GPT-4.5
by OpenAI · paid · Last verified 2026-03-17
OpenAI's largest and most capable model prior to GPT-5, emphasizing unsupervised learning breadth for reduced hallucination and improved creative writing. Positioned as a research preview demonstrating how scale improves factual accuracy and emotional intelligence.
https://openai.com/index/gpt-4-5-system-card/ ↗B
B—Above Average
Adoption: B+Quality: A+Freshness: ACitations: BEngagement: F
Specifications
- License
- Proprietary
- Pricing
- paid
- Capabilities
- text-generation, code-generation, multimodal-vision, creative-writing, reduced-hallucination, function-calling
- Integrations
- azure-openai, langchain, llama-index, semantic-kernel
- Use Cases
- creative-writing, research, complex-analysis, content-creation, factual-qa
- API Available
- Yes
- Parameters
- Undisclosed (largest dense model)
- Context Window
- 128K tokens
- Modalities
- text, image
- Training Cutoff
- December 2024
- Tags
- llm, reasoning, multimodal, creative-writing, low-hallucination
- Added
- 2026-03-17
- Completeness
- 100%
Index Score
64Adoption
72
Quality
91
Freshness
82
Citations
68
Engagement
0