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Same prompt
What are the taxes in Brazil?

OpenAI
Brazil corporate tax is 34%

Claude
Depends on regime and company type

Perplexity
Federal + state taxes may apply
Models sound right — but miss key assumptions

• “34%” alone is incomplete and can mislead decisions
• Brazil tax analysis depends on regime, taxpayer type, and transaction
• Relevant buckets may include IRPJ, CSLL, PIS/COFINS, ICMS, ISS, IPI, and withholding depending on the facts
→ This answer is unsafe to rely on without additional facts