← Claude Opus 4.8 · API · High effort (default)
Evidenceacceptedindependent_lab
GPQA Diamond
Artificial Analysis — GPQA Diamond (Opus 4.8 max)
ev_2026_07_opus48_aa_gpqa
Result
92.02%
Confidence A
- Tested
- 2026-06-01
- Runs
- 1
Configuration
How it was measured
- Exact model
- claude-opus-4-8
- Reasoning
- max
- Agent harness
- none
- Tool access
- none
- Prompting
- AA standard GPQA Diamond
PRIMARY INT — independent AA GPQA Diamond.
Caveats
Known limitations
- GPQA near-saturated at frontier; use peer comparison for ranking.
Weighting
Evidence weight factors
The engine weights each evidence row by these factors (0–1) when fusing scores — higher is more trusted.
relevance0.95
quality1.00
recency0.95
health0.75
comparability0.90
reliability0.85
Benchmark
GPQA Diamond
Graduate-level science questions (biology, physics, chemistry) designed to be Google-proof; Diamond is the hardest subset where PhD experts score ~65%.
Benchmark source →