Model comparison
Claude Sonnet 5.5 vs Llama2 70b Steerlm Chat
Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 31.8 on the Noometry Index.
Last verified . 9 shared benchmarks.
NVIDIASummary
- They share 9 benchmarks with published results for both. Claude Sonnet 5.5 scores higher in 7 categories and Llama2 70b Steerlm Chat in 0 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Sonnet 5.5 leads 87.9 to 31.3.
- Llama2 70b Steerlm Chat has downloadable open weights; the other is API-only.
Side by side
| Claude Sonnet 5.5 | Llama2 70b Steerlm Chat | |
|---|---|---|
| Provider | Anthropic | NVIDIA |
| Noometry Index | 61.9 | 31.8 |
| Released | 2026-09-28 | — |
| Weights | Proprietary | Open |
| Context window | 1M | — |
| Max output | 128K | — |
| Input $ / M tokens | $2 | — |
| Output $ / M tokens | $10 | — |
| Results tracked | 32 | 9 |
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Category by category
Coding Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 67.3 (#6), Llama2 70b Steerlm Chat: 29.9 (#300)
| Benchmark | Claude Sonnet 5.5 | Llama2 70b Steerlm Chat |
|---|---|---|
| LMArena Coding | 1513 | 1025 |
| FrontierCode | 52.1% | — |
| CursorBench | 55.5% | — |
| LMArena WebDev | 1774 | — |
| FrontierSWE | 61.9% | — |
| SciCode | 61% | — |
| ALE-Bench | 1,819 | — |
Agentic & Tool Use Not comparable
Claude Sonnet 5.5: 45.0 (#16), Llama2 70b Steerlm Chat: —
| Benchmark | Claude Sonnet 5.5 | Llama2 70b Steerlm Chat |
|---|---|---|
| APEX-Agents | 75.5% | — |
Reasoning Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 54.0 (#28), Llama2 70b Steerlm Chat: 20.0 (#246)
| Benchmark | Claude Sonnet 5.5 | Llama2 70b Steerlm Chat |
|---|---|---|
| LMArena Hard Prompts | 1495 | 1047 |
| NYT Connections (extended) | 80.5% | — |
| CritPt | 31.4% | — |
| Mystery Game Puzzles | 65% | — |
| Epoch Capabilities Index | 165.03 | — |
Math Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 87.9 (#6), Llama2 70b Steerlm Chat: 31.3 (#226)
| Benchmark | Claude Sonnet 5.5 | Llama2 70b Steerlm Chat |
|---|---|---|
| LMArena Math | 1510 | 1072 |
| FrontierMath (Tiers 1-3) | 88.8% | — |
| FrontierMath Tier 4 | 80.5% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 100% | — |
| FrontierMath Erdős | 2.9% | — |
Knowledge Not comparable
Claude Sonnet 5.5: 66.0 (#12), Llama2 70b Steerlm Chat: —
| Benchmark | Claude Sonnet 5.5 | Llama2 70b Steerlm Chat |
|---|---|---|
| GPQA Diamond | 95.6% | — |
| SimpleQA Verified | 46.5% | — |
| LMArena Expert | 1540 | — |
Multimodal Not comparable
Claude Sonnet 5.5: 51.5 (#6), Llama2 70b Steerlm Chat: —
| Benchmark | Claude Sonnet 5.5 | Llama2 70b Steerlm Chat |
|---|---|---|
| LMArena Vision | 1289 | — |
| Furniture Assembly | 75% | — |
Multilingual Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 55.3 (#30), Llama2 70b Steerlm Chat: 28.8 (#270)
| Benchmark | Claude Sonnet 5.5 | Llama2 70b Steerlm Chat |
|---|---|---|
| LMArena Non-English | 1452 | 1063 |
| LMArena Chinese | 1522 | — |
| LMArena Russian | 1451 | — |
Instruction Following Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 78.3 (#11), Llama2 70b Steerlm Chat: 54.2 (#279)
| Benchmark | Claude Sonnet 5.5 | Llama2 70b Steerlm Chat |
|---|---|---|
| LMArena Instruction Following | 1495 | 1060 |
Long Context Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 45.9 (#28), Llama2 70b Steerlm Chat: 30.4 (#288)
| Benchmark | Claude Sonnet 5.5 | Llama2 70b Steerlm Chat |
|---|---|---|
| LMArena Longer Query | 1498 | 998 |
Writing & Preference Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 66.0 (#40), Llama2 70b Steerlm Chat: 31.6 (#283)
| Benchmark | Claude Sonnet 5.5 | Llama2 70b Steerlm Chat |
|---|---|---|
| LMArena Text | 1471 | 1098 |
| LMArena Creative Writing | 1465 | 1091 |
| LMArena Multi-Turn | 1474 | 1058 |
Frequently asked questions
Is Claude Sonnet 5.5 better than Llama2 70b Steerlm Chat?
Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 31.8 on the Noometry Index.
Is Claude Sonnet 5.5 or Llama2 70b Steerlm Chat better for coding?
Claude Sonnet 5.5 scores higher on coding benchmarks: 67.3 versus 29.9 in the Noometry coding category.
How many benchmarks do Claude Sonnet 5.5 and Llama2 70b Steerlm Chat share?
9 benchmarks have published results for both models. Claude Sonnet 5.5 has 32 scored results on Noometry and Llama2 70b Steerlm Chat has 9.