Introducing Claude Opus 4.8
- Source
- anthropic.com
- Author
- Anthropic News
- Date
If you're building coding agents or long-running agentic workflows on Claude, the new effort-level controls, dynamic workflows mode, and a fast/cheap tier let you tune latency, cost, and reasoning depth per task without switching models.
- inference — Running a trained model to get answers — the phase where AI is actually used, as opposed to trained.
“We’re upgrading Claude Opus to a new version: Claude Opus 4.8. It builds on Opus 4.7 with improvements across benchmarks, and is a more effective collaborator. It’s available today for the same price.”
“And fast mode for Opus 4.8—where the model can work at 2.5× the speed—is now three times cheaper than it was for previous models.”
“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.”
Tom Pritchard
“On our 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.”
Kay Zhu
“Claude Opus 4.8 is the strongest computer-use and browser-agent model we’ve tested, scoring 84% on Online-Mind2Web, which is a meaningful jump over both Opus 4.7 and GPT-5.5.”
Miguel Gonzalez
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