Expired60% confidenceOpinionExact time
OpenAI did not publish official scores for the standard SWBench for GPT-5.2 Codex, suggesting they may not have surpassed Opus 4.5's performance on that benchmark.
2
Sources
60%
Confidence
Medium-term (~90 days)
Relevance
7/2/2026
First Seen
Valid until: 9/30/2026(expired)
Sources
GPT-5.2 Codex vs Opus 4.5 Hands-On: A Comprehensive Comparison of Coding Ability, Speed, and Developer Experience
bilibili晟6668886/6/2026
Related Claims
UnverifiedOpenAI's release materials did not disclose Sol's score on SWE-bench Pro, a benchmark currently led by Fable 5.73% similarUnverifiedFable 5 scored 80.3 on the SWE Bench Pro programming test, while OpenAI's GPT 5.5 scored only 58.6.64% similarPartially VerifiedClaude Opus 4.8 scored 69.2% on the SWE-bench benchmark, compared to 58.6% for GPT 5.5 and 54.2% for Google Gemini.63% similarUnverifiedIn SWE-bench testing, the early GPT-4 resolution rate was below 2%, while Claude 3.5 Sonnet broke through 49%.62% similar
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