Models

Open GPT reasoning model for self-hosted agents and controllable deployments

gpt-oss-120b is an open-weight, 117B-parameter Mixture-of-Experts (MoE) language model from OpenAI designed for high-reasoning, agentic, and general-purpose production use cases. It activates 5.1B parameters per forward pass and is optimized...

OpenAI o3-mini-high is the same model as [o3-mini](/openai/o3-mini) with reasoning_effort set to high. o3-mini is a cost-efficient language model optimized for STEM reasoning tasks, particularly excelling in science, mathematics, and...

Affordable GPT-4.1 lane for fast coding help and structured extraction

GPT-4.1 Mini is a mid-sized model delivering performance competitive with GPT-4o at substantially lower latency and cost. It retains a 1 million token context window and scores 45.1% on hard...

Open GPT reasoning model for self-hosted agents and controllable deployments

gpt-oss-20b is an open-weight 21B parameter model released by OpenAI under the Apache 2.0 license. It uses a Mixture-of-Experts (MoE) architecture with 3.6B active parameters per forward pass, optimized for...

GPT model for general reasoning, writing, coding, and tool-assisted tasks

Tiny GPT-4.1 option for classification, routing, and very high-volume tasks

For tasks that demand low latency, GPT‑4.1 nano is the fastest and cheapest model in the GPT-4.1 series. It delivers exceptional performance at a small size with its 1 million...

GPT model for general reasoning, writing, coding, and tool-assisted tasks

GPT model for general reasoning, writing, coding, and tool-assisted tasks

Compact GPT model for low-latency assistance and high-volume workloads

The latest GPT-4 Turbo model with vision capabilities. Vision requests can now use JSON mode and function calling. Training data: up to December 2023.

GPT model for general reasoning, writing, coding, and tool-assisted tasks

Small omni GPT for cheap multimodal assistance and production-scale traffic

GPT-4o mini is OpenAI's newest model after [GPT-4 Omni](/models/openai/gpt-4o), supporting both text and image inputs with text outputs. As their most advanced small model, it is many multiples more affordable...

Compact GPT model for low-latency assistance and high-volume workloads

GPT-3.5 Turbo is OpenAI's fastest model. It can understand and generate natural language or code, and is optimized for chat and traditional completion tasks. Training data up to Sep 2021.