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<div style="display: none; max-height: 0px; overflow: hidden;">Anthropic and OpenAI both released new models within an hour of each other. OpenAI's GPT-6 Sol and Luna are half the price of the promotional β β β β β β β β β β β β β β β β β β β β β β β β β β β β β β β β β β β β β β β β β β β β β β β β β β β β </div>
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<a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fmercury.com%2Fbooks%3Futm_source=tldr%26utm_medium=sponsored_newsletter%26utm_campaign=26q3_brand_campaign%26utm_content=header_books_banking*_belong%26utm_term=2026-09-23_tldr/1/010001a0cddba564-81c7d20e-858f-4242-b372-c728f6d81bcc-000000/wSOFHvgRkWRtFCuQ_h9As5Z8naRLAhSADkKwsESO-L0=452"><img src="https://images.tldr.tech/mercury.png" valign="middle" style="vertical-align: middle !important; height: 100%;" alt="Mercury"></a></td></tr></tbody></table>
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<h1><strong>TLDR <span id="date">2026-09-23</span></strong></h1>
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<strong>Books and banking* belong together (Sponsor)</strong>
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Your books and your banking* have always lived in separate places. Another platform to log into, another set of data to translate across systems. The result: books that reflect last quarter's reality, not today's.<p></p><p>Until now. Mercury Books is <a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fmercury.com%2Fbooks%3Futm_source=tldr%26utm_medium=sponsored_newsletter%26utm_campaign=26q3_brand_campaign%26utm_content=body_intro_intelligent_accounting_built_directly%26utm_term=2026-09-23_tldr/1/010001a0cddba564-81c7d20e-858f-4242-b372-c728f6d81bcc-000000/Ov-ORiRw358p_rBJdrWUb6rdHuZijKw0BX8TRahzYQc=452" rel="noopener noreferrer nofollow" target="_blank"><span>intelligent accounting, built directly into your banking.*</span></a> Transactions are categorized and reconciled automatically as they happen, erasing the manual work from the month-end close, and giving you a real-time view of your financial position.</p>
<p>Sync thousands of external platforms like Stripe, PayPal, and Gusto, and invite your bookkeeper or accountant at no extra cost.</p>
<p><a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fmercury.com%2Fbooks%3Futm_source=tldr%26utm_medium=sponsored_newsletter%26utm_campaign=26q3_brand_campaign%26utm_content=cta_mercury_books%26utm_term=2026-09-23_tldr/1/010001a0cddba564-81c7d20e-858f-4242-b372-c728f6d81bcc-000000/-8PoAM724Mh_ljgGKzWUS9GdeOSSLJnjbK5WgLT9kMc=452" rel="noopener noreferrer nofollow" target="_blank"><span>Explore Mercury Books</span></a></p>
<p><em>*Mercury is a fintech company, not an FDIC-insured bank. Banking services provided through Choice Financial Group and Column N.A., Members FDIC.</em>
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<div style="text-align: center;"><span style="font-size: 36px;">π±</span></div></div>
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<h1><strong>Big Tech & Startups</strong></h1>
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<a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fsimonwillison.net%2F2026%2FSep%2F22%2Fopus-and-sol-and-luna%2F%3Futm_source=tldrnewsletter/1/010001a0cddba564-81c7d20e-858f-4242-b372-c728f6d81bcc-000000/FciUS4Jrxg8ADNJ1f-3Y9I6yzabd9iUnSq6f8yDr72g=452">
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<strong>Claude Opus 5.5, GPT-6 Sol, GPT-6 Luna, and a new price war (6 minute read)</strong>
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Anthropic and OpenAI both released new models within an hour of each other. OpenAI's GPT-6 Sol and Luna are half the price of the promotional pricing for GPT-5.6 equivalents. Opus 5.5 is cheaper per token than Opus 5.0 and has the intelligence of Fable 5.1. It is very token efficient and works across every effort level.
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<strong>Apple Developing New Fitness Tracker Aimed at Rivaling Whoop (5 minute read)</strong>
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Apple is developing a screenless health and fitness tracker as part of an effort to rethink its smartwatch lineup and add new wearable technologies. The project is still in a preliminary phase and likely won't debut before 2028. Apple is working on a major update to its smartwatch lineup for release as early as late 2027.
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<div style="text-align: center;"><span style="font-size: 36px;">π</span></div>
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<h1><strong>Science & Futuristic Technology</strong></h1>
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<a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fwww.sciencealert.com%2Falzheimers-is-no-longer-an-untreatable-disease-major-report-concludes-heres-why%3Futm_source=tldrnewsletter/1/010001a0cddba564-81c7d20e-858f-4242-b372-c728f6d81bcc-000000/fubD7J0ckQiAmVw-yIawBxXZ6P5QVYXgUZxnPMvUjGs=452">
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<strong>Alzheimer's Is No Longer an Untreatable Disease, Major Report Concludes. Here's Why (7 minute read)</strong>
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There are currently hundreds of clinical trials worldwide investigating possible medicines, new diagnostic options, and lifestyle interventions to identify, treat, or delay cognitive decline. The possibility of a cure is still far away, but it now seems more possible than ever before. Alzheimer's disease is being increasingly viewed as a condition for which earlier diagnosis, better understanding of disease biology, and a wider range of interventions may collectively improve outcomes. There is now a genuine case for optimism.
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<a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fwww.therobotreport.com%2Fintrinsic-open-sources-key-parts-platform-easier-development%2F%3Futm_source=tldrnewsletter/1/010001a0cddba564-81c7d20e-858f-4242-b372-c728f6d81bcc-000000/aX6MN2EI_rFz7OKAIwDi53Vk9PygZoA2XcqlMKe6xNM=452">
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<strong>Intrinsic open sources key parts of its platform for easier development (9 minute read)</strong>
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Intrinsic Core is an open source set of Robot Operating System-compatible capabilities for building robotic applications. The capabilities act like the building blocks of robot behavior. The release allows users to quickly and easily combine capabilities to achieve adaptive AI systems. The capabilities are ROS-compatible.
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<div style="text-align: center;"><span style="font-size: 36px;">π»</span></div></div>
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<h1><strong>Programming, Design & Data Science</strong></h1>
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<strong>Tech professionals have trained themselves to ignore ads. TLDR is the exception. (Sponsor)</strong>
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Your buyers scroll past product pitches on social all day and have learned to tune most of them out. In TLDR, your ad is written in the newsletter's voice and appears alongside the stories they came to read. <a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fadvertise.tldr.tech%2F%3Futm_source=tldr%26utm_medium=newsletter%26utm_campaign=secondary09232026%26sp=GTibM-7MsTbrinLIydz2whxV/2/010001a0cddba564-81c7d20e-858f-4242-b372-c728f6d81bcc-000000/ph0z3HnDDwynkFCcQoKju6bGyjrWfmrBYFEa6187cm0=452" rel="noopener noreferrer nofollow" target="_blank"><span>Learn more about sponsorship opportunities</span></a>.
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<a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fgithub.com%2Frun-llama%2Fliteparse%3Futm_source=tldrnewsletter/1/010001a0cddba564-81c7d20e-858f-4242-b372-c728f6d81bcc-000000/wFy-IDCzEY2eam0nxIPeClWGt5HPfkBobdzIbWnq3Fk=452">
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<strong>LiteParse (GitHub Repo)</strong>
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<span style="font-family: "Helvetica Neue", Helvetica, Arial, Verdana, sans-serif;">
LiteParse is a standalone OSS PDF parsing tool. Focused exclusively on fast and light parsing, it provides high-quality spatial text parsing with bounding boxes, without proprietary LLM features or cloud dependencies. It runs everything locally. A cloud-based version of the tool is available.
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<strong>Bug blindness (35 minute read)</strong>
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Some bugs give normal users such a bad experience that they tell their friends about it. Developers and advanced users can be blind to these bugs because they're used to performing the non-intuitive workarounds required to get around them. Humans have a high ability to ignore the negatives in things they like. Being open to criticism can help developers notice more flaws in their work.
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<div style="text-align: center;"><span style="font-size: 36px;">π</span></div></div>
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<div style="text-align: center;"><strong><h1>Miscellaneous</h1></strong></div>
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<a href="https://tracking.tldrnewsletter.com/CL0/https:%2F%2Fblog.staysaasy.com%2Fp%2Fdefensive-driving-for-your-career%3Futm_source=tldrnewsletter/1/010001a0cddba564-81c7d20e-858f-4242-b372-c728f6d81bcc-000000/0kcGmQqlDYPFLpP4Ovsylu41Hji8Pl9D3J0wLGrwh4s=452">
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<strong>Defensive Driving For Your Career (10 minute read)</strong>
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To have a positive career, you need to be appropriately recognized and rewarded for your work. Take public credit in a way that isn't obnoxious or wasteful. Don't let anyone lie about you, and beware of people who think you got lucky. Maintain leverage at all times - leverage mainly comes from your ability to walk a valuable asset (your labor) out the door.
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The cost of a given level of AI performance has fallen an average of around 47% per quarter over the past three years. AI spending can still remain high despite falling prices. Lower prices allow for more agents to be run. Also, AI's ability keeps rising, and the price of harder tasks is higher.
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AI will make GDP estimation difficult because it is hard to measure quality.
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<strong>Analyzing Jev, a new AI model (7 minute read)</strong>
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Jev is a close relative of LLMs, but it is actually more similar to the BERT series of models, which are used for classification, not generation.
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