Looks like certain times on Friday and Saturday you would need Peacock Premium. The regular Peacock is free.
Thursday, July 15
1:30-4AM (Peacock Premium): Day 1, The Open, live coverage
4AM-3PM (GC and Peacock Premium, simulcast): Day 1, The Open, live coverage
3AM-3PM (Peacock): Day 1, The Open, featured groups (TBD)
5:30AM-3PM (Peacock): Day 1, The Open, featured holes (Nos. 14-16)
3-4PM (Peacock Premium): Day 1, The Open, live coverage
3-5PM (GC): Live From The Open
Friday, July 16
1:30-4AM (Peacock Premium): Day 2, The Open, live coverage
4AM-3PM (GC and Peacock Premium, simulcast): Day 2, The Open, live coverage
3AM-3PM (Peacock): Day 2, The Open, featured groups (TBD)
5:30AM-3PM (Peacock): Day 2, The Open, featured holes (Nos. 14-16)
3-4PM (Peacock Premium): Day 2, The Open, live coverage
3-5PM (GC): Live From The Open
Saturday, July 17
5-7AM (GC and Peacock Premium, simulcast): Day 3, The Open, live coverage
6AM-2PM (Peacock): Day 3, The Open, featured groups (TBD)
7AM-1PM (Peacock): Day 3, The Open, featured holes (Nos. 14-16)
7AM-3PM (NBC and Peacock Premium, simulcast): Day 3, The Open, live coverage
3-4PM (GC): Live From The Open
Sunday, July 18
4-7AM (GC and Peacock Premium, simulcast): Day 4, The Open, live coverage
5AM-1PM (Peacock): Day 4, The Open, featured groups (TBD)
6AM-Noon (Peacock): Day 4, The Open, featured holes (Nos. 14-16)
7AM-2PM (NBC and Peacock Premium, simulcast): Day 4, The Open, live coverage
2-3PM (GC): Live From The Open