Models

GPT-6 Luna Decisions is GPT-6 Luna served through OpenAI's Decisions API. Instead of generating text, it reads the content passed as `state` (text, JSON, or images) and returns typed, probabilistic answers to named questions in a single request: the probability of yes for a yes/no question (`noul`), a probability for every option plus the most likely one (`choice`), or a probability for every level of an ordered rubric plus the expected score (`score`). It is built for classification, routing, moderation, and rubric grading where application code thresholds the returned numbers rather than parsing a chat reply. A request can carry up to 200 questions about the same content.

by OpenAIOct 6, 20261.1M context$0.10/M input$0.00/M output

GPT-6.1 Sol is an upgrade to GPT-6 Sol from OpenAI, positioned below the flagship GPT-6 Astra in the GPT-6 series.

by OpenAISep 29, 20261.1M contextfrom $1.00/M inputfrom $5.00/M output544.9B tokens

GPT-6.1 Sol Pro is the same underlying model as GPT-6.1 Sol, served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks.

by OpenAISep 29, 20261.1M contextfrom $1.00/M inputfrom $5.00/M output

GPT-6 Luna is the fast, cost-efficient model in OpenAI's GPT-6 series, positioned below GPT-6 Sol.

by OpenAISep 22, 20261.1M contextfrom $0.05/M inputfrom $0.25/M output336.3B tokens

GPT-6 Luna Pro is the same underlying model as GPT-6 Luna, served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks.

by OpenAISep 22, 20261.1M contextfrom $0.05/M inputfrom $0.25/M output

GPT-6 Sol is the cost-efficient high-end model in OpenAI's GPT-6 series, positioned below the flagship GPT-6 Astra and above the fast GPT-6 Luna tier.

by OpenAISep 22, 20261.1M contextfrom $1.00/M inputfrom $5.00/M output57.8B tokens

GPT-6 Sol Pro is the same underlying model as GPT-6 Sol, served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks.

by OpenAISep 22, 20261.1M contextfrom $1.00/M inputfrom $5.00/M output

GPT Image 2.5 Flare is an image generation and editing model from OpenAI, positioned as the speed-oriented tier of the GPT Image 2.5 series. It is suited to high-volume everyday...

by OpenAISep 8, 2026400K context$8.00/M input$30.00/M output

GPT Image 2.5 Sunburst is an image generation and editing model from OpenAI, positioned as the precision-oriented tier of the GPT Image 2.5 series. It is suited to detailed creative...

by OpenAISep 8, 2026400K context$8.00/M input$30.00/M output

GPT-6 Astra Pro is the same underlying model as GPT-6 Astra, served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks.

by OpenAISep 4, 20261.1M contextfrom $5.00/M inputfrom $25.00/M output

GPT-6 Astra is OpenAI's flagship model for demanding end-to-end work.

by OpenAISep 3, 20261.1M contextfrom $5.00/M inputfrom $25.00/M output350.3M tokens

GPT-5.6 Luna is a fast, cost-efficient model in OpenAI's GPT-5.6 series. It is suited for high-volume, latency-sensitive tasks such as chat, classification, and lightweight agentic workflows, providing capable reasoning for its price tier.

by OpenAIJul 9, 20261.1M contextfrom $0.10/M inputfrom $0.60/M output68.6M tokens

GPT-5.6 Luna Pro is the same underlying model as GPT-5.6 Luna, served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks.

by OpenAIJul 9, 20261.1M contextfrom $0.10/M inputfrom $0.60/M output

GPT-5.6 Sol is the flagship model in OpenAI's GPT-5.6 series. It is suited for complex reasoning, coding, and agentic workflows, and is particularly strong at command-line and multi-step coding tasks and long-horizon problem solving.

by OpenAIJul 9, 20261.1M contextfrom $2.00/M inputfrom $10.00/M output64B tokens

GPT-5.6 Sol Pro is the same underlying model as GPT-5.6 Sol, served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks.

by OpenAIJul 9, 20261.1M contextfrom $2.00/M inputfrom $10.00/M output

GPT-5.6 Terra is a balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It is suited for everyday coding, reasoning, and agentic tasks where capability and cost need to be balanced, offering strong performance at roughly half the cost of Sol.

by OpenAIJul 9, 20261.1M contextfrom $1.00/M inputfrom $6.00/M output4.3B tokens

GPT-5.6 Terra Pro is the same underlying model as GPT-5.6 Terra, served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks.

by OpenAIJul 9, 20261.1M contextfrom $1.00/M inputfrom $6.00/M output

OpenAI's speech-to-speech model for low-latency voice conversations over the Realtime API.

by OpenAIJul 6, 2026128K context$4.00/M input$24.00/M output

A cost-efficient version of GPT Realtime 2.1 for low-latency voice conversations over the Realtime API.

by OpenAIJul 6, 2026128K context$0.60/M input$2.40/M output

A cost-efficient variant of GPT Image 1 for high-quality image generation at reduced latency and cost via OpenAI's dedicated Images API.

by OpenAIJun 23, 2026400K context$2.50/M input$8.00/M output