the context window of GPT-4.5 Preview?
The context window of GPT-4.5 Preview is 128,000 tokens, as OpenAI prints it.
How much does the GPT-4.5 Preview API cost?
On the standard tier, GPT-4.5 Preview costs $75.00 per 1M tokens for input and $150.00 per 1M tokens for output, as OpenAI lists it.
What does GPT-4.5 Preview take and return?
GPT-4.5 Preview takes text, image and returns text.
What is the knowledge cutoff of GPT-4.5 Preview?
The knowledge cutoff of GPT-4.5 Preview is 1 October 2023.
More from OpenAI
- ada
- babbage
- babbage-002
- code-davinci-002
- computer-use-preview
- curie
- dall-e-3
- DALL·E
- DALL·E 2
- davinci
- davinci-002
- GPT-3.5 Turbo
- GPT-3.5 Turbo Instruct
- GPT-4
- GPT-4 Turbo
- GPT-4.1
- GPT-4.1 mini
- GPT-4.1 nano
- GPT-4.5
- GPT-4o
- GPT-4o mini
- GPT-4o Mini Search Preview
- GPT-4o Mini Transcribe
- GPT-4o Mini TTS
Sources
- GPT-4.5 Preview Model (read 19 October 2026)
- Deprecations (read 19 October 2026)
- Introducing GPT-4.5 (read 19 October 2026)
- OpenAI GPT-4.5 System Card (read 19 October 2026)