Model comparison
Claude Sonnet 4.5 vs Nova Premier 1.0
Claude Sonnet 4.5 is the stronger model overall, scoring 44.0 to 37.7 on the Noometry Index.
Last verified . 6 shared benchmarks.
Summary
- They share 6 benchmarks with published results for both. Claude Sonnet 4.5 scores higher in 5 categories and Nova Premier 1.0 in 0 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Claude Sonnet 4.5 leads 66.7 to 51.0.
- The biggest single-benchmark swing is Omni-MATH: 55.3% for Claude Sonnet 4.5 and 35% for Nova Premier 1.0.
- Nova Premier 1.0 is cheaper at $2.50 / $12.50 per million input/output tokens, against $3 / $15 for Claude Sonnet 4.5.
Side by side
| Claude Sonnet 4.5 | Nova Premier 1.0 | |
|---|---|---|
| Provider | Anthropic | Amazon |
| Noometry Index | 44.0 | 37.7 |
| Released | 2025-09-29 | 2025-04-30 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | 1M |
| Max output | 64K | 10K |
| Input $ / M tokens | $3 | $2.50 |
| Output $ / M tokens | $15 | $12.50 |
| Results tracked | 73 | 6 |
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Category by category
Coding Not comparable
Claude Sonnet 4.5: 47.8 (#54), Nova Premier 1.0: —
| Benchmark | Claude Sonnet 4.5 | Nova Premier 1.0 |
|---|---|---|
| SWE-bench Verified | 71.3% | — |
| SWE-bench Verified (bash only) | 71.4% | — |
| LMArena WebDev | 1393 | — |
| SWE-bench Multilingual | 67% | — |
| SciCode | 44.7% | — |
| GSO | 14.7% | — |
| WeirdML | 47.7% | — |
| LMArena Coding | 1489 | — |
| ALE-Bench | 796.15 | — |
| AlgoTune | 1.52 | — |
Agentic & Tool Use Not comparable
Claude Sonnet 4.5: 38.1 (#30), Nova Premier 1.0: —
| Benchmark | Claude Sonnet 4.5 | Nova Premier 1.0 |
|---|---|---|
| Terminal-Bench | 46.5% | — |
| Berkeley Function Calling Leaderboard | 73.2% | — |
| GDPval | 42.5% | — |
| Remote Labor Index | 2.1% | — |
| τ²-bench Airline | 72% | — |
| τ²-bench Banking | 25.3% | — |
| τ²-bench Retail | 72.4% | — |
| τ²-bench Telecom | 84.9% | — |
| Cybench | 60% | — |
| DeepResearch Bench | 52.6% | — |
| OSWorld | 62.9% | — |
| LMArena Search | 1159 | — |
| METR Time Horizons | 67.4% | — |
| Vending-Bench 2 | 3,839 | — |
Reasoning Claude Sonnet 4.5 leads
Claude Sonnet 4.5: 26.9 (#113), Nova Premier 1.0: 22.3 (#182)
| Benchmark | Claude Sonnet 4.5 | Nova Premier 1.0 |
|---|---|---|
| Kagi LLM Benchmark | 57.9% | 44.8% |
| ARC-AGI-2 | 13.6% | — |
| SimpleBench | 54.3% | — |
| NYT Connections (extended) | 37.3% | — |
| ARC-AGI-1 | 63.7% | — |
| CritPt | 1.1% | — |
| Chess Puzzles | 12% | — |
| EnigmaEval | 6% | — |
| EBR-Bench | 2.4% | — |
| LMArena Hard Prompts | 1462 | — |
| Mystery Game Puzzles | 17% | — |
| DTBench | 83.2% | — |
| LMCA | 38.8% | — |
| Epoch Capabilities Index | 146.84 | — |
| ForecastBench | 61.9 | — |
Math Too close to call
Claude Sonnet 4.5: 31.9 (#190), Nova Premier 1.0: 31.5 (#194)
| Benchmark | Claude Sonnet 4.5 | Nova Premier 1.0 |
|---|---|---|
| Omni-MATH | 55.3% | 35% |
| FrontierMath (Tiers 1-3) | 23.9% | — |
| FrontierMath Tier 4 | 2.4% | — |
| OTIS Mock AIME 2024-2025 | 77.8% | — |
| ProofBench | 19% | — |
| LMArena Math | 1448 | — |
| MATH Level 5 | 97.7% | — |
| FrontierMath (Feb 2025 set) | 15.2% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |
Knowledge Claude Sonnet 4.5 leads
Claude Sonnet 4.5: 48.4 (#70), Nova Premier 1.0: 35.4 (#176)
| Benchmark | Claude Sonnet 4.5 | Nova Premier 1.0 |
|---|---|---|
| MMLU-Pro | 86.9% | 72.6% |
| GPQA (HELM) | 68.6% | 51.8% |
| GPQA Diamond | 82.3% | — |
| Humanity's Last Exam | 13.7% | — |
| SimpleQA Verified | 30.7% | — |
| Vectara Hallucination Rate | 12% | — |
| LMArena Expert | 1483 | — |
Multimodal Not comparable
Claude Sonnet 4.5: 34.1 (#84), Nova Premier 1.0: —
| Benchmark | Claude Sonnet 4.5 | Nova Premier 1.0 |
|---|---|---|
| VPCT | 39.8% | — |
| LMArena Document | 1450 | — |
Multilingual Not comparable
Claude Sonnet 4.5: 53.6 (#65), Nova Premier 1.0: —
| Benchmark | Claude Sonnet 4.5 | Nova Premier 1.0 |
|---|---|---|
| LMArena Non-English | 1425 | — |
| LMArena Chinese | 1459 | — |
| LMArena French | 1459 | — |
| LMArena German | 1427 | — |
| LMArena Japanese | 1390 | — |
| LMArena Korean | 1403 | — |
| LMArena Russian | 1436 | — |
| LMArena Spanish | 1457 | — |
Instruction Following Claude Sonnet 4.5 leads
Claude Sonnet 4.5: 75.2 (#74), Nova Premier 1.0: 66.9 (#201)
| Benchmark | Claude Sonnet 4.5 | Nova Premier 1.0 |
|---|---|---|
| IFEval | 85% | 80.3% |
| LMArena Instruction Following | 1459 | — |
Long Context Not comparable
Claude Sonnet 4.5: 45.2 (#45), Nova Premier 1.0: —
| Benchmark | Claude Sonnet 4.5 | Nova Premier 1.0 |
|---|---|---|
| LMArena Longer Query | 1476 | — |
Writing & Preference Claude Sonnet 4.5 leads
Claude Sonnet 4.5: 66.7 (#33), Nova Premier 1.0: 51.0 (#174)
| Benchmark | Claude Sonnet 4.5 | Nova Premier 1.0 |
|---|---|---|
| WildBench | 85.4% | 78.8% |
| LMArena Text | 1439 | — |
| LMArena Creative Writing | 1442 | — |
| EQ-Bench Creative Writing | 1678 | — |
| LMArena Multi-Turn | 1465 | — |
Frequently asked questions
Is Claude Sonnet 4.5 better than Nova Premier 1.0?
Claude Sonnet 4.5 is the stronger model overall, scoring 44.0 to 37.7 on the Noometry Index.
Which is cheaper, Claude Sonnet 4.5 or Nova Premier 1.0?
Nova Premier 1.0 is cheaper. It lists at $2.50 per million input tokens and $12.50 per million output tokens; Claude Sonnet 4.5 lists at $3 and $15.
Which has the bigger context window?
Both accept 1M tokens.
How many benchmarks do Claude Sonnet 4.5 and Nova Premier 1.0 share?
6 benchmarks have published results for both models. Claude Sonnet 4.5 has 73 scored results on Noometry and Nova Premier 1.0 has 6.