claude-opus-4.8 claude-opus-4.7 gpt-5.5 anthropic altimeter dragoneer greenoaks sequoia andonlabs model-release reinforcement-learning agentic-ai model-evaluation long-context model-optimization fine-tuning multitasking parallel-processing dan_shipper scaling01 zephyr_z9 teortaxes_tex kimmonismus
Anthropic announced a massive $65B Series H financing at a $965B valuation, led by Altimeter, Dragoneer, Greenoaks, and Sequoia, with run-rate revenue surpassing $47B. They launched Claude Opus 4.8, an update to Opus 4.7 featuring "sharper judgment," "more honesty," and longer autonomous work at the same price. Anthropic also introduced Dynamic Workflows in Claude Code, enabling orchestration of hundreds of parallel subagents for large tasks, available in research preview across multiple platforms. Opinions on Opus 4.8 vary, with some praising it as a major leap and others viewing it as incremental or catch-up to OpenAI's GPT-5.5 family.