> ## Documentation Index
> Fetch the complete documentation index at: https://docs.lyzr.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# OpenAI Models

> Industry-leading LLMs available in Lyzr, ranging from ultra-fast mini models to advanced reasoning and frontier systems.

Lyzr integrates with OpenAI’s most powerful models, offering a spectrum of capabilities from real-time multimodal interaction to complex, deep-thinking reasoning. These models are available to use without any additional configuration.

<AccordionGroup>
  <Accordion title="GPT-5" defaultOpen={false}>
    OpenAI's latest frontier model featuring a "Unified Thinking" system that automatically routes queries between fast responses and deep reasoning.

    **Use Cases:**

    * High-stakes enterprise orchestration
    * Complex multi-step planning and autonomous agents
    * Advanced research and data synthesis

    **Highlights:**

    * Native multimodality (text, vision, and audio trained together)
    * 400K context window with high reliability
    * Adjustable "Reasoning Effort" (Minimal to High)
  </Accordion>

  <Accordion title="GPT-5.1" defaultOpen={false}>
    A refined version of the GPT-5 baseline, optimized for improved conversational tone and enhanced personalization.

    **Use Cases:**

    * Personalized AI assistants
    * Dynamic customer experience agents
    * Content creation with specific brand-voice requirements

    **Highlights:**

    * Warmer, more human-like interaction style
    * Improved instruction-following consistency
    * Better performance in creative writing and brainstorming
  </Accordion>

  <Accordion title="GPT-5-mini / GPT-5-nano" defaultOpen={false}>
    Scalable variants of the GPT-5 architecture designed for efficiency and edge deployment.

    **Use Cases:**

    * **Mini:** Real-time API calls, lightweight agents, and summarization.
    * **Nano:** On-device processing, privacy-preserving mobile apps, and instant classification.

    **Highlights:**

    * Maintains the "Unified Thinking" logic at a lower cost
    * Ideal for high-volume, low-latency production environments
    * Minimal token usage for equivalent GPT-5 quality tasks
  </Accordion>

  <Accordion title="o3 Reasoning" defaultOpen={false}>
    The flagship of the "o-series," specifically engineered for tasks requiring intense logic and sequential reasoning.

    **Use Cases:**

    * Advanced coding and technical debugging
    * Complex mathematical proofs and scientific analysis
    * Strategic decision-making and policy evaluation

    **Highlights:**

    * Direct "Chain-of-Thought" processing visible to the user
    * High-tier performance on STEM benchmarks (AIME, ARC-AGI)
    * First reasoning model with autonomous tool-use (Search, Python)
  </Accordion>

  <Accordion title="o4-mini" defaultOpen={false}>
    A breakthrough small-scale reasoning model that delivers deep analytical capabilities at a fraction of the cost.

    **Use Cases:**

    * High-volume reasoning tasks (e.g., analyzing thousands of legal docs)
    * STEM-focused educational tools
    * Cost-effective structured data extraction

    **Highlights:**

    * 20% better performance than o3-mini with 10x lower cost
    * 200K context window for long-context reasoning
    * Native multimodal support within the reasoning chain
  </Accordion>

  <Accordion title="GPT-4.1" defaultOpen={false}>
    An enterprise-optimized flagship model focused on high-throughput, reliability, and precision in instruction following.

    **Use Cases:**

    * Real-world software engineering (Excel at code diffs)
    * Extracting insights from 1M+ token documents
    * Predictable, low-latency business workflows

    **Highlights:**

    * Massively expanded 1M token context window
    * Significantly better at "Format Following" (JSON, XML, YAML)
    * Half the latency of GPT-4o for complex tasks
  </Accordion>

  <Accordion title="GPT-4o" defaultOpen={false}>
    A versatile, multimodal model designed for natural, real-time human-computer interaction.

    **Use Cases:**

    * Real-time voice translation and customer support
    * Interactive video analysis and vision-based troubleshooting
    * Multimodal RAG applications

    **Highlights:**

    * Sub-320ms latency for audio/visual inputs
    * "Omni" architecture (handles text, audio, and images natively)
    * Balanced performance across 50+ languages
  </Accordion>

  <Accordion title="GPT-4o-mini" defaultOpen={false}>
    The most cost-efficient and fastest small model in the GPT-4o family.

    **Use Cases:**

    * Lightweight chatbots and simple Q\&A
    * Basic sentiment analysis and text classification
    * Rapid prototyping of AI-powered features

    **Highlights:**

    * Over 60% cheaper than GPT-3.5 Turbo
    * Faster than its larger counterpart for text-only tasks
    * Supports the same 128K context window as the flagship
  </Accordion>
</AccordionGroup>

> 💡 **Recommendation:** Use **GPT-5** for complex autonomous agents, **o3/o4-mini** for heavy logic or math, and **GPT-4.1** for long-document analysis and coding tasks.