Model comparison
Claude Fable 5 vs Grok-2 (Dec 2024)
Claude Fable 5 is the stronger model overall, scoring 66.8 to 33.7 on the Noometry Index.
Last verified . 23 shared benchmarks.
Summary
- They share 23 benchmarks with published results for both. Claude Fable 5 scores higher in 8 categories and Grok-2 (Dec 2024) in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Fable 5 leads 88.5 to 20.8.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 100% for Claude Fable 5 and 11.5% for Grok-2 (Dec 2024).
Side by side
| Claude Fable 5 | Grok-2 (Dec 2024) | |
|---|---|---|
| Provider | Anthropic | xAI |
| Noometry Index | 66.8 | 33.7 |
| Released | 2026-06-07 | 2024-08-13 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | — |
| Max output | 128K | — |
| Input $ / M tokens | $10 | — |
| Output $ / M tokens | $50 | — |
| Results tracked | 62 | 34 |
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Category by category
Coding Claude Fable 5 leads
Claude Fable 5: 70.6 (#4), Grok-2 (Dec 2024): 33.3 (#258)
| Benchmark | Claude Fable 5 | Grok-2 (Dec 2024) |
|---|---|---|
| WeirdML | 91.9% | 22.2% |
| LMArena Coding | 1519 | 1287 |
| DeepSWE | 69.9% | — |
| FrontierCode | 53.5% | — |
| LMArena WebDev | 1625 | — |
| FrontierSWE | 47% | — |
| SciCode | 61% | — |
| GSO | 78.4% | — |
| LiveBench Coding | — | 46.4% |
| MirrorCode | 63.9% | — |
| ALE-Bench | 2,041 | — |
Agentic & Tool Use Not comparable
Claude Fable 5: 54.0 (#2), Grok-2 (Dec 2024): —
| Benchmark | Claude Fable 5 | Grok-2 (Dec 2024) |
|---|---|---|
| APEX-Agents | 63.6% | — |
| Remote Labor Index | 16.1% | — |
| τ²-bench Banking | 39.7% | — |
| PostTrainBench | 41.8% | — |
| GBAEval | 74.5% | — |
| GDP.pdf | 30% | — |
| LMArena Search | 1230 | — |
| Vending-Bench 2 | 5,680 | — |
Reasoning Claude Fable 5 leads
Claude Fable 5: 76.8 (#6), Grok-2 (Dec 2024): 16.9 (#299)
| Benchmark | Claude Fable 5 | Grok-2 (Dec 2024) |
|---|---|---|
| SimpleBench | 81.9% | 22.7% |
| LMArena Hard Prompts | 1508 | 1272 |
| DTBench | 98.4% | 65.2% |
| Epoch Capabilities Index | 162.06 | 130.48 |
| ARC-AGI-2 | 89.2% | — |
| Kagi LLM Benchmark | 91.4% | — |
| NYT Connections (extended) | 92.7% | — |
| ARC-AGI-1 | 98.5% | — |
| CritPt | 28.6% | — |
| Chess Puzzles | 41% | — |
| EnigmaEval | 39.3% | — |
| EBR-Bench | 39.5% | — |
| LiveBench Reasoning | — | 54.8% |
| Mystery Game Puzzles | 52% | — |
| LiveBench Data Analysis | — | 54.5% |
| LMCA | 61.1% | — |
| Surface Evolver Bench | 95% | — |
| Bench to the Future 3 | 0.13 | — |
| LiveBench | — | 54.3% |
Math Claude Fable 5 leads
Claude Fable 5: 88.5 (#5), Grok-2 (Dec 2024): 20.8 (#284)
| Benchmark | Claude Fable 5 | Grok-2 (Dec 2024) |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 100% | 11.5% |
| LMArena Math | 1519 | 1283 |
| FrontierMath (Tiers 1-3) | 87% | — |
| FrontierMath Tier 4 | 90.2% | — |
| ProofBench | 95% | — |
| LiveBench Math | — | 54.9% |
| MATH Level 5 | — | 63.5% |
| FrontierMath (Feb 2025 set) | — | 0.7% |
| FrontierMath Erdős | 0% | — |
Knowledge Claude Fable 5 leads
Claude Fable 5: 62.2 (#25), Grok-2 (Dec 2024): 29.8 (#233)
| Benchmark | Claude Fable 5 | Grok-2 (Dec 2024) |
|---|---|---|
| GPQA Diamond | 85.9% | 53.8% |
| LMArena Expert | 1534 | 1254 |
| SimpleQA Verified | 70.7% | — |
| Confabulations | — | 20.1% |
Multimodal Not comparable
Claude Fable 5: 45.3 (#17), Grok-2 (Dec 2024): —
| Benchmark | Claude Fable 5 | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Vision | 1324 | — |
| Blueprint-Bench 2 | 38.6% | — |
| Furniture Assembly | 35.8% | — |
| LMArena Document | 1496 | — |
Multilingual Claude Fable 5 leads
Claude Fable 5: 57.3 (#9), Grok-2 (Dec 2024): 43.1 (#188)
| Benchmark | Claude Fable 5 | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Non-English | 1481 | 1282 |
| LMArena Chinese | 1543 | 1289 |
| LMArena French | 1505 | 1318 |
| LMArena German | 1486 | 1287 |
| LMArena Japanese | 1506 | 1244 |
| LMArena Korean | 1488 | 1237 |
| LMArena Russian | 1504 | 1286 |
| LMArena Spanish | 1498 | 1281 |
Instruction Following Claude Fable 5 leads
Claude Fable 5: 78.6 (#8), Grok-2 (Dec 2024): 66.9 (#202)
| Benchmark | Claude Fable 5 | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Instruction Following | 1502 | 1270 |
| LiveBench Instruction Following | — | 69.6% |
Long Context Claude Fable 5 leads
Claude Fable 5: 46.3 (#23), Grok-2 (Dec 2024): 38.8 (#190)
| Benchmark | Claude Fable 5 | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Longer Query | 1509 | 1276 |
Writing & Preference Claude Fable 5 leads
Claude Fable 5: 75.9 (#5), Grok-2 (Dec 2024): 48.6 (#198)
| Benchmark | Claude Fable 5 | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Text | 1491 | 1305 |
| LMArena Creative Writing | 1494 | 1284 |
| LMArena Multi-Turn | 1504 | 1290 |
| Short-Story Creative Writing | — | 63.6% |
| EQ-Bench Creative Writing | 1943 | — |
| EQ-Bench 4 | 1340 | — |
| LiveBench Language | — | 45.6% |
Frequently asked questions
Is Claude Fable 5 better than Grok-2 (Dec 2024)?
Claude Fable 5 is the stronger model overall, scoring 66.8 to 33.7 on the Noometry Index.
Is Claude Fable 5 or Grok-2 (Dec 2024) better for coding?
Claude Fable 5 scores higher on coding benchmarks: 70.6 versus 33.3 in the Noometry coding category.
How many benchmarks do Claude Fable 5 and Grok-2 (Dec 2024) share?
23 benchmarks have published results for both models. Claude Fable 5 has 62 scored results on Noometry and Grok-2 (Dec 2024) has 34.