OpenAI releases GPT-5.5 Pro (unknown thinking)

Type: MODEL_LAUNCH
Detection: benchmark
Confidence: high
Status

Related entities

ModelGPT-5.5 Pro (unknown thinking)CompanyOpenAI

Primary source

Epoch AI Benchmarking Hub · epoch.ai/benchmarks ↗

Independent benchmark runs (GPQA Diamond, SWE-bench Verified, FrontierMath, ...) plus externally reported leaderboards and the Epoch Capabilities Index (ECI).