SAFugu Ultra Paid vs 
GPT-4.1 Paid
Fugu Ultra vs GPT-4.1 compared — price per token, context window, multimodality, openness and which to choose. Full 2026 breakdown.
Fugu Ultra — full profile › · GPT-4.1 — full profile ›
Prices & specs refreshed from live data · olud.ai
Open-model prices = cheapest provider via OpenRouter; official maker rates may be higher.
$30 /M outputManaged API (no infra to run)
$8 /M outputManaged API (no infra to run)
Fugu Ultra vs GPT-4.1 specs
| Spec | Fugu Ultra | GPT-4.1 | Winner |
|---|---|---|---|
| Maker | Sakana AI | OpenAI | – |
| Type | Proprietary | Proprietary | – |
| Context window | 1M tokens | 1M tokens | |
| Input price | $5/M | $2/M | |
| Output price | $30/M | $8/M | |
| Vision / multimodal | Yes | Yes | = Tie |
| Tool / function calling | Yes | Yes | = Tie |
| Self-hostable | No (API only) | No (API only) | – |
| License | Proprietary | Proprietary | – |
Price gap & when to choose each
GPT-4.1 is ~3.8× cheaper than Fugu Ultra on output tokens ($8 vs $30 per M tokens).
- You want frontier performance through a managed API
- You value reliability & ecosystem
- You don't want to manage infrastructure
- You want frontier performance through a managed API
- You need the longer 1M context window
- You want the lower output price
- You value reliability & ecosystem
- You don't want to manage infrastructure
Feature comparison
| Capability | Fugu Ultra | GPT-4.1 |
|---|---|---|
| Open weights (downloadable) | ✗ | ✗ |
| Self-hostable | ✗ | ✗ |
| Runs fully offline | ✗ | ✗ |
| Vision / multimodal | ✓ | ✓ |
| Tool / function calling | ✓ | ✓ |
| 1M+ context window | ✓ | ✓ |
Benchmarks: Fugu Ultra vs GPT-4.1
Independent benchmark scores measured by Artificial Analysis. Higher is better (except latency).
Benchmark data by Artificial Analysis.
How Fugu Ultra and GPT-4.1 score
| Criterion | Fugu Ultra | GPT-4.1 |
|---|---|---|
| Cost-efficiency | 3.0 | 3.5 |
| Context window | 5.0 | 5.0 |
| Openness | 1.5 | 1.5 |
| Self-hosting | 1.0 | 1.0 |
| Multimodality | 5.0 | 5.0 |
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.
What each model is
Fugu Ultra Paid
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...
GPT-4.1 Paid
GPT-4.1 is a flagship large language model optimized for advanced instruction following, real-world software engineering, and long-context reasoning. It supports a 1 million token context window and outperforms GPT-4o and...
Other models in these families
These variants are tracked but not compared here — one page per family keeps the comparison readable.
Frequently asked questions
Fugu Ultra vs GPT-4.1 — which is cheaper?
GPT-4.1 is cheaper on output ($8/M vs $30/M).
Which has the larger context window?
GPT-4.1 offers the larger context window (1M tokens).
Fugu Ultra vs GPT-4.1 — which should I pick in 2026?
Choose GPT-4.1 for the lower output price ($8/M vs $30/M). It also gives you the larger 1M context window.
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