Model profile
Sakana Fugu-Ultra
Evidence coverage
11 of 323 tracked benchmarks are published. 11 are verified and 0 provisional. 5 of 8 categories are measured.
- Published / tracked
- 11 / 323
- Verified
- 11
- Provisional
- 0
- Categories with evidence
- 5 / 8
Evidence by category
- Agentic1 benchmarkVerified
- Coding5 benchmarksVerified
- Reasoning1 benchmarkVerified
- Knowledge3 benchmarksVerified
- Math0 benchmarksNot measured
- Multilingual0 benchmarksNot measured
- Multimodal1 benchmarkVerified
- Inst. Following0 benchmarksNot measured
BenchLM is tracking Sakana Fugu-Ultra, but this profile is currently excluded from the public leaderboard because it still lacks enough non-generated benchmark coverage to rank safely. Only non-generated public benchmark rows appear below.
Sakana Fugu-Ultra is a proprietary model with a 1M token context window. It uses explicit chain-of-thought reasoning, which typically improves performance on math and complex reasoning tasks at the cost of higher latency and token usage.
Sakana Fugu-Ultra sits inside the Sakana Fugu family alongside Sakana Fugu, Fugu Cyber. This profile currently has 11 of 323 tracked benchmarks. BenchLM only exposes non-generated benchmark rows publicly, so missing categories stay blank until a sourced evaluation is available.
Peer position
Exact provisional scores and ranks for the closest listed peers. A score can appear before a model clears the evidence threshold for a rank, so equal scores can have different rank states.
Range 77.44–83.93
- Claude Mythos 5AnthropicCompare#183.93Claude Mythos 5 is #1 with a score of 83.93.
- Claude Fable 5AnthropicCompare#283.68Claude Fable 5 is #2 with a score of 83.68.
- GPT-5.6 SolOpenAICompare#381.96GPT-5.6 Sol is #3 with a score of 81.96.
- Kimi K3Moonshot AICompare#480.96Kimi K3 is #4 with a score of 80.96.
- Claude Opus 4.8AnthropicCompare#578.34Claude Opus 4.8 is #5 with a score of 78.34.
- Muse Spark 1.1MetaCompare#677.44Muse Spark 1.1 is #6 with a score of 77.44.
- Sakana Fugu-UltraCurrent modelSakana AIUnrankedNot measuredSakana Fugu-Ultra is Unranked with a score of Not measured.
Category percentile
More
Relative position among models eligible for each sourced category. A higher percentile means a stronger position within that category's ranked cohort; 100 is highest.
Category evidence
Scores and ranks appear only where this model has published benchmark evidence. Categories without displayable source records remain not measured.
| Category | Score | Rank | Percentile | Weight | Benchmarks | Evidence |
|---|---|---|---|---|---|---|
| AgenticRank Not rankedWeight 22%1 benchmarkVerified | 82.7 | Not ranked | Not available | 22% | 1 benchmark | Verified |
| CodingRank Not rankedWeight 20%5 benchmarksVerified | 81.5 | Not ranked | Not available | 20% | 5 benchmarks | Verified |
| ReasoningRank Not rankedWeight 17%1 benchmarkVerified | 89.5 | Not ranked | Not available | 17% | 1 benchmark | Verified |
| KnowledgeRank Not rankedWeight 12%3 benchmarksVerified | 83.2 | Not ranked | Not available | 12% | 3 benchmarks | Verified |
| MathWeight 5%0 benchmarksNot measured | Not measured | Not ranked | Not available | 5% | 0 benchmarks | Not measured |
| MultilingualWeight 7%0 benchmarksNot measured | Not measured | Not ranked | Not available | 7% | 0 benchmarks | Not measured |
| MultimodalRank Not rankedWeight 12%1 benchmarkVerified | 75.4 | Not ranked | Not available | 12% | 1 benchmark | Verified |
| Inst. FollowingWeight 5%0 benchmarksNot measured | Not measured | Not ranked | Not available | 5% | 0 benchmarks | Not measured |
Benchmark Details
Rows below have a displayable published verification record. Each source link and provenance note remains in the page HTML while its category is closed. Source-unverified manual rows and generated rows stay hidden.
Agentic1 benchmark
Coding5 benchmarks
Scientific Code Benchmark
Reasoning1 benchmark
Knowledge3 benchmarks
Graduate-Level Google-Proof Q&A
GPQA Diamond
Humanity's Last Exam without tools
Multimodal1 benchmark
CharXiv Reasoning
Frequently Asked Questions
How does Sakana Fugu-Ultra perform overall in AI benchmarks?
Sakana Fugu-Ultra has 11 published benchmark scores on BenchLM, but it does not yet have enough non-generated coverage to receive a global overall rank.
Is Sakana Fugu-Ultra good for knowledge and understanding?
Sakana Fugu-Ultra has visible benchmark coverage in knowledge and understanding, but BenchLM does not currently assign it a global category rank there.
Is Sakana Fugu-Ultra good for coding and programming?
Sakana Fugu-Ultra has visible benchmark coverage in coding and programming, but BenchLM does not currently assign it a global category rank there.
Is Sakana Fugu-Ultra good for reasoning and logic?
Sakana Fugu-Ultra has visible benchmark coverage in reasoning and logic, but BenchLM does not currently assign it a global category rank there.
Is Sakana Fugu-Ultra good for agentic tool use and computer tasks?
Sakana Fugu-Ultra has visible benchmark coverage in agentic tool use and computer tasks, but BenchLM does not currently assign it a global category rank there.
Is Sakana Fugu-Ultra good for multimodal and grounded tasks?
Sakana Fugu-Ultra has visible benchmark coverage in multimodal and grounded tasks, but BenchLM does not currently assign it a global category rank there.
Which sibling models are related to Sakana Fugu-Ultra?
Sakana Fugu-Ultra belongs to the Sakana Fugu family. Related variants on BenchLM include Sakana Fugu, Fugu Cyber.
Does Sakana Fugu-Ultra have full benchmark coverage on BenchLM?
Not yet. Sakana Fugu-Ultra currently has 11 published benchmark scores out of the 323 benchmarks BenchLM tracks. BenchLM only exposes non-generated public benchmark rows, so missing categories stay blank until a sourced evaluation is available.
What is the context window size of Sakana Fugu-Ultra?
Sakana Fugu-Ultra has a published context window of 1M, which determines how much text it can process in a single interaction.
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