AI Question Answered
Which AI is best for long documents?
By Council Research TeamUpdated: Jan 27, 2026
Quick Answer
Gemini has the largest window at 2M tokens. Claude at 200K offers the best balance of size and accuracy.
Detailed Answer
For sheer document size, Gemini's 2 million token context window is unmatched and can handle entire codebases or book-length documents. Claude at 200K tokens offers excellent accuracy across its full context, with less degradation on details buried in the middle of long texts. ChatGPT at 128K works for most documents but may miss details in very long inputs. For critical document analysis, Claude's accuracy-per-token is generally the highest.
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