OpenAI

Documentation Index

Fetch the complete documentation index at: https://docs.hicap.ai/llms.txt

Use this file to discover all available pages before exploring further.

All OpenAI models below are accessible through the Hicap API using the standard OpenAI API spec. Point your OpenAI SDK at https://api.hicap.ai/v1 and use any model ID listed here. For pricing, see the Model Catalog.

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gpt-5.5

GPT-5.5 is OpenAI’s latest flagship model available through the Hicap API. Use the gpt-5.5 model ID in OpenAI-compatible endpoints for top-tier general-purpose reasoning, coding, analysis, and multimodal workloads.

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gpt-5.5-pro

GPT-5.5 Pro is the pro-tier GPT-5.5 model available through the Hicap API. Use the gpt-5.5-pro model ID when your workload needs the highest capability option in the GPT-5.5 family.

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gpt-5.4

GPT-5.4 is OpenAI’s most advanced model, offering a massive 1.05M token context window with state-of-the-art reasoning, coding, and multimodal capabilities. It features long-context tiers above 272K tokens for cost-efficient processing of very large inputs.

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gpt-5.3-chat-latest

GPT-5.3 Chat Latest is a conversationally optimized model from the GPT-5.3 family, designed for responsive dialogue and instruction fidelity. It supports a 200K token context window and delivers strong performance across chat-based applications.

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gpt-5.3-codex

GPT-5.3 Codex is a code-optimized variant from the GPT-5.3 family, purpose-built for software development workflows. It excels at code generation, editing, debugging, and agentic coding tasks with a 200K token context window.

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gpt-5.2

GPT-5.2 is a highly capable general-purpose language model designed for advanced reasoning, long-context understanding, and instruction fidelity. It delivers stable, coherent outputs across complex tasks and extended conversations, while supporting multimodal inputs for richer and more contextual responses.

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gpt-5.2-chat-latest

GPT-5.2 Chat is a conversationally optimized variant of GPT-5.2, designed to deliver natural, responsive, and context-aware dialogue. It emphasizes turn-by-turn coherence, low-latency interactions, and strong instruction following in chat-based environments, while retaining advanced reasoning and multimodal understanding.

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gpt-5.1

GPT-5.1 is a reliable and efficient language model that offers strong general-purpose capabilities with balanced reasoning, instruction following, and text generation. It provides consistent performance across common NLP tasks while prioritizing stability and cost efficiency.

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gpt-5.1-chat-latest

GPT-5.1 Chat is a conversationally tuned language model optimized for responsive, natural dialogue and consistent instruction following. It builds on GPT-5.1’s stable core capabilities while prioritizing low-latency interactions and smooth conversational flow in chat-based applications.

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gpt-5

Full-scale flagship OpenAI model. Delivers state-of-the-art reasoning, creativity, coding, and multimodal support. Handles long contexts (hundreds of thousands of tokens) and complex workflows.

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gpt-5-chat

This use case employs OpenAI’s foundational GPT-5 model (which is the default model in the ChatGPT interface). It is a general-purpose multimodal reasoning engine designed to understand, generate, and synthesize complex information in a coherent and contextually relevant manner, simulating a fluid human conversation without requiring a specific “chat” model.

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gpt-5-mini

A lighter and faster variant of GPT-5. Preserves strong reasoning and coding ability, but optimized for lower latency and cost. Good balance between performance and efficiency.

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gpt-5-nano

Ultra-light, low-latency model. Prioritizes speed and efficiency over advanced reasoning. Best for lightweight tasks where response time and throughput matter more than nuance.

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gpt-4o

OpenAI’s high-intelligence flagship model for complex, multi-step tasks. GPT-4o is cheaper and faster than GPT-4 Turbo

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gpt-4o-mini

OpenAI’s affordable and intelligent small model for fast, lightweight tasks. GPT-4o mini is cheaper and more capable than GPT-3.5 Turbo

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gpt-4.1

GPT-4.1 is the flagship model of the new 4.1 family, excelling in coding, following complex instructions, and managing long contexts (up to 1 million tokens), making it the powerful go-to choice for demanding applications.

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gpt-4.1-mini

GPT-4.1 mini is optimized for speed and efficiency, being 40% faster then GPT-4o. GPT-4.1 mini offers a balanced approach with robust performance for simpler or time-sensitive tasks, providing faster response times compared to its more feature-rich counterpart.

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gpt-4.1-nano

GPT-4.1 nano is the smallest, fastest, and most cost-effective option of the GPT-4.1 family. GPT-4.1 nano is ideal for high-volume applications such as autocomplete, classification, and extracting details from lengthy documents while maintaining a strong performance profile.