Model comparison
Composer 2 vs Sakana Fugu-Ultra
Head-to-head evidence from 2 shared benchmark results across 2 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Evidence parity. Composer 2 and Sakana Fugu-Ultra share 2 comparable benchmark results. 2 of 8 categories are comparable. 3 results are unique to Composer 2; 9 to Sakana Fugu-Ultra.
Updated July 23, 2026- Shared results
- 2
- Composer 2 only
- 3
- Sakana Fugu-Ultra only
- 9
- Comparable categories
- 2 / 8
Treat this as a split decision. Composer 2 makes more sense if its workflow fits your team better; Sakana Fugu-Ultra is the better fit if agentic is the priority or you need the larger 1M context window.
Confidence note. This is a partial-evidence comparison with 2 shared benchmark results across 2 evidence categories; 2 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Composer 2 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.
Sakana Fugu-Ultra gives you the larger context window at 1M, compared with 200K for Composer 2.
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 | Composer 2 | Δ | Sakana Fugu-Ultra |
|---|---|---|---|
| Agentic | Composer 261.7 | Margin→ 20.4 | Sakana Fugu-Ultra82.1 |
| Coding | Composer 258.0 | Margin→ 6.5 | Sakana Fugu-Ultra64.5 |
| Reasoning | Composer 2Not measured | MarginNo overlap | Sakana Fugu-Ultra93.6 |
| Knowledge | Composer 2Not measured | MarginNo overlap | Sakana Fugu-Ultra95.5 |
| Multimodal | Composer 2Not measured | MarginNo overlap | Sakana Fugu-Ultra86.6 |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
Terminal-Bench 2.0
AgenticA 61.7%B 82.1%Winner: Sakana Fugu-UltraΔ 20.4Terminal-Bench 2.0: Composer 2 scored 61.7%; Sakana Fugu-Ultra scored 82.1%. Sakana Fugu-Ultra wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Composer 2 | Sakana Fugu-Ultra | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Composer 2$0.5 input / $2.5 output | Sakana Fugu-UltraNot available | A complete price comparison is not available. |
| Generation speedtokens per second | Composer 2Not available | Sakana Fugu-UltraNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Composer 2Not available | Sakana Fugu-UltraNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Composer 2200K | Sakana Fugu-Ultra1M | Sakana Fugu-Ultra lists the larger context window. |
Benchmark Deep Dive
AgenticSakana Fugu-Ultra wins1 benchmarks
| Benchmark | Composer 2 | Sakana Fugu-Ultra | Result |
|---|---|---|---|
| Terminal-Bench 2.0Source | 61.7% | 82.1% | Sakana Fugu-Ultra leads |
CodingSakana Fugu-Ultra wins8 benchmarks
| Benchmark | Composer 2 | Sakana Fugu-Ultra | Result |
|---|---|---|---|
| SWE MultilingualSource | 73.7% | — | Not comparable |
| SWE-RebenchSource | 58% | — | Not comparable |
| React Native EvalsSource | 96.1% | — | Not comparable |
| Terminal-Bench 2.0Source | 61.7% | 82.1% | Sakana Fugu-Ultra leads |
| SWE-bench ProSource | — | 73.7% | Not comparable |
| LiveCodeBench v6Source | — | 93.2% | Not comparable |
| LiveCodeBench ProSource | — | 90.8% | Not comparable |
| SciCodeSource | — | 58.7% | Not comparable |
Reasoning1 benchmarks
| Benchmark | Composer 2 | Sakana Fugu-Ultra | Result |
|---|---|---|---|
| MRCRv2Source | — | 93.6% | Not comparable |
Knowledge3 benchmarks
Multimodal1 benchmarks
| Benchmark | Composer 2 | Sakana Fugu-Ultra | Result |
|---|---|---|---|
| CharXivSource | — | 86.6% | Not comparable |
Frequently Asked Questions (3)
Which is better, Composer 2 or Sakana Fugu-Ultra?
Composer 2 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 coding, Composer 2 or Sakana Fugu-Ultra?
Sakana Fugu-Ultra has the edge for coding in this comparison, averaging 64.5 versus 58. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
Which is better for agentic tasks, Composer 2 or Sakana Fugu-Ultra?
Sakana Fugu-Ultra has the edge for agentic tasks in this comparison, averaging 82.1 versus 61.7. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
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