OpenAI

GPT-5.6 Sol is OpenAI's flagship frontier model in the GPT-5.6 family, built to deliver faster, more reliable results for complex professional work. The gpt-5.6 alias routes to Sol. Supports reasoning (none → max), pro mode, vision, tools, and long context.

GPT-5.6 Terra balanced frontier tier for everyday professional work, coding, and multimodal chat.

GPT-5.6 Luna cost-efficient frontier tier for high-volume professional workloads with vision and tools.

Maximum capability variant of GPT-5.5 for research-grade and highest-stakes tasks. No cached-input discount available. Data residency endpoints incur a 10% price uplift.

OpenAI frontier model for complex professional work — strong reasoning, coding, agentic workflows, vision, and 1.05M context. Azure Global Standard.

Premium GPT-5.4 Pro for hardest problems — higher compute, no cached-input discount.

GPT-5.4 production workhorse with strong reasoning, vision, and up to 1.1M context. Azure Global Standard.

Ultra-efficient GPT-5.4 nano tier for high-volume workloads with vision and tools.

Compact GPT-5.4 mini for coding, agentic subtasks, and multimodal chat with long context.

Efficient GPT-5 family model on Azure OpenAI (Global Standard). Balanced reasoning, vision, and tool use at lower cost than GPT-5.

Flagship GPT-5 model — general-purpose frontier reasoning with vision, tools, and long context.

Cheapest model in OpenAI's lineup. $0.10/MTok input is competitive with the cheapest models on the market. Ideal for routing, extraction, and lightweight classification. Remains competitive even after GPT-5.5 launch.

Cost-efficient multimodal GPT-4o mini with vision and tools. Azure OpenAI Global Standard.

Compact o-series reasoning model on Azure OpenAI (Global Standard). Excels at math, coding, and visual reasoning with a 200K context window.

Maximum reasoning capability in OpenAI's lineup. For workloads where correctness is paramount over cost. No cached-input or batch discount available.

o-series reasoning model for complex math, science, coding, and visual reasoning. Succeeded by GPT-5 for many workloads.

Lightweight reasoning model. Positioned between o4-mini and o3 for cost/capability trade-offs. Context window expanded to 200K tokens.

Best value for long-context tasks at low cost. 1M context window at only $0.40/MTok input.

Multimodal GPT-4o chat model with vision, tools, and 128K context. Azure OpenAI Global Standard.

Flagship OpenAI image generation model. Best quality in the GPT Image 1.x lineup; text-to-image, editing, Low/Medium/High quality tiers.

Cost-efficient OpenAI image generation model. Text-to-image and editing via Images API; token-priced text and image modalities.

Ultra-low-cost GPT-5 family model for high-volume lightweight tasks with vision and tools.

Premium GPT-5 Pro tier for hardest problems — higher compute, no cached-input discount on standard pricing.

GPT-5.3 Codex agentic coding model on Azure OpenAI Global Standard (Responses API).

Most capable OpenAI embedding model for English and multilingual semantic search, clustering, recommendations, and classification. Azure OpenAI Global Standard deployment.

Efficient OpenAI embedding model — improved successor to text-embedding-ada-002. Azure OpenAI Global Standard deployment.

Latest OpenAI image generation model. Text-to-image and editing with separate text/image token pricing. Azure Global Standard.

ChatGPT alias for the latest GPT Image model in OpenAI APIs (Standard). Same token pricing as GPT Image 1.5 for text and image modalities.

OpenAI live speech-to-text for realtime transcription sessions. Billed per minute of audio.

High-accuracy OpenAI speech-to-text for file transcription and committed realtime turns. Supports keyword/language hints.

Lower-cost OpenAI speech-to-text for batch file transcription via POST /v1/audio/transcriptions.

Higher-quality OpenAI speech-to-text for file transcription via POST /v1/audio/transcriptions.

OpenAI steerable text-to-speech model (token-priced) via POST /v1/audio/speech.

Cost-efficient GPT Audio for Chat Completions — accepts text/audio inputs and returns text/audio outputs.

Cost-efficient realtime voice model over WebRTC/WebSocket/SIP — text, audio, and image inputs with realtime audio/text outputs.

GPT-5 optimized for agentic coding in Codex / Responses API environments.

GPT-4o speech-to-text with speaker diarization for multi-speaker audio files.

Smaller, cost-efficient GPT-5.1 Codex for agentic coding via the Responses API.

OpenAI video generation model (text/image to video). Billed per second of generated video at 720p.

GPT-5.1 optimized for agentic coding in Codex / Responses API.

GPT-5.1 flagship for coding and agentic tasks with configurable reasoning effort (none to high).

GPT-5.1 Codex variant optimized for long-running agentic coding tasks via the Responses API.

GPT-5.2 frontier chat/reasoning model with vision and tools. Azure OpenAI Global Standard.

GPT-5.2 Codex optimized for agentic coding via the Responses API. Azure Global Standard.

OpenAI GPT Audio 1.5 for Chat Completions with text/audio inputs and text/audio outputs. Azure Global Standard.

OpenAI realtime voice model 2.1 over WebRTC/WebSocket/SIP with text, audio, and image inputs.

Cost-efficient realtime voice model 2.1 mini with text, audio, and image inputs.