Model comparison
Claude Fable 5.1 vs Gemini 4 Argon
Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 56.5 on the Noometry Index.
Last verified . 21 shared benchmarks.
GoogleSummary
- They share 21 benchmarks with published results for both. Claude Fable 5.1 scores higher in 7 categories and Gemini 4 Argon in 3 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Claude Fable 5.1 leads 76.7 to 44.2.
- The biggest single-benchmark swing is APEX-Agents: 68.6% for Claude Fable 5.1 and 82.2% for Gemini 4 Argon.
Side by side
| Claude Fable 5.1 | Gemini 4 Argon | |
|---|---|---|
| Provider | Anthropic | |
| Noometry Index | 69.0 | 56.5 |
| Released | 2026-09-01 | 2026-09-30 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | — |
| Max output | 128K | — |
| Input $ / M tokens | $10 | — |
| Output $ / M tokens | $50 | — |
| Results tracked | 52 | 21 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Claude Fable 5.1 leads
Claude Fable 5.1: 74.7 (#1), Gemini 4 Argon: 62.0 (#9)
| Benchmark | Claude Fable 5.1 | Gemini 4 Argon |
|---|---|---|
| LMArena WebDev | 1744 | 1678 |
| FrontierSWE | 56.3% | 55% |
| SciCode | 63.1% | 61.8% |
| LMArena Coding | 1528 | 1550 |
| FrontierCode | 50.9% | — |
| CursorBench | 51.8% | — |
| GSO | 88.2% | — |
| WeirdML | 92.9% | — |
| MirrorCode | 73.3% | — |
| ALE-Bench | 2,143 | — |
Agentic & Tool Use Claude Fable 5.1 leads
Claude Fable 5.1: 50.7 (#5), Gemini 4 Argon: 49.2 (#8)
| Benchmark | Claude Fable 5.1 | Gemini 4 Argon |
|---|---|---|
| APEX-Agents | 68.6% | 82.2% |
| Vending-Bench 2 | 5,422 | 13,718 |
| Remote Labor Index | 17.9% | — |
| GDP.pdf | 29.6% | — |
Reasoning Claude Fable 5.1 leads
Claude Fable 5.1: 76.7 (#7), Gemini 4 Argon: 44.2 (#47)
| Benchmark | Claude Fable 5.1 | Gemini 4 Argon |
|---|---|---|
| CritPt | 31.1% | 27.1% |
| LMArena Hard Prompts | 1526 | 1548 |
| ARC-AGI-2 | 90% | — |
| NYT Connections (extended) | 90% | — |
| ARC-AGI-1 | 97.5% | — |
| Chess Puzzles | 47% | — |
| EBR-Bench | 57.1% | — |
| Mystery Game Puzzles | 58% | — |
| DTBench | 97.6% | — |
| LMCA | 65.5% | — |
| Epoch Capabilities Index | 164.7 | — |
Math Claude Fable 5.1 leads
Claude Fable 5.1: 89.6 (#4), Gemini 4 Argon: 73.9 (#17)
| Benchmark | Claude Fable 5.1 | Gemini 4 Argon |
|---|---|---|
| ProofBench | 100% | 99% |
| LMArena Math | 1525 | 1536 |
| FrontierMath (Tiers 1-3) | 90.2% | — |
| FrontierMath Tier 4 | 87.8% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| FrontierMath Erdős | 0% | — |
Knowledge Claude Fable 5.1 leads
Claude Fable 5.1: 69.6 (#6), Gemini 4 Argon: 43.9 (#89)
| Benchmark | Claude Fable 5.1 | Gemini 4 Argon |
|---|---|---|
| LMArena Expert | 1535 | 1553 |
| Humanity's Last Exam | 46.5% | — |
| SimpleQA Verified | 70.8% | — |
Multimodal Claude Fable 5.1 leads
Claude Fable 5.1: 53.9 (#4), Gemini 4 Argon: 46.5 (#14)
| Benchmark | Claude Fable 5.1 | Gemini 4 Argon |
|---|---|---|
| Blueprint-Bench 2 | 41.9% | 54.4% |
| LMArena Vision | 1318 | — |
| Furniture Assembly | 70% | — |
| LMArena Document | 1513 | — |
Multilingual Gemini 4 Argon leads
Claude Fable 5.1: 59.1 (#3), Gemini 4 Argon: 60.3 (#1)
| Benchmark | Claude Fable 5.1 | Gemini 4 Argon |
|---|---|---|
| LMArena Non-English | 1507 | 1523 |
| LMArena Chinese | 1586 | 1610 |
| LMArena Russian | 1521 | 1537 |
| LMArena Spanish | 1516 | 1497 |
| LMArena French | 1525 | — |
| LMArena German | 1500 | — |
| LMArena Japanese | 1543 | — |
| LMArena Korean | 1534 | — |
Instruction Following Too close to call
Claude Fable 5.1: 79.2 (#6), Gemini 4 Argon: 80.1 (#2)
| Benchmark | Claude Fable 5.1 | Gemini 4 Argon |
|---|---|---|
| LMArena Instruction Following | 1517 | 1538 |
Long Context Too close to call
Claude Fable 5.1: 46.7 (#20), Gemini 4 Argon: 47.6 (#15)
| Benchmark | Claude Fable 5.1 | Gemini 4 Argon |
|---|---|---|
| LMArena Longer Query | 1522 | 1549 |
Writing & Preference Claude Fable 5.1 leads
Claude Fable 5.1: 79.2 (#2), Gemini 4 Argon: 71.4 (#19)
| Benchmark | Claude Fable 5.1 | Gemini 4 Argon |
|---|---|---|
| LMArena Text | 1510 | 1534 |
| LMArena Creative Writing | 1507 | 1531 |
| LMArena Multi-Turn | 1492 | 1557 |
| EQ-Bench Creative Writing | 2162 | — |
Frequently asked questions
Is Claude Fable 5.1 better than Gemini 4 Argon?
Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 56.5 on the Noometry Index.
Is Claude Fable 5.1 or Gemini 4 Argon better for coding?
Claude Fable 5.1 scores higher on coding benchmarks: 74.7 versus 62.0 in the Noometry coding category.
How many benchmarks do Claude Fable 5.1 and Gemini 4 Argon share?
21 benchmarks have published results for both models. Claude Fable 5.1 has 52 scored results on Noometry and Gemini 4 Argon has 21.