Free · No signup · No paywall

AI Tools for Builders

Working tools for the decisions AI builders make every week — what a model costs, which one to pick, whether to build or buy, and how far your rate limits stretch. Fact-bearing tools share one dataset, verified against official provider sources.

CompareAI Model Comparison TrackerEvery frontier model in one sortable table — context window, price per 1M tokens, SWE-bench standing, and release date. GPT, Claude, Gemini, Grok, DeepSeek.Verified July 14, 2026Open →CountToken Counter & Prompt Cost EstimatorPaste any text for an exact token count with OpenAI's o200k encoding, then see what sending it costs on every major model. Runs entirely in your browser.In-browser · nothing uploadedOpen →BudgetLLM API Cost CalculatorEnter tokens per request and daily volume to project monthly API spend across models — every price editable to match your provider's current rates.Verified July 14, 2026Open →DecideAI Build vs Buy WorksheetEight weighted questions — differentiation, data advantage, compliance, year-two ownership — that turn the build-vs-buy call into a recommendation you can defend.Shareable result · transparent scoringOpen →ScaleLLM API Rate Limits ReferenceHow rate limiting works on all five major providers: documented tier tables, 429 handling, headers, and the levers that raise your throughput ceiling.Verified July 14, 2026Open →TrackAI TimelineA running, month-by-month timeline of major AI events — model launches, funding rounds, policy moves — each linked to full analysis. Extends every weekday.Updated dailyOpen →

Build with AI? Get the daily rundown.

Original AI briefings for founders, PMs, and builders — free, every morning.

Subscribe →