Grok supports PDFs, spreadsheets, text, and code archives up to fifty megabytes apiece. The Files API and chat drop-zone both accept PDF, CSV, XLSX, TXT, Markdown, and ZIP archives containing source code . Each file may weigh no more than 50 MB , and spreadsheets should remain below 200 000 rows  to avoid time-outs. When a document is uploaded, Grok auto-invokes a document_search  tool, enabling natural-language Q&A, table stats, and formula explanations. Oversized or unsuppo

Google Antigravity  is live in public preview, giving developers a $0 individual tier with rolling rate limits and agent-first tooling powered by Gemini 3 Pro . Free quotas, time-boxed trials, and startup credits form a patchwork of no-cost pathways that can sustain months of experimentation ahead of paid tiers launching in late 2025 / 2026. Knowing exactly how each route works helps teams schedule sprints, avoid throttling, and prepare budgets before the freemium transition.

Meta is closing 2025 with a wave of targeted deals across its flagship AI smart glasses  and Quest VR headsets , reflecting a strategic push to expand adoption ahead of the January post-holiday slowdown. The offers cover both new and refurbished  devices, with price reductions available through Meta’s own storefront, global marketplaces like Amazon  and Best Buy , and European retailers specializing in smart tech and eyewear. These discounts apply across key Meta form factors