Fugu Ultra vs Nano Banana 2 (Gemini 3.1 Flash Image)
Detailed technical comparison between Fugu Ultra (Sakana AI) and Nano Banana 2 (Gemini 3.1 Flash Image) (Google). Review live API token pricing, context window capabilities, time-to-first-token latency, and verified benchmark scores side-by-side.
Comparison Snapshot
Fugu Ultra
1,000,000 tokensTie
Equal CapabilityTie
Equal SpeedNano Banana 2 (Gemini 3.1 Flash Image)
$0.50 / MTokFugu Ultra
Fugu Ultra is the higher-performance model in Sakana AI's Fugu family. Rather than a single monolithic model, Fugu is a learned multi-agent orchestration system: a language model trained to route...
Nano Banana 2 (Gemini 3.1 Flash Image)
Gemini 3.1 Flash Image, a.k.a. "Nano Banana 2," is Google’s latest state of the art image generation and editing model, delivering Pro-level visual quality at Flash speed. It combines advanced...
Technical Specifications
🏆 = Superior Spec| Specification | Fugu Ultra | Nano Banana 2 (Gemini 3.1 Flash Image) |
|---|---|---|
| Provider | Sakana AI | |
| Context Window | 1,000,000 tokens🏆 | 131,072 tokens |
| Agent Suitability | N/A | N/A |
| Time to First Token (TTFT) | N/A | N/A |
| Deployment Model | managed api | managed api |
| Production Stability | beta | stable |
| API Available | Yes | Yes |
| Released Date | 2026-06-24 | 2026-06-18 |
API Pricing Comparison
Input Price per Million Tokens
Fugu Ultra
$5.00
Nano Banana 2 (Gemini 3.1 Flash Image)
$0.50
Output Price per Million Tokens
Fugu Ultra
$30.00
Nano Banana 2 (Gemini 3.1 Flash Image)
$3.00
💡 Cost Ratio: Nano Banana 2 (Gemini 3.1 Flash Image) is 10.0x cheaper per input token than Fugu Ultra.
Want to test both models live?
Run side-by-side prompt benchmarks in our dynamic multi-model Sandbox. Compare execution speeds, latency metrics, and compute actual costs in real-time.
Benchmark Performance Metrics
Standardized Scores (0–100%)Scores show verified raw accuracy percentages across standardized AI evaluation suites. Higher bars indicate superior performance in that domain.
Fugu Ultra Quirks & Gotchas
No developer gotchas reported.
Nano Banana 2 (Gemini 3.1 Flash Image) Quirks & Gotchas
No developer gotchas reported.
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