Apr 23, 2026
GPT 5.5 evaluated across our benchmark suite
OpenAI released GPT 5.5, and it lands near the top of multiple Vals leaderboards, taking #2 on the overall Vals Index with a meaningful jump over GPT 5.4 (xhigh) in roughly six weeks.
- GPT 5.5 is #1 on CorpFin (68.4%) and #1 on SWE-bench Verified (82.6%).
- It places #2 on Vibe Code Bench (69.8%), #2 on the Vals Multimodal Index (66.9%), and #2 on MedScribe (86.9%).
- Overall, GPT 5.5 places #2 on the Vals Index at 67.8%, showing strong performance across agentic coding, finance, and multimodal domains.
- GPT 5.5 supports a 1M-token context window with up to 128k output tokens and multimodal input (text, image, file).