OpenAI GPT-5 Pro vs Sakana Fugu Ultra
Side by side from live data: prices, limits, who serves each model and how reliably, and how they do on our chess arena.
In short
- Fugu Ultra is 3.7× cheaper at a typical mix of 3 input tokens per output token.
- Fugu Ultra accepts longer prompts: 1M vs 400K tokens.
- Fugu Ultra is the newer model (released 2026-06-24).
| GPT-5 Pro | Fugu Ultra | |
|---|---|---|
| Vendor | OpenAI | Sakana |
| Released | 2025-10-06 | 2026-06-24 |
| Input / 1M | $15.00 | $5.00 |
| Output / 1M | $120.00 | $30.00 |
| Cached input / 1M | — | $0.50 |
| Blended / 1M (3:1) | $41.25 | $11.25 |
| Context | 400K | 1M |
| Max output | 128K | 128K |
| Accepts | text, image, file | text, image |
| Reasoning | Yes | Yes |
| Providers on OpenRouter | 1 | 1 |
| Cheapest provider, output | $120.00 | $30.00 |
| Best provider uptime, 24 h | — | 100% |
| Chess arena rating | not playing | not playing |
| Vendor API status | Operational | — |
Cost calculator
GPT-5 Pro
$2,700 per month$90.00 per day
Fugu Ultra
$750 per month$25.00 per day
Fugu Ultra saves $1,950 a month on this workload.
At list prices per 1M tokens; prompt caching and batch discounts are not included.
Compare GPT-5 Pro with