Claude Haiku 5.5
Anthropic released Claude Haiku 5.5 on Oct 7, its cheapest and fastest small model yet, cutting prices roughly 75% versus Haiku 4.5 and adding an adjustable effort setting to trade cost for intelligence. It also halved Claude Sonnet 5.5 cache-read pricing to $0.10 per million tokens.
Meta and Microsoft pull back on internal Claude use
Both companies are steering employees away from Claude to cut costs and push their own tools: Microsoft's internal Claude spending cap reportedly dropped from $100,000 to around $10,000 per employee, and Meta's Claude Code users roughly halved to 30,000. Both say customer spending on Anthropic's models through their platforms keeps growing even as internal use shrinks.
GPT-6 and Intelligent UI
OpenAI began rolling out GPT-6 across ChatGPT on Oct 7, adding "Intelligent UI" that answers with interactive charts, buttons and forms instead of just text, reaching paid tiers first and Free/Go tiers by Oct 8. The upgrade also speeds up web search responses by 44% and streams answers in real time.
OpenAI's math research push
OpenAI said its models have now contributed to 722 math research manuscripts and formal proofs, developed with an outside math-AI advisory board. It's framing the work as evidence AI can meaningfully assist frontier mathematics.