Warp, the AI-native terminal and agentic development environment, has added support for Claude Opus 4.8 , Anthropic's latest flagship model , along with a new Opus 4.8 Fast variant that delivers comparable performance at significantly lower cost. The update lands the same day Anthropic shipped the model publicly, making Warp one of the first agentic coding environments to carry it.

What changed with Opus 4.8

Anthropic upgraded Claude Opus to version 4.8, building on Opus 4.7 with improvements across benchmarks. It's available at the same price as its predecessor. The headline number: Anthropic reports Opus 4.8 is roughly four times less likely than Opus 4.7 to let flaws in code it has written pass unremarked. That's not a minor tweak , it's a fundamental shift in how the model handles uncertainty.

Claude Opus 4.8 has noticeably better judgment. In Claude Code, it asks the right questions, catches its own mistakes, pushes back when a plan isn't sound, and builds up confidence around complex, multi-service explorations before making big changes. Early testers at Devin noted that Opus 4.8 uses tools cleanly and follows instructions with the consistency autonomous engineering workloads need to keep running unattended, and it improves on Opus 4.6 while fixing the comment-verbosity and tool-calling issues seen with Opus 4.7.

The benchmark story

On Anthropic's Super-Agent benchmark, Claude Opus 4.8 is the only model to complete every case end-to-end, beating prior Opus models and GPT-5.5 at parity on cost. On the coding side, Opus 4.8 outperforms GPT-5.5 on at least 12 benchmarks, including agentic coding (SWE-Bench Pro: 69.2% vs. 58.6%) and computer use (OSWorld-Verified: 83.4% vs. 78.7%).