GPT-5.3-Codex is OpenAI's most capable agentic coding model to date, optimized for agentic coding tasks in Codex and similar environments. Supports low/medium/high/xhigh reasoning effort.

gpt-5.3-codex

GPT-4o ("o" for "omni") is a fast, general-purpose multimodal model. It accepts both text and image inputs, and produces text outputs.

gpt-4o

Controls the creativity of responses. Higher values (e.g., 0.7) increase creativity; lower values (e.g., 0.2) make responses more predictable.

Specifies the maximum number of text units (tokens) allowed in a response, limiting its length.

Lists tool definitions or capabilities available to the model.

Decides whether to use tools or just the model for generating responses.

Defines the format or type of the generated response.

Enables parallel execution of tools, allowing multiple tools to run simultaneously.

Sends the response in real-time as it's being generated.

GPT-4o mini (“o” for “omni”) is a fast, affordable small model for focused tasks. It accepts both text and image inputs, and produces text outputs (including Structured Outputs). It is ideal for fine-tuning, and model outputs from a larger model like GPT-4o can be distilled to GPT-4o-mini to produce similar results at lower cost and latency.

gpt-4o-mini

GPT-4.1 is our flagship model for complex tasks. It is well suited for problem solving across domains.

gpt-4.1

GPT-4.1 mini provides a balance between intelligence, speed, and cost that makes it an attractive model for many use cases.

gpt-4.1-mini

GPT-4.1 nano is the fastest, most cost-effective GPT-4.1 model.

gpt-4.1-nano

GPT-5 model which is fast, Intelligent model for all purpose tasks. It accepts both text and image inputs, and produces text outputs.

gpt-5

Controls the level of reasoning used by the model.

GPT-5-mini model which is fast, Intelligent model for all purpose tasks. It accepts both text and image inputs, and produces text outputs.

gpt-5-mini

GPT-5-nano model which is fast, Intelligent model for all purpose tasks. It accepts both text and image inputs, and produces text outputs.

gpt-5-nano

GPT-5.1 is a frontier-grade OpenAI model with stronger general-purpose reasoning and better instruction following than GPT-5. It accepts text and image inputs and produces text outputs.

gpt-5.1

GPT-5.2 is our best general-purpose model, part of the GPT-5 flagship model family. Our most intelligent model yet for both general and agentic tasks

gpt-5.2

Controls how concise or detailed the generated response should be.

GPT-5.5 is OpenAI's most advanced frontier model, optimized for complex real-world work including agentic reasoning, long-context workflows, tool use, and high-performance code generation. It can plan, execute, and complete multi-step tasks with minimal guidance while maintaining strong context over long durations.

gpt-5.5

Controls how much reasoning effort the model applies before generating a response.

Controls the level of detail and length of the generated responses.

GPT-5.4 mini is a fast, cost-efficient, tool-capable model designed for scalable agent workflows and real-time automation.

gpt-5.4-mini

GPT-5.4 nano is an ultra-fast, low-cost model optimized for simple tasks, high-scale automation, and lightweight tool usage.

gpt-5.4-nano

GPT-5.4 is our most advanced general-purpose model in the GPT-5 family. Optimized for complex reasoning, long-context agentic workflows, multimodal processing, and superior code generation.

gpt-5.4

GPT-5.5 Pro uses more compute to think harder and provide consistently better answers.

gpt-5.5-pro

GPT-5.6 Luna is OpenAI's fastest and most affordable model in the GPT-5.6 family. Built for high-volume, latency-sensitive workloads like chat, classification, and lightweight agentic tasks, it delivers strong reasoning at the lowest cost in the lineup — with a 1M+ token context window and 128K max output.

gpt-5.6-luna

GPT-5.6 Sol is OpenAI's flagship frontier model for complex reasoning and professional work. 1.05M context, knowledge cutoff Feb 2026.

gpt-5.6-sol

Specifies the maximum number of tokens allowed in a response.

Sends the response in real-time as it is being generated.

GPT-5.6 Terra balances intelligence and cost in the GPT-5.6 family. 1.05M context, knowledge cutoff Feb 2026.

gpt-5.6-terra

GPT-6 Astra is OpenAI's most capable broadly deployed model, built for the hardest end-to-end work. It excels at complex reasoning, coding, computer use, research, and document creation, and is OpenAI's first model to reach the Critical level of cybersecurity capability under its Preparedness Framework.

gpt-6-astra

gpt-4o-2024-08-06 model which is fast, Intelligent model for all purpose tasks. It accepts both text and image inputs, and produces text outputs.

gpt-4o-2024-08-06

gpt-4o-mini-2024-07-18 is a fast, affordable small model for focused tasks. It accepts both text and image inputs, and produces text outputs (including Structured Outputs). It is ideal for fine-tuning, and model outputs from a larger model like GPT-4o can be distilled to GPT-4o-mini to produce similar results at lower cost and latency.

gpt-4o-mini-2024-07-18

The o1 series of models are trained with reinforcement learning to perform complex reasoning. o1 models think before they answer, producing a long internal chain of thought before responding to the user.

o3-mini is our newest small reasoning model, providing high intelligence at the same cost and latency targets of o1-mini. o3-mini supports key developer features, like Structured Outputs, function calling, and Batch API.

o3-mini

o4-mini is our latest small o-series model. It's optimized for fast, effective reasoning with exceptionally efficient performance in coding and visual tasks.

o4-mini

GPT Image 1.5 is our latest image generation model, with better instruction following and adherence to prompts.

gpt-image-1.5

Sets a general size parameter used by selected models or generators.

Controls how many candidate responses are generated for one request.

Sets the output quality level, usually trading speed for fidelity.

GPT Image 1 is a natively multimodal language model that accepts both text and image inputs, and produces image outputs.

gpt-image-1

A cost-efficient version of GPT Image 1. It is a natively multimodal language model that accepts both text and image inputs, and produces image outputs.

gpt-image-1-mini

You are the world's best creative graphic designer and illustration specialist with industry experience of two decades.

Model	Context	Max output	Input	Output	Capabilities
gpt-4o Chat	—	16K	$2.50	$10.00	Vision, Tools, System prompt
gpt-4o-mini Chat	128K	8K	$0.15	$0.60	Vision, Files, Tools, System prompt
gpt-4.1 Chat	1.0M	33K	$2.00	$8.00	Vision, Files, Tools, System prompt
gpt-4.1-mini Chat	1.0M	33K	$0.40	$1.60	Vision, Files, Tools, System prompt
gpt-4.1-nano Chat	1.0M	33K	$0.10	$0.40	Vision, Files, Tools, System prompt
gpt-5 Chat	400K	128K	$1.25	$10.00	Vision, Files, Tools, System prompt, Reasoning
gpt-5-mini Chat	400K	128K	$0.25	$2.00	Vision, Files, Tools, System prompt, Reasoning
gpt-5-nano Chat	400K	128K	$0.05	$0.40	Vision, Files, Tools, System prompt, Reasoning
gpt-5.1 Chat	400K	128K	$1.25	$10.00	Vision, Files, Tools, System prompt, Reasoning
gpt-5.2 Chat	400K	128K	$1.75	$14.00	Vision, Files, Tools, System prompt, Reasoning
gpt-5.5 Chat	1.1M	200K	$5.00	$30.00	Vision, Files, Tools, System prompt, Reasoning
gpt-5.4-mini Chat	400K	128K	$0.75	$4.50	Vision, Files, Tools, System prompt, Reasoning
gpt-5.4-nano Chat	400K	128K	$0.20	$1.25	Vision, Files, Tools, System prompt, Reasoning
gpt-5.4 Chat	600K	200K	$2.25	$18.00	Vision, Files, Tools, System prompt, Reasoning
gpt-5.5-pro Chat	400K	128K	$30.00	$180.00	Vision, Files, Tools, System prompt, Reasoning
gpt-5.6-luna Chat	1.1M	128K	$0.20	$1.20	Vision, Files, Tools, System prompt, Reasoning
gpt-5.6-sol Chat	1.1M	128K	$5.00	$30.00	Vision, Files, Tools, System prompt, Reasoning
gpt-5.6-terra Chat	1.1M	128K	$2.00	$12.00	Vision, Files, Tools, System prompt, Reasoning
gpt-6-astra Chat	1.1M	—	$10.00	$50.00	Vision, Files, Tools, System prompt
gpt-4o-2024-08-06 Completion	128K	16K	$2.50	$10.00	Vision, Tools, System prompt
gpt-4o-mini-2024-07-18 Completion	128K	8K	$0.15	$0.60	Vision, Tools, System prompt
o1 Reasoning	200K	100K	$15.00	$60.00	Vision, Files, Tools, System prompt, Reasoning
o3-mini Reasoning	200K	100K	$1.10	$4.40	Files, Tools, System prompt, Reasoning
o4-mini Reasoning	200K	100K	$1.10	$4.40	Vision, Files, Tools, System prompt, Reasoning
gpt-image-1.5 Image	—	—	—	—	Vision
gpt-image-1 Image	—	—	—	—	Vision
gpt-image-1-mini Image	—	—	—	—	Vision
gpt-image-2-2026-04-21 Image	400K	228K	$8.00	—	Vision, Files, Tools, System prompt, Reasoning

gpt-5.3-codex

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