Model comparison
GPT-5.4 Pro vs Sakana Fugu-Ultra
Head-to-head evidence from 1 shared benchmark result across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: GPT-5.4 Pro #44 (Estimated); Sakana Fugu-Ultra unranked (Not scored). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. GPT-5.4 Pro and Sakana Fugu-Ultra share 1 comparable benchmark result. 4 of 8 categories are comparable. 11 results are unique to GPT-5.4 Pro; 10 to Sakana Fugu-Ultra.
Updated July 23, 2026- Shared results
- 1
- GPT-5.4 Pro only
- 11
- Sakana Fugu-Ultra only
- 10
- Comparable categories
- 4 / 8
Treat this as a split decision. GPT-5.4 Pro makes more sense if multimodal & grounded is the priority or you need the larger 1.05M context window; Sakana Fugu-Ultra is the better fit if knowledge is the priority.
Confidence note. This is a partial-evidence comparison with 1 shared benchmark result across 1 evidence category; 4 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
GPT-5.4 Pro and Sakana Fugu-Ultra finish on the same BenchAlign overall score, so this is less about a single winner and more about where the edge shows up. The BenchAlign headline says tie; the benchmark table is where the real choice happens.
GPT-5.4 Pro gives you the larger context window at 1.05M, compared with 1M for Sakana Fugu-Ultra.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | GPT-5.4 Pro | Δ | Sakana Fugu-Ultra |
|---|---|---|---|
| Knowledge | GPT-5.4 Pro58.7 | Margin→ 36.8 | Sakana Fugu-Ultra95.5 |
| Reasoning | GPT-5.4 Pro83.3 | Margin→ 10.3 | Sakana Fugu-Ultra93.6 |
| Multimodal | GPT-5.4 Pro94.0 | Margin← 7.4 | Sakana Fugu-Ultra86.6 |
| Agentic | GPT-5.4 Pro89.3 | Margin← 7.2 | Sakana Fugu-Ultra82.1 |
| Coding | GPT-5.4 ProNot measured | MarginNo overlap | Sakana Fugu-Ultra64.5 |
| Math | GPT-5.4 Pro46.9 | MarginNo overlap | Sakana Fugu-UltraNot measured |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | GPT-5.4 Pro | Sakana Fugu-Ultra | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | GPT-5.4 Pro$30 input / $180 output | Sakana Fugu-UltraNot available | A complete price comparison is not available. |
| Generation speedtokens per second | GPT-5.4 Pro74 tok/s | Sakana Fugu-UltraNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | GPT-5.4 Pro151.79 s | Sakana Fugu-UltraNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | GPT-5.4 Pro1.05M | Sakana Fugu-Ultra1M | GPT-5.4 Pro lists the larger context window. |
Benchmark Deep Dive
AgenticGPT-5.4 Pro wins2 benchmarks
Coding5 benchmarks
ReasoningSakana Fugu-Ultra wins3 benchmarks
KnowledgeSakana Fugu-Ultra wins6 benchmarks
Math4 benchmarks
Frequently Asked Questions (5)
Which is better, GPT-5.4 Pro or Sakana Fugu-Ultra?
GPT-5.4 Pro and Sakana Fugu-Ultra are tied on the BenchAlign overall score, so the right pick depends on which category matters most for your use case.
Which is better for knowledge tasks, GPT-5.4 Pro or Sakana Fugu-Ultra?
Sakana Fugu-Ultra has the edge for knowledge tasks in this comparison, averaging 95.5 versus 58.7. Inside this category, HLE w/o tools is the benchmark that creates the most daylight between them.
Which is better for reasoning, GPT-5.4 Pro or Sakana Fugu-Ultra?
Sakana Fugu-Ultra has the edge for reasoning in this comparison, averaging 93.6 versus 83.3. GPT-5.4 Pro stays close enough that the answer can still flip depending on your workload.
Which is better for agentic tasks, GPT-5.4 Pro or Sakana Fugu-Ultra?
GPT-5.4 Pro has the edge for agentic tasks in this comparison, averaging 89.3 versus 82.1. Sakana Fugu-Ultra stays close enough that the answer can still flip depending on your workload.
Which is better for multimodal and grounded tasks, GPT-5.4 Pro or Sakana Fugu-Ultra?
GPT-5.4 Pro has the edge for multimodal and grounded tasks in this comparison, averaging 94 versus 86.6. Sakana Fugu-Ultra stays close enough that the answer can still flip depending on your workload.
Related Comparisons
Explore More
Choose a model with this week’s evidence
Join 2,000+ readers for ranking moves, pricing changes, and the claims that still need proof.
One email each week. Unsubscribe anytime.