Well, it depends. Just recently I had Opus 4.1 spend 1.5 hours looking at 600+ sources while doing deep research, only to get back to me with a report consisting of a single sentence: "Full text as above - the comprehensive summary I wrote". Anthropic acknowledged that it was a problem on their side but refused to do anything to make it right, even though all I asked them to do was to adjust the counter so that this attempt doesn't count against their incredibly low limit.