OpenAI GPT-4.5 Language Model

An OpenAI GPT-4.5 Language Model is a multimodal language model within an OpenAI LLM Family.

AKA: GPT-4.5, OpenAI GPT-4.5, OpenAI's GPT-4.5.

• Context:
  • It can typically be a Foundation LLM.
  • It can typically be a Instruction-Tuned LLM.
  • It can typically demonstrate Enhanced Reasoning Capability through advanced computation.
  • ...
  • It can range from being a Base GPT-4.5 Model to being a GPT-4.5 Turbo Model, depending on its model variant.
  • It can range from being a Text-Only GPT-4.5 to being a Multimodal GPT-4.5, depending on its input modality.
  • It can range from being a Standard Context GPT-4.5 to being an Extended Context GPT-4.5, depending on its context window size.
  • ...
  • It can have model architecture with:
    • GPT-4.5's Scale of significantly larger parameter count than GPT-4
    • GPT-4.5 Mixture Of Experts (MoE) with improved expert routing
    • GPT-4.5 Corpus with advanced data-efficient training
    • GPT-4.5 Training Cost requiring substantial computational resources
    • GPT-4.5 Inference Architecture using distributed computing clusters
  • ...
  • It can support input processing through:
    • Text Processing for natural language input
    • Code Processing for programming language input
    • Image Processing for visual input
    • Audio Processing for speech input
  • It can provide output generation through:
    • Text Output for natural language output
    • Code Output for programming solutions
    • Image Output for analytical tasks
  • It can maintain enhanced factual accuracy through advanced information verification.
  • It can follow complex user instructions through improved steerability mechanism.
  • ...
  • It can be a Multi-Modal LLM.
  • It can be a State-of-the-Art LLM.
  • ...
• Example(s):
  • GPT-4.5 Base Models (from 2025-04, cutoff 2024-10), such as:
    • gpt-4.5 (128k) with 128,000 token context and base capabilitys
    • gpt-4.5-512k with 512,000 token context and extended context
    • gpt-4.5-0410 with initial release features
  • GPT-4.5 Vision Models (from 2025-04), such as:
    • gpt-4.5-vision with enhanced visual analysis capability
    • gpt-4.5-vision-advanced with improved recognition
  • GPT-4.5 Audio Models (from 2025-04), such as:
    • gpt-4.5-audio with advanced speech processing
    • gpt-4.5-audio-realtime with real-time conversation
  • GPT-4.5 Specialized Models (from 2025-04), such as:
    • gpt-4.5-reasoning with enhanced logical reasoning
    • gpt-4.5-creative with improved creative generation
  • ...
• Counter-Example(s):
  • OpenAI GPT-4 Language Models, which lack gpt-4.5 enhanced reasoning capability.
  • OpenAI GPT-3.5 Language Models, which lack gpt-4.5 advanced computational power and gpt-4.5 nuanced understanding.
  • Google Gemini Models, which use different architecture and different training methodology.
  • Anthropic Claude Models, which employ different alignment approaches.
• See: Transformer Architecture, Mixture of Experts (MoE), Data-Efficient Training, Azure OpenAI Service, Auto-GPT Framework, DSPy Framework.
• References:
  • OpenAI GPT-4.5 Development Discussion (2025), featuring insights from Sam Altman, Amin Tootoonchian, Alex Paino, and Daniel Selsam.
  • OpenAI Documentation (2025), detailing GPT-4.5 technical specifications.
  • GPT-4.5 Technical Report (2025), explaining training methodology and performance metrics.

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