Claude Opus 4.7

Claude Opus 4.7 was Anthropic's flagship from April 17, 2026 until Opus 4.8 succeeded it on May 28, 2026. It introduced a 1 million token context window at the same API pricing as 4.6, alongside gains on reasoning, math, and SWE-bench. It remains available on the API at $5 input and $25 output per million tokens, with cache reads at $0.50 and Batch at $2.50 and $12.50, and is a solid choice for long-context code work, multi-document analysis, and agent workflows that span hours of tool calls. One billing note that does not show on the rate card: 4.7 was the first Claude to ship the newer tokenizer, which produces roughly 30 percent more tokens for the same text, so a port from 4.6 can cost more per request at an identical per-token price. Fast mode is not offered on 4.7 and requests that ask for it return an error.