$ diff fugu-max hy4-preview
Fugu Max vs Hy4 preview
Values come from Fugu Max and Hy4 preview, where each is cited to its source. This page states no benchmark result and ranks neither model — it puts two published specifications next to each other. Where a lab has not published a figure, the row says so rather than guessing.
Sakana AIFugu Max
- context
- 1M
- weights
- —
- $/M in
- $2
- $/M out
- $6
- context
- 1M
- weights
- open
- $/M in
- $0.834
- $/M out
- $2.501
What actually differs
- Context window
- Identical — both accept 1M tokens, so context length is not a reason to pick either.
- Input price
- Hy4 preview at $0.834/M against $2/M — 2.4× cheaper to feed.
- Output price
- Hy4 preview at $2.501/M against $6/M — 2.4× cheaper to generate. Output dominates the bill on most agentic workloads, where the model writes far more than it reads.
- Recency
- Fugu Max shipped 14 days after Hy4 preview (2026-09-11 vs 2026-08-28).
Full spec
| Attribute | Fugu Max | Hy4 preview |
|---|---|---|
| Developer | Sakana AI | Tencent |
| Released | 2026-09-11 | 2026-08-28 |
| Context window | 1,000,000 | over 1,000,000 |
| Pricing | $2/M input · $6/M output | $0.834/M input · $2.501/M output |
| License | not recorded | Apache-2.0 |
| Availability | Sakana API (OpenAI-compatible), OpenRouter, NanoGPT, Kilo Gateway, LLM Gateway | Hugging Face (BF16 + FP8), ModelScope, GitCode, CNB, Tencent Cloud TokenHub, OpenRouter, WorkBuddy, CodeBuddy, Yuanbao, ima |