Claude#6200K token context window (150K words), best for research-heavy long-form, superior reasoning, March 2026 Sonnet 4.6/Opus 4.7 models
AudienceNon-fiction authors, researchers, technical writers needing complex synthesis and long-document coherence
PricingMid-range
StrengthMassive context window holds entire book drafts in memory for consistent argumentation across chapters.
ContextDirect Recommendation