OpenAI and Anthropic weekly: DevDay 2026, Sonnet 5.5, FTC probe

OpenAI announced more than 20 DevDay 2026 updates, including always-on agents on GPT-6 Astra, GPT-6.1 Sol priced at a fifth of Astra's API price, and an Ultrafast tier with up to 8x faster token generation in Codex.

Anthropic launched Claude Sonnet 5.5 at $2/$10 per million tokens, 30%+ faster than Sonnet 5 and with thinking always on. Reuters reported the FTC is probing OpenAI, Anthropic and other labs over rogue AI agents.