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Fugu Ultra vs Grok 4.6
Fugu Ultra (Sakana) and Grok 4.6 (xAI) compared on benchmarks, pricing, context window, and use-case rankings.
- Grok 4.6 is cheaper on input tokens — $2.00 vs $5.00 per 1M.
- Fugu Ultra has a larger context window (1M vs 500K tokens).
| Attribute | Fugu Ultra | Grok 4.6 |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | — | 156 |
| Coding | — | 86 |
| Math | — | 87 |
| Reasoning & Knowledge | — | 69 |
| Agentic & Tools | — | 91 |
| Specifications | ||
| Developer | Sakana | xAI |
| Family | — | Grok |
| Released | Jun 24, 2026 | Aug 12, 2026 |
| Parameters | — | — |
| Availability | — | API access |
| Context window | 1M | 500K |
| Price — $/M input | $5.00 | $2.00 |
| Price — $/M output | $30.00 | $6.00 |
| Inputs | text, image | text, image, file |
| Outputs | text | text |
| Benchmarks | ||
| AIME 2024/2025 | — | 99% |
| APEX | — | 65% |
| ARC-AGI | — | 88% |
| ARC-AGI-2 | — | 67% |
| GPQA Diamond | — | 94% |
| Humanity's Last Exam | — | 43% |
| SciCode | — | 56% |
| SimpleBench | — | 76% |
| SimpleQA Verified | — | 49% |
| WebDev Arena | — | 1618 |
| WeirdML | — | 67% |
Use-case scores are 0–100 percentile composites across each area’s benchmarks, ranked against every model from the past year. Highlighted cells lead each row. Open a model for the full picture.
Frequently asked questions
Which is cheaper, Fugu Ultra or Grok 4.6?
Grok 4.6 is cheaper on input tokens at $2.00 per million, versus $5.00 (representative OpenRouter pricing).
Which has a larger context window, Fugu Ultra or Grok 4.6?
Fugu Ultra supports up to 1M tokens, compared with 500K for the other.
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Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.