Perplexity Sonar Pro launchers
Model key: perplexity_sonar_pro. The Perplexity provider is pinned,
fallbacks are disabled, concurrency is 1, and results are resumable.
Use the same action order documented in scripts/gpt_5_6_sol/README.md,
replacing gpt_5_6_sol in the script path with perplexity_sonar_pro.
Tests 2 and 4 use four non-overlapping batches. Test 3 requires completed
Test 1, and Test 4 Phase 2 requires merged Phase 1 results.
Default safety ceilings are: Test 1 $80; Test 2 $25 per batch; Test 3
$40; Test 4 Phase 1 $8 per batch; Test 4 Phase 2 $30 per batch.