OpenAI AI Models

OpenAI's most advanced model released April 2026. GPT-5.5 is recommended for most reasoning workloads, combining frontier intelligence with configurable reasoning effort (none → xhigh). Available in API, Codex, and ChatGPT.

Highest-intelligence API option in the GPT-5.5 family. Use for the most challenging problems that require maximum reasoning depth and can tolerate higher latency. Supports full reasoning effort range from none to xhigh.

GPT-5.4 is OpenAI's frontier model for complex professional work, designed for agentic, coding, and professional workflows with the highest reasoning capability. Features a 1.05M token context window, native computer use, and built-in support for web search, file search, and MCP.

GPT-5.4 Pro is a premium version of GPT-5.4 that produces smarter and more precise responses by using more compute to think harder. Supports reasoning effort levels (medium, high, xhigh) and is optimized for tackling the most difficult problems requiring deep reasoning.

GPT-5.4 Mini is OpenAI's strongest mini model yet for coding, computer use, and subagents. Brings many of the strengths of GPT-5.4 to a faster, more efficient model designed for high-volume workloads with reasoning token support.

GPT-5.4 Nano is OpenAI's cheapest GPT-5.4-class model for simple high-volume tasks. Ideal for classification, data extraction, ranking, and sub-agents with fast speed and reasoning token support at the lowest cost.

GPT-5.3 Codex is OpenAI's most capable agentic coding model, combining frontier software engineering performance with broad reasoning capabilities. 25% faster than GPT-5.2 with state-of-the-art SWE-Bench Pro results and strong terminal proficiency.

GPT-5.2 is OpenAI’s flagship model for coding, reasoning, and agentic tasks across industries, offering an expanded context window and strong performance for complex multi-step workflows with advanced tool support.

GPT-5.2 Codex is OpenAI's dedicated coding model built on the GPT-5.2 architecture. Optimized for software engineering tasks with strong agentic coding capabilities and expanded context window support.

OpenAI's latest GPT-5.1 released November 2025, featuring smarter and more conversational AI with dynamic reasoning adjustment. Outperforms both GPT-4.1 and GPT-5 while running 2-3x faster with improved coding capabilities and steerability.

GPT-5.1 Codex is OpenAI's coding-optimized model built on the GPT-5.1 architecture with dynamic reasoning adjustment. Delivers strong software engineering performance with 2-3x faster speed and extended prompt caching.

OpenAI's most advanced unified model released August 2025, combining reasoning and fast response capabilities in one system. Features adaptive routing that automatically switches between instant answers and deep thinking based on task complexity, achieving 94.6% on AIME 2025 and 74.9% on SWE-bench Verified.

Cost-effective variant of GPT-5 maintaining advanced reasoning capabilities at accessible pricing. Delivers GPT-5 level intelligence with balanced performance for everyday use cases while supporting multimodal inputs and web search functionality.

Ultra-fast and most cost-effective GPT-5 variant optimized for high-volume applications. Provides near-instant responses while maintaining GPT-5 intelligence, ideal for chatbots, customer support, and automated systems requiring speed and efficiency.

GPT-5 Codex is the original GPT-5 coding variant optimized for software engineering tasks. Features adaptive routing between instant answers and deep thinking based on task complexity with strong agentic coding capabilities.

Advanced flagship model with comprehensive tool support and enhanced coding capabilities. Features 1M+ token context window and superior performance on complex reasoning tasks, achieving 21.4% improvement over GPT-4o on software engineering benchmarks.

Balanced model combining intelligence, speed, and cost-effectiveness from the GPT-4.1 family. Provides reliable performance for business applications while maintaining large context capabilities and comprehensive tool support at accessible pricing.

Fastest and most cost-effective model in the GPT-4.1 family optimized for real-time applications. Maintains GPT-4.1 intelligence while providing ultra-low latency for high-volume, cost-sensitive deployments.

Latest small reasoning model in the o-series optimized for fast, effective reasoning with exceptional performance in coding and visual tasks. Features streaming support and configurable reasoning effort levels for optimal cost-performance balance.

Most advanced reasoning model with complete tool integration and visual perception capabilities. Achieves state-of-the-art performance on complex benchmarks including 71.7% on SWE-bench Verified and comprehensive support for multi-step problem solving.

Cost-efficient reasoning model optimized for coding, mathematics, and science with production-ready developer features. Supports function calling, structured outputs, and configurable reasoning effort while maintaining high performance in STEM domains.

Premium reasoning model with extended compute for maximum reliability and comprehensive tool access. Designed for challenging problems where accuracy matters more than speed, featuring the highest level of reasoning performance in the o3 family.

OpenAI's flagship image generation model released April 2026. Supports flexible resolution up to 4K, auto quality selection, and is 33% cheaper than GPT Image 1.5 at high quality — ideal for high-volume professional creative workflows

OpenAI's fastest image generation model with enhanced editing precision and text rendering. 4x faster and 20% cheaper than GPT Image 1 - ideal for high-volume creative workflows requiring consistent quality and rapid iteration

Latest multimodal image generation model with superior instruction following, accurate text rendering, and advanced editing capabilities - ideal for creative tools, design workflows, and professional-grade visual content creation

Budget-friendly image generation model that is 80% cheaper than GPT Image 1 while maintaining core multimodal capabilities - perfect for high-volume creative workflows, prototyping, and cost-conscious image generation projects