Model comparison
Claude Sonnet 5.5 vs Grok-2 (Dec 2024)
Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 33.4 on the Noometry Index.
Last verified . 2 shared benchmarks.
Summary
- They share 2 benchmarks with published results for both. Claude Sonnet 5.5 scores higher in 4 categories and Grok-2 (Dec 2024) in 0 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Sonnet 5.5 leads 88.7 to 19.6.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 100% for Claude Sonnet 5.5 and 11.5% for Grok-2 (Dec 2024).
Side by side
| Claude Sonnet 5.5 | Grok-2 (Dec 2024) | |
|---|---|---|
| Provider | Anthropic | xAI |
| Noometry Index | 60.5 | 33.4 |
| Released | 2026-09-28 | 2024-08-13 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | — |
| Max output | 128K | — |
| Input $ / M tokens | $2 | — |
| Output $ / M tokens | $10 | — |
| Results tracked | 16 | 34 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 65.5 (#6), Grok-2 (Dec 2024): 32.9 (#254)
| Benchmark | Claude Sonnet 5.5 | Grok-2 (Dec 2024) |
|---|---|---|
| FrontierCode | 52.1% | — |
| CursorBench | 55.5% | — |
| LMArena WebDev | 1699 | — |
| FrontierSWE | 61.9% | — |
| SciCode | 61% | — |
| WeirdML | — | 22.2% |
| LiveBench Coding | — | 46.4% |
| LMArena Coding | — | 1288 |
| ALE-Bench | 1,819 | — |
Agentic & Tool Use Not comparable
Claude Sonnet 5.5: 44.9 (#14), Grok-2 (Dec 2024): —
| Benchmark | Claude Sonnet 5.5 | Grok-2 (Dec 2024) |
|---|---|---|
| APEX-Agents | 75.5% | — |
Reasoning Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 52.4 (#29), Grok-2 (Dec 2024): 16.4 (#294)
| Benchmark | Claude Sonnet 5.5 | Grok-2 (Dec 2024) |
|---|---|---|
| SimpleBench | — | 22.7% |
| CritPt | 31.4% | — |
| LiveBench Reasoning | — | 54.8% |
| LMArena Hard Prompts | — | 1272 |
| Mystery Game Puzzles | 65% | — |
| DTBench | — | 65.2% |
| LiveBench Data Analysis | — | 54.5% |
| Epoch Capabilities Index | — | 130.48 |
| LiveBench | — | 54.3% |
Math Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 88.7 (#4), Grok-2 (Dec 2024): 19.6 (#278)
| Benchmark | Claude Sonnet 5.5 | Grok-2 (Dec 2024) |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 100% | 11.5% |
| FrontierMath (Tiers 1-3) | 88.8% | — |
| FrontierMath Tier 4 | 80.5% | — |
| ProofBench | 100% | — |
| LiveBench Math | — | 54.9% |
| LMArena Math | — | 1283 |
| MATH Level 5 | — | 63.5% |
| FrontierMath (Feb 2025 set) | — | 0.7% |
Knowledge Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 66.0 (#11), Grok-2 (Dec 2024): 29.8 (#225)
| Benchmark | Claude Sonnet 5.5 | Grok-2 (Dec 2024) |
|---|---|---|
| GPQA Diamond | 95.6% | 53.8% |
| SimpleQA Verified | 46.5% | — |
| Confabulations | — | 20.1% |
| LMArena Expert | — | 1254 |
Multimodal Not comparable
Claude Sonnet 5.5: 53.2 (#5), Grok-2 (Dec 2024): —
| Benchmark | Claude Sonnet 5.5 | Grok-2 (Dec 2024) |
|---|---|---|
| Furniture Assembly | 75% | — |
Multilingual Not comparable
Claude Sonnet 5.5: —, Grok-2 (Dec 2024): 43.3 (#183)
| Benchmark | Claude Sonnet 5.5 | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Non-English | — | 1282 |
| LMArena Chinese | — | 1289 |
| LMArena French | — | 1317 |
| LMArena German | — | 1287 |
| LMArena Japanese | — | 1244 |
| LMArena Korean | — | 1237 |
| LMArena Russian | — | 1286 |
| LMArena Spanish | — | 1281 |
Instruction Following Not comparable
Claude Sonnet 5.5: —, Grok-2 (Dec 2024): 67.1 (#197)
| Benchmark | Claude Sonnet 5.5 | Grok-2 (Dec 2024) |
|---|---|---|
| LiveBench Instruction Following | — | 69.6% |
| LMArena Instruction Following | — | 1270 |
Long Context Not comparable
Claude Sonnet 5.5: —, Grok-2 (Dec 2024): 38.7 (#186)
| Benchmark | Claude Sonnet 5.5 | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Longer Query | — | 1276 |
Writing & Preference Not comparable
Claude Sonnet 5.5: —, Grok-2 (Dec 2024): 48.8 (#192)
| Benchmark | Claude Sonnet 5.5 | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Text | — | 1305 |
| LMArena Creative Writing | — | 1284 |
| Short-Story Creative Writing | — | 63.6% |
| LMArena Multi-Turn | — | 1290 |
| LiveBench Language | — | 45.6% |
Frequently asked questions
Is Claude Sonnet 5.5 better than Grok-2 (Dec 2024)?
Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 33.4 on the Noometry Index.
Is Claude Sonnet 5.5 or Grok-2 (Dec 2024) better for coding?
Claude Sonnet 5.5 scores higher on coding benchmarks: 65.5 versus 32.9 in the Noometry coding category.
How many benchmarks do Claude Sonnet 5.5 and Grok-2 (Dec 2024) share?
2 benchmarks have published results for both models. Claude Sonnet 5.5 has 16 scored results on Noometry and Grok-2 (Dec 2024) has 34.