BROMANDERLABS
Free, no-signup tools we build for the AI engineering community. Real math, total privacy, zero signups.
Each tool ships with our reasoning open and our assumptions documented. If we say your rig runs Llama 3 at 42 tok/sec, you can see exactly why.
Local AI Scanner
Can your rig run that model?
Math-based VRAM, KV cache, and tokens/sec estimates for 140+ GPUs and 50+ open-weight LLMs — Llama 4, Gemma 4, Qwen3, DeepSeek R1 included. The honest answer to "Can I Run It?".
Prompt Cost Estimator
Stop guessing your API bill.
Per-call, daily, monthly, and yearly cost across 25+ models from Anthropic, OpenAI, Google, DeepSeek, Mistral, xAI, Cohere, and hosted Llama. Cache + batch math included.
Context Window Visualizer
See what fits in 128K.
Paste your codebase, docs, or chat history. Live token count + a fit-or-truncate verdict across 21 models from 32K all the way to Llama 4 Scout's 10M.
Inference Latency Map
Who's actually fast?
TTFT + throughput leaderboard across 27 provider+model combos — from Cerebras' 2,600 tok/s wafer-scale to OpenAI's reasoning-mode marathons. Sources cited, reasoning models flagged.
Fine-Tuning VRAM Calculator
Can your rig train it?
Peak VRAM for full, LoRA, and QLoRA across 50+ models — weights, gradients, optimizer state, and activations broken out. The honest answer to "Can I fine-tune this?".
Self-Host vs API Break-Even
Build or buy?
Pit pay-per-token APIs against renting and owning GPUs. Find the exact monthly volume where a 4090 pays for itself versus your favorite frontier model.
Quantization Explorer
Is Q4 good enough?
Size versus quality across 11 GGUF quants, with llama.cpp perplexity data and the best quant that still fits your card. Stop guessing at Q4_K_M.
Energy & Carbon Calculator
What does your AI burn?
Tokens to kilowatt-hours to CO₂, across 20 GPUs and 9 grid regions. See your inference footprint in miles driven, phone charges, and trees.
Math, not marketing
Every number on these tools traces back to a published formula or a benchmark we can defend. No hand-waving.
Your data, your machine
Calculators run entirely in your browser. Your specs, prompts, and inputs are never sent to us or logged. Privacy is the default.
Always free
We build software, we don't sell your data. Every tool here is funded entirely by our own apps.
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