TeximosA publication about technology: what just shipped, what it actually does and what it costs when it breaks.https://teximos.com/A transaction protects the write, not your closurehttps://teximos.com/blog/a-transaction-protects-the-write-not-your-closure/https://teximos.com/blog/a-transaction-protects-the-write-not-your-closure/Twelve requests arrived at once against a free allowance that was already spent. None of them should have been served. Nine were, and the counter they were checked against was correct the entire time.Wed, 05 Aug 2026 12:00:00 GMTConcurrencyThe stream died and the log said 200https://teximos.com/blog/the-stream-died-and-the-log-said-200/https://teximos.com/blog/the-stream-died-and-the-log-said-200/For six sessions the complaint was that one model could not answer questions about email. Every observation behind that was true. The conclusion was wrong in every particular.Wed, 05 Aug 2026 11:00:00 GMTStreamingA model that never worked, because a guard was keyed on spellinghttps://teximos.com/blog/a-model-that-never-worked-because-a-guard-was-keyed-on-spelling/https://teximos.com/blog/a-model-that-never-worked-because-a-guard-was-keyed-on-spelling/The most expensive model in the catalogue answered every request with a 200, six hundred milliseconds and zero characters. It had done that since the day it was listed.Wed, 05 Aug 2026 10:00:00 GMTModel routingA customer paid, and the webhook had nowhere to put ithttps://teximos.com/blog/a-customer-paid-and-the-webhook-had-nowhere-to-put-it/https://teximos.com/blog/a-customer-paid-and-the-webhook-had-nowhere-to-put-it/Stripe did everything right. The subscription was active and the money had moved. The account it belonged to had no record that any of it happened.Wed, 05 Aug 2026 09:00:00 GMTPaymentsA missing price billed every image at 27xhttps://teximos.com/blog/a-missing-price-billed-every-image-at-27x/https://teximos.com/blog/a-missing-price-billed-every-image-at-27x/The cheapest model we served was absent from the pricing table, so it fell through to the fallback weight. Every image request in production landed on it.Tue, 04 Aug 2026 00:00:00 GMTMetering and billingThe baseline was priced with the wrong modelhttps://teximos.com/blog/the-baseline-was-priced-with-the-wrong-model/https://teximos.com/blog/the-baseline-was-priced-with-the-wrong-model/Flash was filed with Flash-Lite's rates. Nothing errored, because the number was plausible and it was the number every other price divided by.Tue, 04 Aug 2026 00:00:00 GMTMetering and billing