Sakana: Fugu Ultra v2 alternatives
Ranked by capability overlap, similar context window, and similar price tier. Cross-vendor options are weighted higher than same-provider alternatives.
See also: Sakana: Fugu Ultra v2 model details · Sakana provider page
Top 15 alternatives
| # | Model | Provider | Why | Context | Input price / 1M | Compare |
|---|---|---|---|---|---|---|
| 1 | Anthropic: Claude Fable 5 | Anthropic | shares reasoning, tool-use, structured-output, vision · similar price tier | 1M Ultra context (1M+) | $10.00 Premium | vs → |
| 2 | Anthropic: Claude Fable 5 (batch) | Anthropic | shares reasoning, tool-use, structured-output, vision · similar price tier | 1M Ultra context (1M+) | $5.00 Standard | vs → |
| 3 | Anthropic: Claude Fable 5.1 | Anthropic | shares reasoning, tool-use, structured-output, vision · similar price tier | 1M Ultra context (1M+) | $10.00 Premium | vs → |
| 4 | Anthropic: Claude Fable 5.1 (batch) | Anthropic | shares reasoning, tool-use, structured-output, vision · similar price tier | 1M Ultra context (1M+) | $5.00 Standard | vs → |
| 5 | Anthropic: Claude Opus 4.6 | Anthropic | shares reasoning, tool-use, structured-output, vision · similar price tier | 1M Ultra context (1M+) | $5.00 Standard | vs → |
| 6 | Anthropic: Claude Opus 4.7 | Anthropic | shares reasoning, tool-use, structured-output, vision · similar price tier | 1M Ultra context (1M+) | $5.00 Standard | vs → |
| 7 | Anthropic: Claude Opus 4.8 | Anthropic | shares reasoning, tool-use, structured-output, vision · similar price tier | 1M Ultra context (1M+) | $5.00 Standard | vs → |
| 8 | Anthropic: Claude Opus 4.8 (Fast) | Anthropic | shares reasoning, tool-use, structured-output, vision · similar price tier | 1M Ultra context (1M+) | $10.00 Premium | vs → |
| 9 | Claude Opus 5 | Anthropic | shares reasoning, tool-use, structured-output, vision · similar price tier | 1M Ultra context (1M+) | $5.00 Standard | vs → |
| 10 | Claude Opus 5 (Fast) | Anthropic | shares reasoning, tool-use, structured-output, vision · similar price tier | 1M Ultra context (1M+) | $10.00 Premium | vs → |
| 11 | OpenAI: GPT-5.4 Pro (batch) | OpenAI | shares reasoning, tool-use, structured-output, vision · similar price tier | 1.1M Ultra context (1M+) | $15.00 Premium | vs → |
| 12 | OpenAI: GPT-5.5 | OpenAI | shares reasoning, tool-use, structured-output, vision · similar price tier | 1.1M Ultra context (1M+) | $5.00 Standard | vs → |
| 13 | OpenAI: GPT-5.5 Pro (batch) | OpenAI | shares reasoning, tool-use, structured-output, vision · similar price tier | 1.1M Ultra context (1M+) | $15.00 Premium | vs → |
| 14 | OpenAI: GPT-6 Astra | OpenAI | shares reasoning, tool-use, structured-output, vision · similar price tier | 1.1M Ultra context (1M+) | $10.00 Premium | vs → |
| 15 | OpenAI: GPT-6 Astra (batch) | OpenAI | shares reasoning, tool-use, structured-output, vision · similar price tier | 1.1M Ultra context (1M+) | $5.00 Standard | vs → |