AI Roundup â July 28, 2026
The AI race is no longer just about who has the biggest model. Three moves in the last 24 hours show where the real competition is heading: open weights, aggressive pricing, and vertical specialization.
1. Moonshot open-sources Kimi K3
Moonshot AI released Kimi K3, the first open-source mixture-of-experts model at the 3-trillion-parameter scale. Highlights:
- 1M-token context window
- Native vision support
- Free for commercial use under a revenue cap (under $20M annual revenue)
This is a direct challenge to closed frontier labs â and a gift to the open ecosystem.
2. Anthropic ships Claude Opus 5 at roughly half the price
Anthropic launched Claude Opus 5, positioned at approximately half the price of its Fable 5 competitor while maintaining top-tier reasoning. Pricing pressure at the frontier is accelerating.
3. Microsoft enters AI cybersecurity
Microsoft unveiled Project Perception alongside AI-Cyber-1-Flash, a pair of models aimed at defensive security operations â threat detection, triage, and incident response.
What it means
Open weights are catching up fast, incumbents are forced to reprice, and the next battleground is domain-specific models (security, law, medicine).
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