Compare / Claude Opus 4.7 vs grok-3

Claude Opus 4.7 vs grok-3

5 results from 2 sources that measured both models. Each row is in the source's own units; there is no overall winner.

Claude Opus 4.7
Anthropic · profile
grok-3
xAI · profile
Results compared
5
Shared sources
2
BenchmarkMetricClaude Opus 4.7grok-3
UGI LeaderboardreportedRequested-length error% off the requested word count 1.0%16.0%
UGI LeaderboardreportedStyle adherencescore from 0 to 1 0.410.36
UGI LeaderboardreportedWriting scorescore out of 100 61.458.7
Vectara Hallucination LeaderboardreportedAnswer rate% of documents 98.0%93.0%
Vectara Hallucination LeaderboardreportedHallucination rate% of summaries 12.0%5.8%

Bold green marks the better value on that metric. Where a source reports ranges that overlap, the difference may not be meaningful; see the benchmark page for ranges.