Gemini 3.6 Flash vs Fugu Ultra 1.1

What I tested — same prompt, two models

I run the same fixed prompt set through every new model the day it drops — same string, one shot, single HTML file out — and I score the result 0–10 on whether it ran, how close it hit the brief, and how good it looked. Below is what came out when I gave the exact same prompts to Gemini 3.6 Flash and Fugu Ultra 1.1, side by side, on 24 shared tasks inside the Agent Operating System.

Both models were given identical prompts inside the Agent Operating System — no help, no iteration, no "best of N" tricks. I run each prompt once, save the HTML file the model produces, and score it 0–10 on whether it ran, how close it hit the brief, and how good it looked. The scoring is mine. The verdicts below are pulled from my source comparison guides at agentos.guide where I publish every score and the reasoning behind it.

Gemini 3.6 Flash · Benched via the native Gemini API on launch day. Game tasks use the skill-infused threejs-game-director prompt (same as the rest of the field) and are judged on a real mid-play frame by the same Opus vision judge.

Fugu Ultra 1.1 · Benched on GoldieBench via Sakana's Responses API (fugu-ultra-v1.1, xhigh reasoning). Game tasks use the skill-infused threejs-game-director prompt plus a controls+graphics fix loop with an anti-regression clamp, judged on a real mid-play frame by the same Opus judge as the field.

Where Gemini 3.6 Flash beat Fugu Ultra 1.1

The tasks where I gave Gemini 3.6 Flash a higher 0–10 score on the same prompt — with the actual commentary from my source guides.

Where Fugu Ultra 1.1 beat Gemini 3.6 Flash

The tasks where I gave Fugu Ultra 1.1 a higher 0–10 score on the same prompt — with the actual commentary from my source guides.

Strengths & weaknesses I logged

Pricing & context — the spec sheet

The verdict — which should you pick?

Across 23 scored shared tasks, Gemini 3.6 Flash averaged 7.31/10, beating Fugu Ultra 1.1's 6.94/10 by 0.37 points. Pick Gemini 3.6 Flash when the build has to ship on the first prompt and you can afford the trade-offs in the comparison below.

If you only run one of these inside your stack, the head-to-head average above is the call. If you can run both, my honest play is to wire Gemini 3.6 Flash and Fugu Ultra 1.1 both into the Agent Operating System and dispatch each from the kanban by task type — high-volume agentic work where token cost dominates → Gemini 3.6 Flash, hard, high-stakes coding and reasoning where answer quality beats latency → Fugu Ultra 1.1. That's the same setup I run for the 4,000+ founders inside the AI Profit Boardroom.

FAQ — Gemini 3.6 Flash vs Fugu Ultra 1.1

Which is better, Gemini 3.6 Flash or Fugu Ultra 1.1?

On Goldie Bench, Gemini 3.6 Flash averages 7.31/10 across the shared tasks, with 1 gold, 2 silver, 2 bronze overall. Fugu Ultra 1.1 averages 6.94/10, with 0 gold, 1 silver, 2 bronze. It's a curated tie on the head-to-head.

How much does Gemini 3.6 Flash cost vs Fugu Ultra 1.1?

Gemini 3.6 Flash: Launched 2026-07-21 alongside Gemini 3.5 Flash-Lite and 3.5 Flash Cyber. Google's pitch: higher intelligence than its predecessors on coding/ML/knowledge tasks while using 17% fewer output tokens, at a new lower price ($1.50 per million input tokens). Benched here via the native Gemini API on launch day. Fugu Ultra 1.1: Sakana's Fugu Ultra v1.1 — a multi-agent system served as a model: an orchestrator routes each request across one to three expert agents and synthesises the answer. Reported (v1.0): SWE-Bench Pro 73.7, LiveCodeBench 93.2, GPQA Diamond 95.5. NOTE: Sakana geo-blocks the EU/EEA/UK/Switzerland pending GDPR compliance — benched from an allowed region.

What's the context window for Gemini 3.6 Flash vs Fugu Ultra 1.1?

Gemini 3.6 Flash has a 1,000,000-token context window context window. Fugu Ultra 1.1 has a 1,000,000-token context window context window.

When should I pick Gemini 3.6 Flash over Fugu Ultra 1.1?

Pick Gemini 3.6 Flash for: High-volume agentic work where token cost dominates; Fast prototype builds you iterate on rather than one-shot masterpieces; Routing the everyday 90% while a flagship handles the hard 10%. The trade-off is the weaknesses we logged on the bench: Benched on launch day — partial run until the full 50-task batch completes; Flash tier, not a flagship — up against Pro/flagship-class models on this board.

When should I pick Fugu Ultra 1.1 over Gemini 3.6 Flash?

Pick Fugu Ultra 1.1 for: Hard, high-stakes coding and reasoning where answer quality beats latency; Agentic workflows in Codex / Claude Code via the drop-in provider config; One-shot builds you want a panel of experts on, not a single model. The trade-off is the weaknesses we logged on the bench: Benched as a partial run until the full 50-task batch completes; Region-locked: unavailable across the EU/EEA/UK/CH — access depends on where you are.

How does Goldie Bench score Gemini 3.6 Flash vs Fugu Ultra 1.1?

Every demo on this page was built by Julian Goldie inside the Agent Operating System — same fixed prompt for both models, one shot, single HTML file out. Each result gets a 0–10 score on whether it ran, how close it hit the brief, and how good it looked. The highest score on each task gets gold; second gets silver; third gets bronze. See methodology for full provenance.

Related comparisons

Other head-to-heads using the same scoring system:

Full model pages: Gemini 3.6 Flash · Fugu Ultra 1.1 · back to the leaderboard