Model comparison
Claude Fable 5 vs Sakana Fugu
Head-to-head evidence from 3 shared benchmark results across 2 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Claude Fable 5 #2 (Supported); Sakana Fugu unranked (Not scored). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude Fable 5 and Sakana Fugu share 3 comparable benchmark results. 3 of 8 categories are comparable. 31 results are unique to Claude Fable 5; 8 to Sakana Fugu.
Updated July 23, 2026- Shared results
- 3
- Claude Fable 5 only
- 31
- Sakana Fugu only
- 8
- Comparable categories
- 3 / 8
Treat this as a split decision. Claude Fable 5 makes more sense if coding is the priority or you need the larger 1M+ context window; Sakana Fugu is the better fit if multimodal & grounded is the priority.
Confidence note. This is a partial-evidence comparison with 3 shared benchmark results across 2 evidence categories; 3 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Claude Fable 5 and Sakana Fugu 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.
Claude Fable 5 gives you the larger context window at 1M+, compared with 1M for Sakana Fugu.
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 | Claude Fable 5 | Δ | Sakana Fugu |
|---|---|---|---|
| Coding | Claude Fable 589.2 | Margin← 29.5 | Sakana Fugu59.7 |
| Multimodal | Claude Fable 557.9 | Margin→ 27.2 | Sakana Fugu85.1 |
| Agentic | Claude Fable 584.6 | Margin← 4.4 | Sakana Fugu80.2 |
| Reasoning | Claude Fable 5Not measured | MarginNo overlap | Sakana Fugu86.6 |
| Knowledge | Claude Fable 5Not measured | MarginNo overlap | Sakana Fugu95.5 |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
SWE-bench Pro
CodingA 80%B 59%Winner: Claude Fable 5Δ 21SWE-bench Pro: Claude Fable 5 scored 80%; Sakana Fugu scored 59%. Claude Fable 5 wins this benchmark. - Source ↗
Terminal-Bench 2.0
AgenticA 84.3%B 80.2%Winner: Claude Fable 5Δ 4.1Terminal-Bench 2.0: Claude Fable 5 scored 84.3%; Sakana Fugu scored 80.2%. Claude Fable 5 wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude Fable 5 | Sakana Fugu | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude Fable 5$10 input / $50 output | Sakana FuguNot available | A complete price comparison is not available. |
| Generation speedtokens per second | Claude Fable 5Not available | Sakana FuguNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude Fable 5Not available | Sakana FuguNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude Fable 51M+ | Sakana Fugu1M | Claude Fable 5 lists the larger context window. |
Benchmark Deep Dive
AgenticClaude Fable 5 wins13 benchmarks
| Benchmark | Claude Fable 5 | Sakana Fugu | Result |
|---|---|---|---|
| Terminal-Bench 2.0Source | 84.3% | 80.2% | Claude Fable 5 leads |
| OSWorld-VerifiedSource | 85% | — | Not comparable |
| GDPval-AASource | 1748 | — | Not comparable |
| AA Agentic IndexSource | 52.8% | — | Not comparable |
| τ²-bench resultsSource | 98.5% | — | Not comparable |
| GDPval-AASource | 62.4% | — | Not comparable |
| AA BriefcaseSource | 1574 | — | Not comparable |
| AA AutomationBenchSource | 48.6% | — | Not comparable |
| AA EnterpriseOps-GymSource | 51.1% | — | Not comparable |
| AA Harvey LABSource | 93.6% | — | Not comparable |
| AA Tau3 BankingSource | 26.8% | — | Not comparable |
| terminalBenchHardSource | 62.9% | — | Not comparable |
| aaTerminalBench21Source | 84.6% | — | Not comparable |
CodingClaude Fable 5 wins12 benchmarks
| Benchmark | Claude Fable 5 | Sakana Fugu | Result |
|---|---|---|---|
| SWE-bench VerifiedSource | 95% | — | Not comparable |
| SWE-bench ProSource | 80% | 59% | Claude Fable 5 leads |
| FrontierCode 1.1 MainSource | 53.5% | — | Not comparable |
| Terminal-Bench 2.0Source | 84.3% | 80.2% | Claude Fable 5 leads |
| cursorBench31Source | 70.6% | — | Not comparable |
| cursorBench32Source | 70.5% | — | Not comparable |
| VulcanBench v3Source | 87.0% | — | Not comparable |
| AA Coding IndexSource | 76.5% | — | Not comparable |
| AA-SciCodeSource | 60.2% | — | Not comparable |
| LiveCodeBench v6Source | — | 92.9% | Not comparable |
| LiveCodeBench ProSource | — | 87.8% | Not comparable |
| SciCodeSource | — | 60.1% | Not comparable |
Reasoning3 benchmarks
Knowledge9 benchmarks
| Benchmark | Claude Fable 5 | Sakana Fugu | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 59.9% | — | Not comparable |
| AA-GPQA DiamondSource | 92.6% | — | Not comparable |
| AA-HLESource | 53.3% | — | Not comparable |
| AA-Omniscience IndexSource | 40.2% | — | Not comparable |
| AA-Omniscience AccuracySource | 61.4% | — | Not comparable |
| AA-Omniscience Hallucination RateSource | 54.9% | — | Not comparable |
| GPQASource | — | 95.5% | Not comparable |
| GPQA-DSource | — | 95.5% | Not comparable |
| HLE w/o toolsSource | — | 47.2% | Not comparable |
MultimodalSakana Fugu wins4 benchmarks
Inst. Following1 benchmarks
| Benchmark | Claude Fable 5 | Sakana Fugu | Result |
|---|---|---|---|
| AA-IFBenchSource | 63.5% | — | Not comparable |
Frequently Asked Questions (4)
Which is better, Claude Fable 5 or Sakana Fugu?
Claude Fable 5 and Sakana Fugu 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, Claude Fable 5 or Sakana Fugu?
Claude Fable 5 has the edge for coding in this comparison, averaging 89.2 versus 59.7. Inside this category, SWE-bench Pro is the benchmark that creates the most daylight between them.
Which is better for agentic tasks, Claude Fable 5 or Sakana Fugu?
Claude Fable 5 has the edge for agentic tasks in this comparison, averaging 84.6 versus 80.2. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
Which is better for multimodal and grounded tasks, Claude Fable 5 or Sakana Fugu?
Sakana Fugu has the edge for multimodal and grounded tasks in this comparison, averaging 85.1 versus 57.9. Claude Fable 5 stays close enough that the answer can still flip depending on your workload.
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