Opus 5 looks like a clear upgrade over 4.8, but still trails Fable 5 for brilliance
bindureddy · x · 2026-07-25
A launch-day take says Opus 5 is a strict improvement over Opus 4.8, but still trails Fable 5 in raw brilliance.
- The author estimates Opus 5 is about 15% more expensive than 4.8 on similar tasks.
- They say it is better than 4.8, so it is a clear upgrade.
- However, they still prefer Fable 5 for now and plan to use Opus 5 in their agent and ChatLLM setup immediately.
- LiveBench results are said to be coming soon.
Related event: Anthropic Launches Opus 5: Strict Upgrade at 15% Higher Cost(3 posts)→
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