GPT-5.2 (xhigh) vs Claude Opus 4.5: Which Large Language Models is Best?

Verdict: GPT-5.2 (xhigh) wins by 1 points.

GPT-5.2 (xhigh) takes the lead in this comparison, scoring 51 points to Claude Opus 4.5's 50. This 1-point gap suggests that GPT-5.2 (xhigh) slightly edges out its competitor in general intelligence.

For users focused on reasoning, coding capabilities, GPT-5.2 (xhigh) from OpenAI currently represents the state-of-the-art. Its higher Elo score indicates greater consistency across our benchmark set.

However, Claude Opus 4.5 remains a formidable contender. Ranked #2, it is a top-tier choice. Depending on your specific needs—such as licensing (Proprietary) or ecosystem integration—Claude Opus 4.5 may still be the right tool for your pipeline.

Comparison Data

Feature	GPT-5.2 (xhigh)	Claude Opus 4.5
Rank	#1	#2
Score	51	50
Developer	OpenAI	Anthropic
License	Proprietary	Proprietary

Conclusion

Both models are excellent choices within the Large Language Models landscape. We recommend checking the full leaderboard for the most up-to-date rankings as new models are released frequently.