Opus 4.7 scores lower than 4.6 and 4.5 on SimpleBench

Differences Between Opus 4.7 and Opus 4.8 on MineBench

Reddit r/singularity

Opus 4.8 shows improved build quality and lower cost compared to Opus 4.7 on the MineBench 3D block-structure benchmark, though with some inconsistencies. The model demonstrates streamlined thinking and more efficient inference.

@orca_build: Anthropic’s new Opus 4.8 scores 3.6% lower than GPT 5.5 on Terminal-Bench 2.1… …but it’s noticeably better at UI tasks.…

X AI KOLs Timeline

Anthropic's Opus 4.8 scores 3.6% lower than GPT 5.5 on Terminal-Bench 2.1 but excels at UI tasks; Orca's orchestration enables Codex to delegate UI tasks to Claude Code.

Differences Between Claude Opus 4.8 and Claude Fable 5 on MineBench

Reddit r/singularity

A detailed comparison of Claude Opus 4.8 and Claude Fable 5 on the MineBench benchmark, highlighting trade-offs in inference time, cost, build quality, and prompting sensitivity.

ProgramBench result for Fable 5 is in, doubling Opus 4.8 even with 4.8 fallback "99% of the runs"

Reddit r/singularity

ProgramBench results show Fable 5 achieving double the performance of Opus 4.8, even with fallback to 4.8 in 99% of runs.

DeepSWE Opus 4.8 results have been released.

Reddit r/singularity

The results of DeepSWE Opus 4.8 have been released, showcasing its performance on benchmarks.