OpenAI

GPT-6 Cyber is OpenAI's security-research model for vulnerability research and defensive security work. It supports reasoning and tool use, with a 1.05M-token context window. OpenAI limits access to organizations with Daybreak Red access.

GPT-5.2 Pro is OpenAI's version of GPT-5.2 that uses more compute to think harder on difficult tasks. It accepts text and image input, with a 400,000-token context window and up to 128,000 output tokens. It supports tool use and structured outputs.

GPT-5 Pro is OpenAI's version of GPT-5 that uses more compute to think harder on difficult tasks. It accepts text and image input, with a 400,000-token context window and up to 272,000 output tokens. It supports tool use and structured outputs.

o3-pro is OpenAI's version of o3 that uses more compute to think longer on hard problems. It accepts text and image input, with a 200,000-token context window and up to 100,000 output tokens. It supports tool use and structured outputs.

o3 is OpenAI's reasoning model for math, science, coding and visual analysis. It thinks before it answers and accepts text and image input. It supports tool use and structured outputs, with a 200,000-token context window and up to 100,000 output tokens.

text-embedding-3-large is OpenAI's text embedding model for English and non-English text. It returns 3,072-dimension vectors by default, which the dimensions parameter can shorten, and accepts up to 8,191 input tokens.

text-embedding-3-small is OpenAI's small text embedding model. It returns 1,536-dimension vectors by default, which the dimensions parameter can shorten, and accepts up to 8,191 input tokens.

GPT-6 Luna Decisions is GPT-6 Luna served through OpenAI's Decisions API, returning scores and choices instead of chat text. Each typed question gets a probability, a fixed-set choice or a rubric score. It has a 1,050,000-token context window and takes several questions at once.

GPT-5.6 Terra Pro is OpenAI's GPT-5.6 Terra served with reasoning mode set to pro for higher-quality answers on complex tasks. Pro mode spends far more reasoning tokens than standard GPT-5.6 Terra. It has a 1.05M-token context window and image input.

GPT-6.1 Terra is OpenAI's fast, efficient model for visual reasoning, precise computer use and clear, natural writing. It has configurable reasoning, tool use, image input and a 1.05M-token context window.

GPT-6.1 Terra Pro is OpenAI's GPT-6.1 Terra served with reasoning mode set to pro for higher-quality answers on complex tasks. Pro mode spends far more reasoning tokens than standard GPT-6.1 Terra. It has a 1.05M-token context window and image input.

GPT-6.1 Sol Pro is OpenAI's GPT-6.1 Sol served with reasoning mode set to pro for higher-quality answers on complex tasks. Pro mode spends far more reasoning tokens than standard GPT-6.1 Sol. It accepts text, image and file input and supports function calling.

GPT-6 Luna Pro is OpenAI's GPT-6 Luna served with reasoning mode set to pro for higher-quality answers on complex tasks. Pro mode spends far more reasoning tokens than standard GPT-6 Luna. It accepts text, image and file input and supports function calling.

GPT-6 Sol Pro is OpenAI's GPT-6 Sol served with reasoning mode set to pro for higher-quality answers on complex tasks. Pro mode spends far more reasoning tokens than standard GPT-6 Sol. It accepts text, image and file input and supports function calling.

GPT-6 Astra Pro is OpenAI's GPT-6 Astra served with reasoning mode set to pro for higher-quality answers on complex tasks. Pro mode spends far more reasoning tokens than standard GPT-6 Astra. It accepts text, image and file input and supports function calling.

GPT-6.1 Sol is OpenAI's model for complex coding and agentic work, with performance close to GPT-6 Astra. It has configurable reasoning, tool use, and image input.

GPT-6 Luna is OpenAI's efficient GPT-6 tier for focused, high-throughput tasks. It has configurable reasoning, tool use, image input. It supports streaming and function calling.

GPT-6 Sol is OpenAI's model for complex coding and agentic workflows. It has configurable reasoning, tool use, image input. It is the high-end GPT-6 tier below GPT-6 Astra.

GPT-OSS Safeguard 20B is OpenAI's open-weight safety reasoning model built on gpt-oss-20b (Apache 2.0). It is a 21B-parameter MoE tuned for content classification, input and output filtering, and trust and safety judgments with reasoning traces.

GPT-6 Astra is OpenAI's reasoning and chat model. It accepts text and image input and supports streaming and function calling.

GPT-5.6 Luna is OpenAI's reasoning-focused model in the GPT-5.6 family, built for cost-sensitive workloads. It accepts text and image input. It supports streaming and function calling.

GPT-5.6 Sol is OpenAI's reasoning-focused model in the GPT-5.6 family, with configurable reasoning effort and image understanding. It accepts text, image and file input. It supports streaming and function calling.

GPT-5.6 Terra is OpenAI's reasoning-focused model in the GPT-5.6 family that balances intelligence and cost. It accepts text and image input. It supports streaming and function calling.

GPT-OSS-120b is OpenAI's open-weight mixture-of-experts reasoning model under the Apache-2.0 license. It has 116.8B total and 5.1B active parameters and a 131,072-token context window. It supports function calling and runs on one 80 GB GPU with MXFP4 weights.

GPT-5.3 Codex Spark is OpenAI's low-latency variant of GPT-5.3 Codex, tuned for fast iterative coding in the Codex environment. It is text-only and supports reasoning, streaming and function calling.

GPT-5.3 Codex is OpenAI's Codex-environment variant of GPT-5.3 for agentic coding. It accepts text and image input and supports reasoning, streaming, function calling and structured outputs.

GPT-5.2 Codex is OpenAI's Codex-environment variant of GPT-5.2, tuned for agentic coding workloads. It accepts text and image input and supports reasoning, streaming, function calling and structured outputs.

GPT-5.1 Codex Max is OpenAI's maximum-effort variant of GPT-5.1 Codex for long-horizon agentic coding in the Codex environment. It has extended context and reasoning support, accepts text and image input, and supports streaming and function calling.

GPT-5.4 Mini brings the core capabilities of GPT-5.4 to a faster, more efficient model for high-throughput workloads. It takes text and image input and supports reasoning, coding, tool use and structured output.

GPT-5.5 is OpenAI's flagship model for coding, reasoning and multimodal work, with configurable reasoning effort from none to xhigh. It accepts text and image input. It supports streaming and function calling.

GPT-5.5 Pro is OpenAI's Pro version of GPT-5.5, built for agentic workflows with built-in tools, improved reasoning and stateful context management. It accepts text and image input and supports coding, streaming and function calling.

GPT-5.4 Pro is OpenAI's high-capacity model in the GPT-5 family, with advanced reasoning, broad knowledge and coding proficiency. It accepts text and image input and returns text, with tool-use capabilities.

GPT-5.2 is OpenAI's previous-generation frontier model for professional work, with configurable reasoning effort. It allows 128,000 output tokens and takes text and image input. OpenAI recommends GPT-5.4 for new workloads.

GPT-5.1 is OpenAI's flagship model for coding and agentic tasks, with configurable reasoning effort from none to high. It allows 128,000 output tokens and takes text and image input. It supports streaming, function calling and structured outputs.

GPT-5.1 Codex is OpenAI's version of GPT-5.1 for agentic coding in the Codex environment. It has a 400,000-token input context and 128,000 output tokens, with text and image input. It supports reasoning tokens, streaming, function calling and structured outputs.

GPT-5.1 Codex Mini is OpenAI's smaller version of GPT-5.1 Codex for agentic coding where efficiency matters more than peak capability. It has a 400,000-token input context and 128,000 output tokens, with text and image input. It supports function calling and reasoning tokens.

GPT-5 Codex is OpenAI's version of GPT-5 for agentic coding in Codex and similar environments. It has a 400,000-token input context and 128,000 output tokens, with text and image input. It supports reasoning tokens, streaming, function calling and structured outputs.

GPT-5 Mini is OpenAI's reasoning model for low-latency, high-volume workloads. It allows 128,000 output tokens and takes text and image input. OpenAI recommends GPT-5.4 Mini for most new low-latency workloads.

GPT-5 Nano is OpenAI's fastest GPT-5 model, built for summarization, classification and other simple high-volume tasks. It allows 128,000 output tokens. OpenAI recommends GPT-5.4 Nano for new workloads.

Codex Mini (Latest) is OpenAI's fast reasoning model for the Codex CLI, fine-tuned from o4-mini. It has a 200,000-token input context and 100,000 output tokens. It accepts text and image input and supports streaming, function calling, structured outputs and reasoning tokens.

o4-mini is OpenAI's o-series reasoning model for coding and visual tasks, succeeded by GPT-5 Mini for new workloads. It has a 200,000-token input context and 100,000 output tokens, with text and image input. It supports function calling and structured outputs.

GPT-4.1 Nano is OpenAI's fastest, most cost-efficient GPT-4.1 model, built for low-latency instruction following and tool calling at high volume. It has a 1,047,576-token input context and 32,768 output tokens, with text and image input.

o1 is OpenAI's reinforcement-learning reasoning model for math, science, coding and multi-step analysis. It produces a long internal chain of thought before answering. It has a 200,000-token input context and 100,000 output tokens, with text and image input.

o1-mini is OpenAI's small, faster o-series reasoning model. It is text-only with a 128,000-token input context and 65,536 output tokens. It does not support function calling, structured outputs or predicted outputs. OpenAI recommends o3-mini for higher intelligence.

GPT-4o Mini is OpenAI's fast, small multimodal model for focused tasks. It takes text and image input and returns text, with a 128,000-token input context and 16,384 output tokens. It supports streaming, function calling and structured outputs.

GPT-4o is OpenAI's versatile flagship multimodal model, with the o standing for omni. It takes text and image input and returns text, with a 128,000-token input context and 16,384 output tokens. It supports streaming, function calling and structured outputs.

GPT-5.4 Mini is OpenAI's mini model for coding, computer use and subagents, built for high-volume workloads. It allows 128,000 output tokens and takes text and image input. It supports reasoning tokens, function calling and structured outputs.

GPT-5.4 Nano is OpenAI's GPT-5.4-class model for simple, high-volume tasks such as classification, extraction and ranking. It allows 128,000 output tokens and takes text and image input. It supports function calling and structured outputs.

GPT-5 is OpenAI's previous flagship reasoning model, built for coding and agentic tasks with configurable reasoning effort. It allows 128,000 output tokens and takes text and image input. OpenAI recommends GPT-5.1 for new workloads.

GPT-4.1 is OpenAI's smartest non-reasoning model, built for instruction following and tool calling. It has a 1,047,576-token input context and 32,768 output tokens, and takes text and image input. It supports streaming, function calling and structured outputs.

GPT-4.1 Mini is OpenAI's smaller, faster version of GPT-4.1 with strong instruction following and tool calling. It has a 1,047,576-token input context and 32,768 output tokens. It takes text and image input and supports streaming, function calling and structured outputs.

GPT-5.4 is OpenAI's frontier model for complex professional workloads, with configurable reasoning effort from none to xhigh. It allows 128,000 output tokens and takes text and image input. It supports computer use, MCP and tool search.

GPT-OSS 20B is OpenAI's open-weight reasoning model for agentic tasks and low-latency edge use, under Apache-2.0. It is a mixture-of-experts model with 20.9B total and 3.6B active parameters and a 131,072-token context. It runs within 16 GB of memory with MXFP4 weights.