Vercel AI Updates: June 9, 2026

1. AI Gateway Production Index Shows DeepSeek Surge and Anthropic Spend Dominance

Vercel. The June 2026 edition of Vercel’s AI Gateway production index reports that DeepSeek’s share of tokens jumped from under 1% to 17% in a single month while its share of spend stayed near 1%, driven by pricing roughly 20 to 50 times cheaper than comparable Anthropic models. Anthropic’s overall spend share grew from 61% to 65% and held 70 to 80% of spend across high-stakes use cases such as app generation, back office agents, and coding agents. Total tokens grew 20% month over month while spend rose 43%, reflecting teams routing cheaper models for high-volume work and reserving frontier models for quality-critical tasks. Source

2. AI SDK Introduces Experimental Agent Terminal UI Package

Vercel. The AI SDK shipped a new @ai-sdk/tui package at version 1.0.0-canary.1 on June 8, adding an experimental terminal user interface for building AI agents in the command line. The release tracks the latest ai@7.0.0-canary.166 core and arrived alongside a coordinated set of canary and stable updates across the React, Vue, Svelte, and RSC bindings. The same wave included a @ai-sdk/workflow change renaming the onStepFinish callback to onStepEnd. Source