Claude Opus 5 Outscores Fable 5 on Most Benchmarks—At Half the Price

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Claude Opus 5, released July 24, costs $5 per million input tokens—identical to its predecessor Opus 4.8 and exactly half the price of Fable 5—while outperforming Fable 5 on most major benchmarks. Opus 5 scored 43.3% on Frontier-Bench v0.1, an agentic coding evaluation, versus 33.7% for Fable 5 and 34.4% for OpenAI's GPT-5.6 Sol; on ARC-AGI-3, a novel problem-solving benchmark, it scored 30.2% against GPT-5.6 Sol's 7.8%—a gap that's not close. Claude Opus 5 is out today . It’s cheaper for businesses to run than Anthropic’s leading model, Claude Fable 5, which the company had positioned as the everyday frontier product for paying users. What’s more, Opus 5 also outperforms it on significant benchmarks. To understand where Opus 5 fits: Anthropic's lineup runs four tiers. Haiku is fast and cheap. Sonnet is mid-range. Opus is the heavy workhorse. Above that sits the Mythos class—a tier Anthropic introduced this spring—which includes Claude Fable 5 for the public, and Claude Mythos 5, a version with fewer restrictions reserved through Project Glasswing for vetted cybersecurity researchers and critical infrastructure operators.

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Claude Opus 5 outperforms Pebble 5 in most benchmarks while being sold at half the price of $1,500. This news is expected to have a significant impact on the gaming industry, and stock prices of companies related to game development are projected to rise.

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