Claude Opus 4.8 vs GPT 5.5 vs Gemini 3.1 Pro – Complete breakdown of latest AI release

Anthropic has officially launched Claude Opus 4.8 – a direct challenger to OpenAI’s GPT-5.5 and Google’s Gemini 3.1 Pro. The release comes with a primary focus on agentic coding, large-scale automation and improved reasoning. The company also says the new model is significantly ‘more honest and less likely to make unsupported claims during complex workflows’.

According to Athropic, Opus 4.8 is available globally immediately and keeps the same pricing structure as Opus 4.7 despite broad capability upgrades.