$ diff fugu-max claude-fable-5-1
Fugu Max vs Claude Fable 5.1
Values come from Fugu Max and Claude Fable 5.1, 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
- closed
- $/M in
- $10
- $/M out
- $50
What actually differs
- Context window
- Identical — both accept 1M tokens, so context length is not a reason to pick either.
- Input price
- Fugu Max at $2/M against $10/M — 5.0× cheaper to feed.
- Output price
- Fugu Max at $6/M against $50/M — 8.3× cheaper to generate. Output dominates the bill on most agentic workloads, where the model writes far more than it reads.
- Recency
- Fugu Max shipped 10 days after Claude Fable 5.1 (2026-09-11 vs 2026-09-01).
Full spec
| Attribute | Fugu Max | Claude Fable 5.1 |
|---|---|---|
| Developer | Sakana AI | Anthropic |
| Released | 2026-09-11 | 2026-09-01 |
| Context window | 1,000,000 | 1M tokens |
| Pricing | $2/M input · $6/M output | $10/M input · $50/M output · cache reads $0.25/M |
| License | not recorded | proprietary (API-only; no weight release) |
| Availability | Sakana API (OpenAI-compatible), OpenRouter, NanoGPT, Kilo Gateway, LLM Gateway | Claude API as `claude-fable-5-1`; plan-tier access is disputed — see `## Conflicting Reports` |