Model Tracker
GPT-4.5
GPT-4.5 is an AI model made by OpenAI. OpenAI released it on 27 February 2025. OpenAI retired it on 26 June 2026. It takes text, image and returns text.
In inglese
GPT-4.5 is an AI model made by OpenAI. OpenAI released it on 27 February 2025. OpenAI retired it on 26 June 2026. 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 16 October 2026
- Status
- Not confirmed: two readings disagree: retired and preview
- Takes
- Text, Image — developers.openai.com, read 16 October 2026
- Returns
- Text — developers.openai.com, read 16 October 2026
- Open weights
- Not confirmed: The maker's consulted pages do not state whether GPT-4.5 has open weights.
- Licence
- Not confirmed: The maker's consulted pages do not name a licence for GPT-4.5.
- Context window
- 128,000 tokens — developers.openai.com, read 16 October 2026
- Longest answer
- 16,384 tokens — developers.openai.com, read 16 October 2026
- Knowledge cutoff
- 1 October 2023 — developers.openai.com, read 16 October 2026
- API price, input
- $75.00 per 1M tokens — developers.openai.com, read 16 October 2026
- API price, output
- $150.00 per 1M tokens — developers.openai.com, read 16 October 2026
- Where
- API, Consumer app — openai.com, read 16 October 2026
- Parameters
- Not confirmed: The maker's consulted pages do not publish a parameter count for GPT-4.5.
- Model card
- Not confirmed: two readings disagree: https://cdn.openai.com/gpt-4-5-system-card-2272025.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.
Epoch AI
- Epoch Capabilities Index, GPT-4.5: 136.7 (133.4–138.7), as of 19 October 2026
- GPQA Diamond, gpt-4.5-preview-2025-02-27: 68.7% (± 3.3), run 28 February 2025
- OTIS Mock AIME 2024–2025, gpt-4.5-preview-2025-02-27: 37.8% (± 7.3), run 28 February 2025
Epoch AI, ‘Capabilities & benchmarking’, epoch.ai/benchmarks, CC BY 4.0: Epoch AI’s own runs and its Capabilities Index. Data · CC BY 4.0
Questions
When was GPT-4.5 released?
OpenAI released GPT-4.5 on 27 February 2025.
What is the context window of GPT-4.5?
The context window of GPT-4.5 is 128,000 tokens, as OpenAI prints it.
How much does the GPT-4.5 API cost?
On the standard tier, GPT-4.5 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 take and return?
GPT-4.5 takes text, image and returns text.
What is the knowledge cutoff of GPT-4.5?
The knowledge cutoff of GPT-4.5 is 1 October 2023.
More from OpenAI
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- davinci
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- GPT-3.5 Turbo
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- GPT-4.1
- GPT-4.1 mini
- GPT-4.1 nano
- GPT-4.5 Preview
- GPT-4o
- GPT-4o mini
- GPT-4o Mini Search Preview
- GPT-4o Mini Transcribe
- GPT-4o Mini TTS
Sources
- GPT-4.5 Preview Model | OpenAI API (read 16 October 2026)
- Deprecations | OpenAI API (read 16 October 2026)
- Introducing GPT-4.5 (read 16 October 2026)
- Model Release Notes (read 16 October 2026)
- ChatGPT release notes (read 16 October 2026)
- OpenAI GPT-4.5 System Card (read 16 October 2026)