OpenAI
gpt-6-astra
gpt-5.6-terra-es
gpt-5.6-luna-es
gpt-5.6-sol-es
gpt-5.6-terra
gpt-5.6-luna
gpt-5.6-sol
gpt-5.5-r
gpt-5.5
gpt-4.1-nano
gpt-5.5-pro
gpt-5.4-pro
GPT-5.4
gpt-5.4-mini
Our most powerful mini-model to date for coding, computer use, and subagents
gpt-5.4-nano
Our most affordable GPT-5.4-class model for simple, high-volume tasks
gpt-5.3-codex
gpt-5.2-pro
gpt-5.2-codex
GPT-5.2
gpt-5.1-codex-max
gpt-5.1-codex
gpt-5.1-codex-mini
gpt-5.1
gpt-5-pro
gpt-5-codex
GPT-5
gpt-5-mini
gpt-5-nano
gpt-4.1
gpt-4.1-mini
GPT-4O
ChatGPT-4O
GPT-4o-mini
ChatGPT-4O-Mini
OpenAI: GPT OSS 20B
gpt-oss-20b is an open-source 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 low-latency inference and deployability on consumer or single-GPU hardware. The model is trained in OpenAI’s Harmony response format and supports reasoning-level configuration, fine-tuning, and agentic capabilities, including function calling, tool use, and structured outputs.
o3
ChatGPT-O3
o3-mini
ChatGPT-O3-Mini
OpenAI GPT OSS 120B
gpt-oss-120b is an open-source, 117-billion-parameter Mixture-of-Experts (MoE) language model from OpenAI designed for high-reasoning, agentic, and general-purpose production use cases. It activates 5.1 billion parameters per forward pass and is optimized to run on a single H100 GPU with native MXFP4 quantization. The model supports configurable reasoning depth, full chain-of-thought access, and native tool usage, including function calling, browsing, and structured output generation.