Anthropic Releases Claude Opus 5, Holding Price Flat While Claiming a Coding-Benchmark Jump

Anthropic on July 24 released Claude Opus 5, positioning it as a major advance for its top tier aimed at long-running agents, coding, and professional work. The pricing is unchanged from the prior Opus generation at $5 per million input tokens and $25 per million output tokens. The model ships with a one-million-token context window as both the default and the maximum. Extended reasoning is now on by default.

The main claims concern code and agents. Anthropic reports Opus 5 scoring 43.3 percent on Frontier-Bench v0.1, an agentic terminal-coding benchmark, against 18.7 percent for Opus 4.8, and 70.57 percent on OSWorld 2.0 for computer use. On the abstract-reasoning test ARC-AGI-3, third-party and vendor figures put Opus 5 at 30.2 percent, well above the roughly 7.8 percent attributed to the next-best system and about 1.5 percent for Opus 4.8.

These are vendor-reported numbers on benchmarks that are new and, in the case of Frontier-Bench v0.1, controlled by parties with a stake in the result. None have been independently reproduced. The size of the ARC-AGI-3 gap warrants caution until outside labs run the test, because a twentyfold increase over a six-month-old model more often indicates a benchmark that rewards a specific agent setup than a genuine gain in reasoning.

Russian-language coverage from AI ML Big Data repeated Anthropic's description of Opus 5 as state-of-the-art for software engineering and agentic tasks. The flat pricing is the more concrete signal for engineers. Capability is being added at the same token cost, continuing the pattern of each Opus generation delivering more per dollar rather than charging a premium.