More Models from OpenAI
Compare other engines available in this laboratory.
OpenAI's flagship September 2026 frontier model with a 1.05M context window, MoE architecture, and SOTA reasoning across coding, formal mathematics, and long-horizon agentic automation.
GPT-6.1 Sol is OpenAI's mid-tier GPT-6-series flagship (released Sept 29, 2026, ~7 days after GPT-6 Sol), delivering "near-Astra" agentic coding, computer-use and document-heavy performance at $2/$10 per 1M tokens with a 1.05M-token context window and native image input. It replaces GPT-6 Sol in ChatGPT Work/Codex and the API slug gpt-6.1-sol.
GPT-6 Sol is OpenAI's mid-tier, cost-efficient high-end GPT-6 model (launched 22 Sept 2026, ~three weeks after flagship GPT-6 Astra), exposing a 1,050,000-token context window, 128K max output, image input, selectable reasoning effort, and hidden test-time reasoning tokens at $2/$10 per 1M tokens — positioned between GPT-6 Astra (quality) and GPT-6 Luna (throughput/price).