gpt-5-5-instantGPT-5.5 Instant is OpenAI’s proprietary AI model, released May 5, 2026. Its strongest use case is coding, where it ranks in the 79th percentile of the models Model Beat tracks.
Scores on standardized evaluations. Higher is better — and rank shows where GPT-5.5 Instant lands among all models tracked on Model Beat.
Graduate-level scientific reasoning
Frontier of human expert knowledge
Factual accuracy & hallucination
Scientific research coding
Olympiad-qualifier math
Tool-agent-user reliability
GPT-5.5 Instant is a GPT-family AI model, from OpenAI, released May 5, 2026.
GPT-5.5 Instant is an AI model developed by OpenAI, part of the GPT family, released May 5, 2026.
On standardized evaluations tracked by Epoch AI, GPT-5.5 Instant scores 52.5% on SciCode, 38.0% on SimpleQA Verified, 19.9% on Humanity's Last Exam.
GPT-5.5 Instant is a proprietary model (API access), available through its provider's API rather than as a downloadable open-weight model.
Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Sep 17, 2026.