# Sakana Fugu-Ultra v1.1 vs Step 3.5 Flash

> Side-by-side benchmark comparison for Sakana Fugu-Ultra v1.1 and Step 3.5 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/sakana-fugu-ultra-v1-1-vs-step-3-5-flash
- Last updated: September 4, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Sakana Fugu-Ultra v1.1 and Step 3.5 Flash.

## Summary

- Sakana Fugu-Ultra v1.1 and Step 3.5 Flash do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | Sakana Fugu-Ultra v1.1 | Step 3.5 Flash |
|----------|----------|----------|
| Creator | Sakana AI | StepFun |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Non-Reasoning |
| Context | 1M | 256K |
| Independent public score (not head-to-head) | null | 53.09 |
| Benchmarks Covered | 0 | 0 |
| Pricing (input/output) | $5.00 / $30.00 | $0.10 / $0.30 |

## Category Breakdown

## FAQ

### Can I compare Sakana Fugu-Ultra v1.1 and Step 3.5 Flash on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [Sakana Fugu-Ultra v1.1 vs Sakana Fugu-Ultra](/compare/sakana-fugu-ultra-vs-sakana-fugu-ultra-v1-1)
- [Step 3.5 Flash vs Sakana Fugu-Ultra](/compare/sakana-fugu-ultra-vs-step-3-5-flash)
- [Sakana Fugu-Ultra v1.1 vs Sakana Fugu](/compare/sakana-fugu-vs-sakana-fugu-ultra-v1-1)
- [Step 3.5 Flash vs Sakana Fugu](/compare/sakana-fugu-vs-step-3-5-flash)

## Explore More

- [Sakana Fugu-Ultra v1.1 profile](/models/sakana-fugu-ultra-v1-1)
- [Step 3.5 Flash profile](/models/step-3-5-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)