Frontier lab releases, open-source checkpoints, multimodal systems, inference stacks, and model capability shifts.
AI Release Tracker says GLM-5.3-Flash is the newest tracked frontier model
OpenAI Release Tracker lists Z.ai's GLM-5.3-Flash as the most recently tracked frontier model, with a release date of 2026-08-26. The page positions itself as a frontier model release timeline rather than a lab announcement.
Mungomash roundup lists several August 2026 frontier releases
OpenA frontier-model roundup published on Mungomash lists Anthropic Claude Fable 5, OpenAI GPT-5.6, Google Gemini 3.7 Flash, xAI Grok 4.6, Meta Muse Spark 1.2, DeepSeek-V4-Pro, Mistral Medium 3.5, and Qwen3.8-Max as current releases. The page says its model snapshot was last updated on 2026-08-29.
AI Wiki timeline points to GPT-5.5, Claude Fable 5, and Gemini 3.5 Flash as generally available flagships
OpenAI Wiki's July 2026 timeline says the newest generally available flagships include OpenAI GPT-5.5, Anthropic Claude Fable 5, and Google DeepMind Gemini 3.5 Flash. It also notes newer variants in preview or alongside the flagship lines.
