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Notes from building a scratchpad that sends one prompt to several LLMs and diffs the answers.

GPT vs Claude vs Gemini: the same 3 prompts, real answers

I ran three prompts through three models and pasted the actual output. Latency, tokens, and cost included.

2026-09-11
Why do LLMs give different answers to the same question?

Sampling, training cutoffs, post-training, system prompts, reasoning budgets, and routing. Six reasons, no magic.

2026-09-11
How to compare LLM outputs side by side (free, no signup)

What to look at, how word diffs help, how to pick a base model, and the mistakes I keep making.

2026-09-11