Agents & dev tools · 28 October 2026
Available nowAnthropic details Opus 5.5 launch and Claude shipping model
Anthropic said Opus 5.5 is the current #1 LLM and runs cheaper than prior Opus versions, with savings varying by workload and cached context. The launch also adds API changes to protect model reasoning from extraction.
Benchmarks are the company's own; not independently verified.
Why it matters
Benchmark Claude’s cost per token against prior Opus models; users will expect cheaper, smarter responses.
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