By Use Case · AI for Creative Writing: Fiction and Poetry
Publishing companies using AI, 2022–2025
CHART 1 · PUBLISHING INDUSTRY TRAJECTORY
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Source: Publishers Weekly annual salary & jobs reports 2022–2025. Tracks share of publishing companies using AI in any business function (editorial, marketing, production, etc.). Adoption more than doubled over three years.
AI Behavior Index
By Use Case · AI for Blog Posts and Article Writing
Average cost per blog post: AI-assisted vs human-only
CHART 1 - THE COST ECONOMICS
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Source: Ahrefs 2025 comprehensive content cost analysis (900,000+ newly created webpages globally; cost data from content teams across multiple industries). AI-assisted blog post: $131 average (4.7× cost efficiency vs human-only); human-only blog post: $611 average. Average cost reduction: $480 per blog post.
AI Behavior Index
By Use Case · AI for Writing: Adoption Overview
Distribution of ChatGPT use cases by category
CHART 1 - HOW PEOPLE ACTUALLY USE CHATGPT
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Source: OpenAI economic research, May 2025 (analysis of 1.5M ChatGPT conversations in collaboration with Harvard and Duke researchers). Separately, Thunderbit citing OpenAI 2026 data reports practical guidance (28.3%), writing and editing (28.1%), and seeking information (21.3%) as the top three use cases. Numbers vary depending on whether "all conversations" or "work-related conversations only" are measured.
AI Behavior Index
By Use Case · AI for Translation and Multilingual Writing
Global AI translation services market, 2025–2035 forecast
Chart 1 · The market trajectory
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AI Behavior Index
By Use Case · AI for Technical Documentation
Mintlify ARR and customer growth, 2023–2025
Chart 1 · Platform growth
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AI Behavior Index
By Use Case · AI for Email Drafting at Work
Global AI email assistant market size, 2023–2026
CHART 1 - THE MARKET
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Source: Coliflo AI email tools comparison 2025 citing industry analysts ($810M in 2024, $880M in 2025); Read AI / Virtual Workforce projections. Note: this is the narrow "AI email assistant" software market — distinct from the broader productivity AI category and from email volume processed (which is dramatically larger).
AI Behavior Index
By Use Case · AI for Academic and Research Writing
Student AI adoption: 2024 vs 2025
CHART 1 - THE ONE-YEAR SHIFT
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Source: HEPI Student Generative AI Survey 2024 and 2025 (UK higher education). The "any AI use" figure rose from 66% to 92%; the "used gen AI for assessments" figure rose from 53% to 88%; "included AI-generated text directly in submitted work" measured at 18% in 2025 (HEPI did not separately report this in 2024). These are self-reported measures, so they likely understate actual use.
AI Behavior Index
By Use Case · AI for Blog Posts and Article Writing
Content marketer AI adoption, 2023–2026
CHART 2 - ADOPTION CURVE
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Source: Siege Media / Affinco surveys 2023–2026. Tracks share of content marketers using or planning to use AI in their content workflows. The 2026 figure of 97% suggests the category has effectively reached saturation.
AI Behavior Index
By Use Case · AI for Translation and Multilingual Writing
Translation accuracy benchmarks (BLEU score)
Chart 2 · Accuracy by tool
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Source: Gitnux 2026 industry benchmarks; published BLEU score evaluations. GPT-4 English-Spanish: 94.2% BLEU (2023). DeepL on medical text: 89.5% accuracy vs Google Translate 76% (same benchmark). Note: BLEU score has known limitations — it measures n-gram overlap with reference translations, not semantic fidelity. Modern LLMs often outperform BLEU rankings on human evaluations.
AI Behavior Index
By Use Case · AI for Email Drafting at Work
Time savings from AI email assistance
CHART 2 - TIME IMPACT
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Source: Google Workspace productivity research (Smart Compose composition time reduction); Microsoft 365 Copilot research (Outlook triage time reduction); chatbot/agent industry research (routine inquiry deflection). Time savings vary considerably by user role and email volume.
AI Behavior Index
By Use Case · AI for Academic and Research Writing
Top student AI use cases in academic work
CHART 2 - WHAT STUDENTS USE IT FOR
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Source: HEPI 2025 plus Gallup April 2026 ("AI is routine for college students"). Top student uses: explaining complex concepts (58%); homework help (64% daily/weekly); checking answers (60%); editing writing (54%); summarizing lectures/notes (54%); generating ideas (49%); research (45%); writing papers directly (36%).
AI Behavior Index
By Use Case · AI for Blog Posts and Article Writing
Hours saved per content creator per week
CHART 3 - TIME SAVINGS
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Source: Ahrefs 2025 content cost analysis. 12.3 hours saved per content creator per week represents the average across surveyed content teams. The compound effect at scale: 60% of US companies use generative AI specifically for content creation per CleverType 2026 analysis.
AI Behavior Index