OpenAI

GPT-5.5 is a frontier model released by OpenAI on April 23, 2026. It features a context window of over 1 million tokens—922,000 input tokens and 128,000 output tokens—and supports both text and image inputs. The model scores 88.7% on SWE-bench Verified and 92.4% on MMLU, while reducing hallucinations by 60% compared with GPT-5.4. It excels in agentic coding, computer use, and deep research, while maintaining per-token latency comparable to GPT-5.4.

GPT-5.6 Terra is the balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It is well suited for everyday coding, reasoning, and agentic workflows, offering a strong balance of quality, latency, and cost for general production use.

GPT-5.6 Sol is the flagship model in OpenAI’s GPT-5.6 series. It is specifically designed for complex reasoning, coding, and agentic workflows, and particularly excels at multi-step problem solving, command-line assistance, and high-quality software tasks. This model is recommended when output quality and reliability matter more than raw throughput.

OpenAI's GPT Image 2 raw image model can generate high-quality images based on natural language prompts. It provides a ready-to-use REST inference API, offering excellent performance, no cold start, and affordability.

OpenAI's GPT Image 2 raw image model can generate high-quality images based on natural language prompts. It provides a ready-to-use REST inference API, offering excellent performance, no cold start, and affordability.