OpenAI's DevDay 2026 brings dots agents, GPT-6.1 Sol, and Ultrafast speed tier

OpenAI announced more than 20 updates at DevDay 2026, including dots always-on agents, GPT-6.1 Sol, Ultrafast token generation, ChatGPT Space, and a $500/month Pro 500 plan. GPT-6.1 Sol is priced at $2 input and $10 output per 1M tokens and is available in the API as gpt-6.1-sol. Ultrafast generates tokens up to 8x faster in Codex and up to 6x faster in the API.