Fugu Ultra vs Aion-2.0 compared — price per token, context window, multimodality, openness and which to choose. Full 2026 breakdown.
Fugu Ultra — full profile › · Aion-2.0 — full profile ›
Prices & specs refreshed from live data · olud.ai
Open-model prices = cheapest provider via OpenRouter; official maker rates may be higher.
| Spec | Fugu Ultra | Aion-2.0 | Winner |
|---|---|---|---|
| Maker | Sakana AI | AionLabs | – |
| Type | Proprietary | Proprietary | – |
| Context window | 1M tokens | 131K tokens | SAFugu Ultra |
| Input price | $5/M | $0.8/M | AIAion-2.0 |
| Output price | $30/M | $1.6/M | AIAion-2.0 |
| Vision / multimodal | Yes | No | SAFugu Ultra |
| Tool / function calling | Yes | Yes | = Tie |
| Self-hostable | No (API only) | No (API only) | – |
| License | Proprietary | Proprietary | – |
Aion-2.0 is ~19× cheaper than Fugu Ultra on output tokens ($1.6 vs $30 per M tokens).
| Capability | Fugu Ultra | Aion-2.0 |
|---|---|---|
| Open weights (downloadable) | ✗ | ✗ |
| Self-hostable | ✗ | ✗ |
| Runs fully offline | ✗ | ✗ |
| Vision / multimodal | ✓ | ✗ |
| Tool / function calling | ✓ | ✓ |
| 1M+ context window | ✓ | ✗ |
| Criterion | Fugu Ultra | Aion-2.0 |
|---|---|---|
| Cost-efficiency | 3.0 | 4.5 |
| Context window | 5.0 | 3.5 |
| Openness | 1.5 | 1.5 |
| Self-hosting | 1.0 | 1.0 |
| Multimodality | 5.0 | 3.5 |
Scores come from live data — output price (cost), context length, open vs closed weights (openness & self-hosting) and vision/tool support (multimodality). Raw task quality isn't scored here; it depends on your benchmark — see the verdict.
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...
Aion-2.0 is a variant of DeepSeek V3.2 optimized for immersive roleplaying and storytelling. It is particularly strong at introducing tension, crises, and conflict into stories, making narratives feel more engaging....
Aion-2.0 is cheaper on output ($1.6/M vs $30/M).
Fugu Ultra offers the larger context window (1M tokens).
Choose Aion-2.0 for the lower output price ($1.6/M vs $30/M). Choose Fugu Ultra if you need the larger 1M context window.
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