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Best AI for data analysis (October 3, 2026)

The top models are close on reasoning; the order below follows the live Intelligence Index. Claude states its assumptions most carefully, Gemini handles very long documents well, and ChatGPT has the most mature built-in tools for uploaded data files.

Ranking · medium confidence

(Anthropic) · open ↗ · Careful, assumption-stating reasoning: a good default for rigorous analysis.Free tier: a Sonnet model (usage limits vary by demand)
(Google) · open ↗ · Strong on reasoning benchmarks and handles very long documents well.Free tier: a Flash model (the most generous free tier, with a monthly Deep Research allowance)
ChatGPT (OpenAI) · open ↗ · Best built-in tooling for spreadsheets and data files you upload directly in chat.Free tier: a GPT model with limited messages, then a smaller model
(Perplexity AI) · open ↗ · Good for pulling in current external data and benchmarks to feed the analysis, with citations.Free tier: Sonar (unlimited basic cited searches + a few Pro searches a day)

Medium confidence: based on adjacent benchmarks plus app features. Live where a public measurement exists (official Artificial Analysis indices, refreshed automatically), editorial where it does not. Rankings shift fast - treat this as guidance, not gospel.

Sources: Artificial Analysis Intelligence, Coding and Agentic indices (official, read live via OpenRouter) · LMArena leaderboard (community head-to-head votes)

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