GPT-4.1 is OpenAI's 1.6 trillion parameter multimodal reasoning system featuring a 256-expert MoE architecture with enhanced tool integration and world knowledge grounding. Optimized for enterprise applications with improved factual accuracy and reduced hallucination.

GPT-4.1 Mini is a distilled 400B-parameter version of GPT-4.1 optimized for cost-efficient deployment. Features the same 256-expert MoE architecture with selective expert activation, delivering 80% of GPT-4.1's capability at 30% of the inference cost.

GPT-4.1 Nano is a highly efficient 100B-parameter variant optimized for edge deployment and mobile devices. Features 128 experts with aggressive pruning and INT8 quantization, delivering 60% of GPT-4.1's capability while consuming 75% less power.

GPT-4o (Omnimodal) is OpenAI's 1.2 trillion parameter multimodal foundation model featuring unified input processing across text, vision, and audio. Optimized for real-time interaction with enhanced reasoning and cross-modal understanding capabilities.

GPT-4o Mini is a distilled 400B-parameter version of GPT-4o optimized for cost-efficient omnimodal applications. Maintains core multimodal capabilities with 70% of GPT-4o's performance at 40% of the computational cost, featuring real-time audio/image processing optimizations.

A large, multimodal language model with advanced reasoning capabilities and support for tools. It supports the new OpenAI Responses API with features like reasoning effort control.

OpenAI's most compact and cost-effective GPT-5 model, released August 7, 2025. Designed for high-volume, latency-sensitive applications where the full capabilities of larger models are not required, while maintaining strong performance on common tasks.

GPT-5 Nano is a lightweight, low-latency language model designed for cost-efficient text generation, chat, and tool-calling workloads.

OpenAI's flagship GPT-5 Pro model, released October 6, 2025. A highly capable multimodal model featuring advanced reasoning, native tool use, and strong performance on complex professional and coding tasks. It introduced a structured 'reasoning effort' parameter for controlling response depth.

OpenAI's GPT-5.1 model, released November 13, 2025. Features a strong multimodal and reasoning capabilities, and is optimized for complex agentic workflows. It introduced significant improvements in coding, reasoning, and tool use over previous generations.

The standard 'Thinking' variant of OpenAI's GPT-5.2 model, released Dec 11, 2025. Excels at complex reasoning, coding, and multi-step projects. Optimized for professional knowledge work and serves as the balanced option between speed and capability in the GPT-5.2 family.

OpenAI's flagship GPT-5.2 Pro model, Designed for professional knowledge work and agentic workflows, exclusive 'xhigh' reasoning effort, and top-tier performance on complex reasoning, coding, and scientific benchmarks.

GPT-5.4 is OpenAI's flagship frontier model built for sustained, multi-step reasoning with reliable follow-through. It excels at agentic workflows, research, document analysis, and powering complex internal tools with robust instruction following.

GPT-5.4 Mini is a compact, cost-efficient model designed for reliable performance across high-volume, everyday AI workloads. It offers fast, efficient reasoning, strong multimodal capabilities, and approaches the performance of the larger GPT-5.4 model on coding and agentic tasks while running more than 2x faster than its predecessor.

GPT-5.4 Nano is the smallest and fastest model in the GPT-5.4 lineup, designed for ultra-low latency and low-cost API usage at high throughput. It is optimized for short-turn tasks like classification, extraction, ranking, and lightweight sub-agent work.

GPT-5.4 Pro offers deeper, higher-reliability reasoning for complex production scenarios. It is engineered for high-stakes agentic workflows, long-form analysis and synthesis, complex planning, and advanced reasoning tasks where accuracy is paramount.

GPT-5.5 is a highly capable and efficient model featuring dynamic routing between 'Instant' and 'Thinking' modes. It provides improvements in conceptual clarity, scientific research ability, accuracy during knowledge work, and polished conversational tones.

GPT-5.5 Pro is the highest-capability model in the 5.5 lineup, optimized for the hardest tasks and long-running workflows. It uses significant compute to 'think' harder before answering, making it ideal for deep research, highly complex coding, and extensive multi-step problem solving.

GPT-5.6 Luna is the fastest, most cost-efficient model in the GPT-5.6 family. It is designed for high-volume, latency-sensitive workloads such as classification, data extraction, request routing, and draft generation. It shares the same 1.05M context window as its siblings

GPT-5.6 Sol is the flagship model in the GPT-5.6 family, designed for the most complex reasoning, agentic coding, and deep research tasks. It features a 1.05M token context window and excels in long-horizon, multi-step workflows. It supports advanced features like programmatic tool calling, multi-agent orchestration, and a 'max' reasoning effort

GPT-5.6 Terra is a balanced model in OpenAI's GPT-5.6 series, the balanced workhorse tier of the GPT-5.6 family. Delivers highly reliable performance for everyday professional workflows, code generation, and general-purpose agentic tasks at a lower cost than Sol.

GPT-6 Astra is OpenAI's flagship model, released 3 September 2026. It costs $10 per million input tokens and $50 per million output, with a 1,050,000-token context window and 128,000 max output tokens. It accepts text and images, and supports streaming, function calling and structured outputs.

GPT-Image-2.5 Flare is OpenAI's fast, high-quality image generation and editing model optimized for everyday creative applications and high-volume workloads. It provides improved image quality, instruction following, subject preservation, editing consistency, natural lighting, and richer textures while delivering substantially lower generation latency. Flare is designed for creator content, social media, product experiences, visual search, rapid image prototyping, iterative editing, and applications where speed and image quality are both important.

GPT-Image-2.5 Sunburst is OpenAI's most capable image generation and editing model, designed for premium visual workflows that require high precision, detailed instruction following, and tight control across edits. It delivers sharper details, natural lighting, richer textures, improved subject preservation, stronger layout and text rendering, and reliable multi-turn image editing. Sunburst is optimized for production-ready creative work, polished product imagery, advertising assets, and other complex visual tasks where generation quality and precision are prioritized over latency.

GPT-6 Luna is OpenAI's most efficient GPT-6 model for focused, high-volume workloads. It combines GPT-6 reasoning and agentic capabilities with substantially lower serving cost, making it suitable for scalable automation, coding assistance, information extraction, classification, structured generation, multimodal understanding, and repeatable agent workflows. The model supports a 1.05M-token context window, up to 128K output tokens, configurable reasoning effort, image understanding, function calling, structured outputs, web search, file search, and computer use.

GPT-6 Sol is OpenAI's GPT-6 model designed to balance advanced intelligence, reasoning capability, and cost for demanding production workloads. It is built for complex coding, agentic workflows, professional knowledge work, multimodal understanding, and multi-step task execution. The model supports a 1.05M-token context window, up to 128K output tokens, configurable reasoning effort, image understanding, function calling, structured outputs, web search, file search, and computer use.

GPT-6.1 Sol is OpenAI's advanced reasoning model designed to deliver near-GPT-6 Astra capability at a lower cost for complex coding, computer use, agentic workflows, and professional knowledge work. It supports a 1.05M-token context window and up to 128K output tokens, enabling it to work across large codebases, documents, and long-running multi-step tasks. The model supports configurable reasoning effort, image understanding, function calling, structured outputs, web and file search, code execution, computer use, hosted shell, MCP, and other agentic tools through the Responses API. GPT-6.1 Sol is optimized for applications that require strong reasoning and tool use while balancing capability, speed, and serving cost.

Model	Category	Input	Output	Context	Pricing
OpenAI: GPT 4.1 4405f5a62e9944ac8089cfde28a9f9f2	text	text, image	text	524288	$2.000 in / $8.000 out
OpenAI: GPT 4.1 Mini f76daa821ecd4e968d22ace905d749aa	text	text, image	text	262144	$0.400 in / $1.600 out
OpenAI: GPT 4.1 Nano b77daa107bc84db6af20b3f817962bf3	text	text, image	text	64K	$0.100 in / $0.400 out
OpenAI: GPT 4O ffcedefe6617464da928a4e6ec9c27e0	text	text, image	text	128K	$2.500 in / $10.000 out
OpenAI: GPT 4O Mini 08102505ee584ea2bf1b170c99560a52	text	text, image	text	128K	$0.150 in / $0.600 out
OpenAI: GPT 5 733b10067dde40d9b993261dc92578a9	text	text, image	text	400K	$1.250 in / $10.000 out
OpenAI: GPT 5 Mini e98fe549bd2243a2bf9d987b93b12360	text	text	text	400K	$0.250 in / $2.000 out
OpenAI: GPT 5 Nano 88eab89dcbeb41de98f60a5c2461b2f4	text	text	text	400K	$0.050 in / $0.400 out
OpenAI: GPT 5 Pro 13652b42337c49e7a9ccf92273f944bc	text	text, image	text	400K	$15.000 in / $120.000 out
OpenAI: GPT 5.1 f72df3899b9243a8b7f2228ad17f09e5	text	text, image	text	400K	$1.250 in / $10.000 out
OpenAI: GPT 5.2 71d6e4c904304da485437287639a4869	text	text, image	text	400K	$1.750 in / $14.000 out
OpenAI: GPT 5.2 Pro e4863abbf36c4fc8b10e095cc1aa9b6d	text	text, image	text	400K	$21.000 in / $168.000 out
OpenAI: GPT 5.4 5c1cd1d3945245319c4b898ef93eb7d2	text	text, image	text	1M	$2.500 in / $15.000 out
OpenAI: GPT 5.4 Mini be227f0ef54a41dbae24c531a9463b45	text	text, image	text	400K	$0.750 in / $4.500 out
OpenAI: GPT 5.4 Nano 13010e0601b6411ab7f425cec1e48032	text	text, image	text	400K	$0.200 in / $1.250 out
OpenAI: GPT 5.4 Pro e19bd2eac8cc42278e9b5f8b3999ff7a	text	text, image	text	1M	$30.000 in / $180.000 out
OpenAI: GPT 5.5 16792ede0c4648a78b05ade9a394fa1e	text	text, image	text	1M	$5.000 in / $30.000 out
OpenAI: GPT 5.5 Pro 5d5f62c6558f4de7928c2a8a85d6a67b	text	text, image	text	1M	$30.000 in / $180.000 out
OpenAI: GPT 5.6 Luna 879246ce092641939b978ed09f59d20f	text	text, image	text	1.05M	$0.200 in / $1.200 out
OpenAI: GPT 5.6 Sol 2a2fd76ab1a94ed3a7ff05bdab9feff5	text	text, image	text	1M	$4.000 in / $20.000 out
OpenAI: GPT 5.6 Terra c065f28cc90649289f0b6d2544531d1d	text	text, image	text	1M	$2.000 in / $12.000 out
OpenAI: GPT 6 Astra 9496be150210489fb823a8db29f0f9b4	text	text, image, file	text	1.05M	$10.000 in / $50.000 out
OpenAI: GPT Image 2.5 Flare beefdd1a167a47d7a03c2842db8fc8f1	image	text, image	image	400K	Pricing unavailable
OpenAI: GPT Image 2.5 Sunburst 7876520495db454fb4acf3aa7b1101e8	image	text, image	image	400K	Pricing unavailable
OpenAI: GPT-6 Luna 2df08e9e606e46cd8400c6d770f4721b	text	text, file, image	text	1.05M	$0.100 in / $0.500 out
OpenAI: GPT-6 Sol dd48b9b42c7c48079e99ed0ddcad9275	text	text, image, file	text	1.05M	$2.000 in / $10.000 out
OpenAI: GPT-6.1 Sol 79075688bd234935a916115fcd3ee4d8	text	text, image, file	text	1.05M	$2.000 in / $10.000 out

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