Brand guidelines · v1.0 · 2026
How TunnelGPT looks, moves and speaks. Use these rules for anything that carries our name — product, marketing, partner materials and press.
Every model is a different path through the same problem. TunnelGPT is where those paths converge — a single point of light where the best answer comes out the other side.
Every model, one place. We bring the frontier together so nobody has to choose a tab before they choose a thought.
We remove noise, not options. Power is always one click away and never in the way.
Fast, fluid, forward. Everything we make should feel like it’s already moving.
Four rings — the same circle seen at four depths — converge on a single point of Volt light. The rings are every model; the light is your answer. In motion, the rings fly toward the viewer in a continuous four-second loop, so the brand always feels like it’s travelling forward.
Dark first. Ink is the tunnel; Violet and Cyan are its walls; Volt is the light at the end — and like any light at the end of a tunnel, it’s small and precious. Click a swatch to copy it.
Ink 60 · Graphite 20 · Violet 8 · Cyan 6 · Paper 4 · Volt 2
Aa
Headlines, numbers and the wordmark. Weights 600–900, tracking −3% to −5%. Never for body copy.
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Body copy, interface and long reads. Weights 400–700 with default tracking.
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Labels, code, data and model names in tables. Uppercase labels get +14% tracking.
Every model.
One place.
Switch mid-thought.
Memory that travels
Hand a thread from one model to another with the full context intact.
Early access · v1.0
TunnelGPT is always moving forward. Motion should feel like travelling through depth — never bouncing, never wobbling.
Things arrive from depth and accelerate toward you. No springs, no overshoot.
Content arrives the way AI answers do — word by word, line by line.
Loops travel in one direction. Nothing rewinds, nothing shakes.
cubic-bezier(.2, .8, .2, 1)UI, reveals, hovers · 300–900 mscubic-bezier(.55, 0, 1, .45)Depth loops, the mark · 4 slinearMarquees and streams onlyShort sentences, concrete words. If a ten-year-old can’t follow it, rewrite it.
We know the models and say what they do. No hype, no hedging.
Human and a little playful. Never cute, never snarky.
TunnelGPT — one word, capital T, capital GPT. The lowercase “tunnel” lives only inside the wordmark.
Tunnel GPTTunnelGptTunnel-GPTTGPT
:root {
--ink: #07070B;
--graphite: #15151F;
--violet: #7B61FF;
--cyan: #2EE6D6;
--volt: #D4FF3A;
--paper: #F3F3F7;
--ember: #FF5C3A;
--grad-tunnel: linear-gradient(110deg, #7B61FF, #2EE6D6);
--ease-glide: cubic-bezier(.2, .8, .2, 1);
--ease-warp: cubic-bezier(.55, 0, 1, .45);
--font-display: 'Unbounded', sans-serif;
--font-text: 'Inter', sans-serif;
--font-mono: 'JetBrains Mono', monospace;
}