OpenAI AI Updates: August 25, 2026

1. OpenAI Brings the GPT-5.6 Model Family to Kiro

OpenAI. OpenAI made its GPT-5.6 family, including the Sol, Terra, and Luna tiers, available in Kiro, an agentic software development environment spanning IDE, CLI, and web. The company positions the release around price-performance, giving developers three tiers to match intelligence, speed, and cost across planning, building, reviewing, and testing. OpenAI cites Terminal-Bench 2.1 results showing GPT-5.6 Terra completing successful tasks in Kiro at roughly 82 percent lower cost. Source

2. OpenAI Deprecates the Codex mcp-server Command

OpenAI. OpenAI marked the codex mcp-server command as deprecated in the Codex changelog, directing developers to use the Codex app server instead. The change shipped alongside a Codex CLI patch release, version 0.149.1, and affects how developers run Model Context Protocol integrations through the Codex command line. Teams relying on the old command will need to migrate to the app server to keep MCP integrations working. Source