GPT-5.3 Instant
OpenAI·
LLMsflagshipcloud
Overview
Fast everyday model with reduced hallucinations and improved web search.
Capabilities and innovations
Reduced hallucinationsImproved web searchNatural conversationCreative writing26.8% Hallucination Reduction (web)19.7% Hallucination Reduction (internal)Balanced Reasoning + Search
Benchmarks
No benchmark values are recorded for this model.
- GPQA Diamond: not reported by the vendor
- Humanity’s Last Exam (no tools): not reported by the vendor
- SWE-bench Verified: not reported by the vendor
- SWE-bench Pro: not reported by the vendor
- MMLU: not reported by the vendor
- MMLU-Pro: not reported by the vendor
- Terminal-Bench 2.x: not reported by the vendor
- MMMU-Pro: not reported by the vendor
Links
More from OpenAI
Data curated by AI Model Timeline. See the methodology for admission criteria, benchmark eras and source priority.