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ARC Prize Just Fact-Checked OpenAI's 99.9% — GPT-6 Astra Really Scored 62.7%

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  When OpenAI launched GPT-6 Astra on September 3, 2026, one number stole the show: 99.9% on ARC-AGI-3, the benchmark designed to be nearly impossible to game. Nvidia CEO Jensen Huang cited it days later when he declared on X that "AGI has arrived." Now the people who actually run that test have checked OpenAI's homework — and the number came back very different. What ARC Prize actually found The ARC Prize Foundation independently reran Astra on ARC-AGI-3 and scored it at 62.7% on its standard, provider-neutral harness — the same setup every other lab's model must clear. On OpenAI's own provider-adapter harness, the same model scored 98.6% at maximum effort and 99.9% at high effort. Same model, same effort, different scaffolding: 36 to 45 points of difference. ARC Prize's verdict was blunt: the 99.9% figure is not a comparable score, because it was not produced under the conditions every other model faces. The foundation published both runs. Why the harness ch...

AI Tools Every Writer Should Use in 2026

AI tools every writer needs in 2026 — a writer at a desk with an AI robot assistant, laptop and floating pages

 AI tools now cover every stage of writing: the first draft, the long middle, the brutal edit, and the final polish. The trick is picking the right tool for each job instead of asking one chatbot to do everything. Here are six tools, matched to the job they actually do best.


For First Drafts and Outlines: ChatGPT


ChatGPT is still the best place to start. Its free tier handles brainstorming, outlines, and rough first drafts in seconds, and Plus (around $20 a month) adds more capable models and higher limits. Its honest limit is facts — it invents details confidently — so verify anything checkable. If your writing leans on research, our ChatGPT vs Perplexity comparison breaks down which assistant handles sourcing better.


For Long-Form Prose: Claude


When the piece gets long — an essay, a chapter, a report — Claude is the stronger draft partner. It holds tone and flow over long documents better than most chatbots, and its prose reads more naturally, with less generic "AI voice" to scrub out later. There is a free tier, and Pro runs around $20 a month.


For Polishing Every Sentence: Grammarly


Grammarly lives where you type — browser, documents, desktop — and catches what your eyes skip: grammar, spelling, and tone. The free plan covers the basics plus 100 AI prompts a month. Pro costs $12 a month billed annually ($30 month-to-month) and adds full-sentence rewrites, tone adjustment, plagiarism checks, and AI-text detection, with 2,000 prompts a month.


For Deep Self-Editing: ProWritingAid


Grammarly polishes sentences; ProWritingAid edits the whole manuscript. Its 25-plus reports flag overused words, repetitive sentence starts, pacing problems, and style issues — the stuff a good editor circles in red pen. It costs around $10 a month billed annually, and a lifetime licence runs around $399. Use it after your draft exists, not before — it is an editor, not a muse.


For Clear, Punchy Sentences: Hemingway Editor


Hemingway does one job brilliantly: it shows you where your writing is hard to read. The free web app highlights dense sentences, passive voice, and adverbs, and gives every passage a readability grade. The desktop app is a one-time $19.99, and Editor Plus (around $10 a month) adds AI rewrites. Warning: short sentences are not always better — use it to spot problems, not to flatten your style.


For Fiction: Sudowrite


Sudowrite is built only for fiction — and that focus shows. Its Story Engine turns your outline, characters, and a sample of your voice into draft chapters; Describe expands a bare sentence into sensory prose; Rewrite offers the same passage in different tones. Pricing starts at $10 a month billed annually ($19 month-to-month), with Professional at $22 and Max at $44 on annual billing. There is no free plan, and it is useless for marketing copy — that is the point.


Our Take: Build Your Own Stack


You do not need all six. Start free: ChatGPT, Grammarly's free plan, and Hemingway's web app cost nothing and already cover drafting, polishing, and clarity. Then add ONE paid tool for your weakest stage. Freelance writers can pair this stack with the AI tools for freelancers, and for job applications, our guide to the best AI resume builders covers that corner too. Prices change fast, so check before you buy.

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