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...
Model details →Sakana: Fugu Ultra vs Anthropic: Claude Fable Latest
Sakana: Fugu Ultra wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
This model always redirects to the latest model in the Claude Fable family.
Model details →Side-by-side comparison
| Capability | Sakana: Fugu Ultra | Anthropic: Claude Fable Latest | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1M | 1M | Tie |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $5.00 | $10.00 | 🏆 Sakana: Fugu Ultra |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $30.00 | $50.00 | 🏆 Sakana: Fugu Ultra |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is Sakana: Fugu Ultra better than Anthropic: Claude Fable Latest?
Sakana: Fugu Ultra wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between Sakana: Fugu Ultra and Anthropic: Claude Fable Latest?
Input: $5.00 vs $10.00 per 1M tokens. Output: $30.00 vs $50.00 per 1M tokens.
What context windows do Sakana: Fugu Ultra and Anthropic: Claude Fable Latest support?
Sakana: Fugu Ultra supports up to 1M tokens. Anthropic: Claude Fable Latest supports up to 1M tokens.
Do both Sakana: Fugu Ultra and Anthropic: Claude Fable Latest support tool calling?
Sakana: Fugu Ultra: yes. Anthropic: Claude Fable Latest: yes.
Compare Sakana: Fugu Ultra with other models
vs Anthropic Claude Haiku Latestvs Anthropic Claude Sonnet Latestvs Anthropic: Claude Fable Latestvs Anthropic: Claude Opus Latest