Supesonic Developer Library https://supesonic.com/guides Practical articles for integrations, API budgets and reliable workflows. <![CDATA[AI API cost calculator: plan tokens, requests and credit]]> https://supesonic.com/guides/llm-api-cost-calculator https://supesonic.com/guides/llm-api-cost-calculator Tue, 08 Sep 2026 00:00:00 +0000 <![CDATA[Move your app to a compatible AI API: a migration checklist]]> https://supesonic.com/guides/openai-compatible-api-migration-checklist https://supesonic.com/guides/openai-compatible-api-migration-checklist Tue, 08 Sep 2026 00:00:00 +0000 <![CDATA[API key not working? Diagnose model access and routing]]> https://supesonic.com/guides/api-key-model-access-troubleshooting https://supesonic.com/guides/api-key-model-access-troubleshooting Tue, 08 Sep 2026 00:00:00 +0000 <![CDATA[Claude subscription or API key: what the terms actually say]]> https://supesonic.com/guides/claude-subscription-vs-api-key-for-third-party-tools https://supesonic.com/guides/claude-subscription-vs-api-key-for-third-party-tools Sat, 05 Sep 2026 00:00:00 +0000 <![CDATA[Is a cheap Claude API legitimate? Six checks before you send money]]> https://supesonic.com/guides/is-a-cheap-claude-api-legit https://supesonic.com/guides/is-a-cheap-claude-api-legit Thu, 03 Sep 2026 00:00:00 +0000 <![CDATA[The ANTHROPIC_BASE_URL 404, and the one path segment behind it]]> https://supesonic.com/guides/anthropic-base-url-404 https://supesonic.com/guides/anthropic-base-url-404 Tue, 01 Sep 2026 00:00:00 +0000 <![CDATA[When your uptime probe becomes the outage]]> https://supesonic.com/guides/when-your-probe-becomes-the-outage https://supesonic.com/guides/when-your-probe-becomes-the-outage Mon, 31 Aug 2026 00:00:00 +0000 <![CDATA[What uptime means when your client retries]]> https://supesonic.com/guides/uptime-when-your-client-retries https://supesonic.com/guides/uptime-when-your-client-retries Mon, 31 Aug 2026 00:00:00 +0000 <![CDATA[A p95 from six samples is just your slowest call]]> https://supesonic.com/guides/a-p95-needs-twenty-samples https://supesonic.com/guides/a-p95-needs-twenty-samples Mon, 31 Aug 2026 00:00:00 +0000 <![CDATA[AI API relays, explained: how they work and how to audit one]]> https://supesonic.com/guides/ai-api-relays-explained https://supesonic.com/guides/ai-api-relays-explained Sun, 30 Aug 2026 00:00:00 +0000 <![CDATA[Canary-testing an AI API relay: a method you can run yourself]]> https://supesonic.com/guides/canary-testing-an-ai-api-relay https://supesonic.com/guides/canary-testing-an-ai-api-relay Sun, 30 Aug 2026 00:00:00 +0000 <![CDATA[Model authenticity: what happens when one model name has four routes]]> https://supesonic.com/guides/model-authenticity-and-routing https://supesonic.com/guides/model-authenticity-and-routing Sun, 30 Aug 2026 00:00:00 +0000 <![CDATA[We audited our own list prices against the providers, and two were wrong]]> https://supesonic.com/guides/we-audited-our-own-list-prices https://supesonic.com/guides/we-audited-our-own-list-prices Sun, 30 Aug 2026 00:00:00 +0000 <![CDATA[Per 1K or per 1M: the 1000x error waiting in every price comparison]]> https://supesonic.com/guides/per-1k-vs-per-1m-the-1000x-error https://supesonic.com/guides/per-1k-vs-per-1m-the-1000x-error Sun, 30 Aug 2026 00:00:00 +0000 <![CDATA[Reading a provider’s list price correctly: the conditions nobody quotes]]> https://supesonic.com/guides/reading-a-providers-list-price https://supesonic.com/guides/reading-a-providers-list-price Sun, 30 Aug 2026 00:00:00 +0000 <![CDATA[Prepaid credit or a monthly bill: which billing model fits your workload]]> https://supesonic.com/guides/prepaid-vs-postpaid-llm-credit https://supesonic.com/guides/prepaid-vs-postpaid-llm-credit Sun, 30 Aug 2026 00:00:00 +0000 <![CDATA[What “OpenAI-compatible” actually has to mean]]> https://supesonic.com/guides/what-openai-compatible-actually-means https://supesonic.com/guides/what-openai-compatible-actually-means Sun, 30 Aug 2026 00:00:00 +0000