Opus 5 is said to be bench-maxxed, but still trails Fable
bindureddy · x · 2026-07-25
The post claims Opus 5 is being “bench-maxxed” to compete with Sol and Kimi K3.
It says the model lands slightly below Fable on LiveBench, but still looks tuned to score better on public first-turn benchmarks, which makes it easier for people to tweet impressive numbers. The author’s bottom line is that it remains a good model, but Fable is still clearly better.
Related event: Claude Opus 5 Accused of Benchmark Gaming, Lags Behind in Real Tests(2 posts)→
More from Models
- OpenAI upgrades Decisions API: 400 questions per call, native voice and image support — OpenAIDevs · 2026-10-26
- Fangcun AI, China's first independent frontier AI safety lab, launches with DeepSeek eval report — JacquesThibs · 2026-10-26
- When AI hits an existential crisis: model confuses itself and everyone else — Ok-Delivery-7437 · 2026-10-26
- Kimi K3.1 Pro tops MathArena open models, closing frontier gap to about 6 months — teortaxesTex · 2026-10-26
- Ruff creator Charlie Marsh: frontier models find infinite bugs in any software — charliermarsh · 2026-10-26
- Dev testing one skill across Opus 5.5 and Sol 6.1 finds instruction following 'all over the map' — lucasmeijer · 2026-10-26