GPT 5.6 Document Understanding Eval
llama_index · x · 2026-07-10
LlamaIndex conducted a day 0 ParseBench test on OpenAI's newly released GPT 5.6 to evaluate its improvements in document understanding. Results show that the new model family continues to excel at reading text and tables but still struggles with charts and layout comprehension.
The post also notes that Luna costs about 1/6 of Sol but only brings a slight drop across ParseBench metrics, indicating that more inference tokens do not necessarily yield proportional improvements in visual understanding.
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