What Changed in AI in the Last 90 Days (Quick Round-up)

The shifts that actually matter for builders - late May to mid-August 2026 The last three months did not produce a single "GPT-5 moment." There was no single release that reset the conversation the way earlier step-changes once did. Instead, the ground moved in several places at once: a wave of frontier and open-weight model launches in July, growing candor about how badly long-context windows actually hold up, and a genuinely uncomfortable security story out of xAI's new agent product. Here's the short, opinionated version of what actually changed for people who ship AI systems. 1. Models & Capability GPT-5.6 (OpenAI) shipped in three tiers - Sol, Terra, and Luna after a government review, with the fastest tier reportedly hitting 750 tokens/sec on Cerebras hardware and a new "Ultra" mode for maximum reasoning effort. Anthropic's lineup grew fast: Opus 5 landed at unchanged Opus pricing ($5/$25 per million tokens), reportedly within half a point of a rival's benchmark peak at half the per-task cost, alongside a new Sonnet 5 and a higher "Fable 5" tier. xAI iterated twice: July's Grok 4.5 (1.5T parameters, trained partly on coding-agent interaction data) was followed by Grok 4.6 on August 12 - a 500K-token-context model aimed at coding and long-running agents, priced at $2/$6 per million tokens standard and $4/$12 for long-context requests. Google's Gemini Flash line saw three releases in quick succession - 3.5, 3.6, and then 3.7 Flash - each undercutting the last on price. 3.6 Flash alone cut output pricing from $9.00 to $7.50 per million tokens. Open-weight competition intensified: Kimi K3 (Moonshot) became the largest open release yet at 2.8T parameters (104B active via MoE) with a 1M-token window, and it was joined by DeepSeek V4-Pro, the Qwen3.8 series, and GLM-5.3 - plus Inkling (Thinking Machines), a 975B open-weight MoE trained on 45 trillion multimodal tokens. One-line interpretation: The capability ceiling is still rising, but the more interesting number th