Model comparison
Claude 2.1 vs Qwen3-4B
Qwen3-4B is the stronger model overall, scoring 31.9 to 25.2 on the Noometry Index.
Last verified . 2 shared benchmarks.
Alibaba (Qwen)Summary
- They share 2 benchmarks with published results for both. Claude 2.1 scores higher in 1 category and Qwen3-4B in 2 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where Qwen3-4B leads 29.7 to 10.2.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 1.9% for Claude 2.1 and 52.2% for Qwen3-4B.
- Qwen3-4B has downloadable open weights; the other is API-only.
Side by side
| Claude 2.1 | Qwen3-4B | |
|---|---|---|
| Provider | Anthropic | Alibaba (Qwen) |
| Noometry Index | 25.2 | 31.9 |
| Released | 2023-11-21 | 2025-04-29 |
| Weights | Proprietary | Open |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 7 | 6 |
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Category by category
Coding Not comparable
Claude 2.1: 26.2 (#327), Qwen3-4B: —
| Benchmark | Claude 2.1 | Qwen3-4B |
|---|---|---|
| WeirdML | 7.1% | — |
Agentic & Tool Use Not comparable
Claude 2.1: —, Qwen3-4B: 27.6 (#100)
| Benchmark | Claude 2.1 | Qwen3-4B |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 35.7% |
Reasoning Claude 2.1 leads
Claude 2.1: 21.4 (#221), Qwen3-4B: 19.2 (#268)
| Benchmark | Claude 2.1 | Qwen3-4B |
|---|---|---|
| Chess Puzzles | — | 4% |
| DTBench | 51% | — |
| Epoch Capabilities Index | 119.27 | — |
| ForecastBench | 54.2 | — |
Math Qwen3-4B leads
Claude 2.1: 10.2 (#315), Qwen3-4B: 29.7 (#240)
| Benchmark | Claude 2.1 | Qwen3-4B |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 1.9% | 52.2% |
| MathArena Final-Answer Competitions | — | 38.5% |
Knowledge Qwen3-4B leads
Claude 2.1: 15.4 (#292), Qwen3-4B: 33.0 (#208)
| Benchmark | Claude 2.1 | Qwen3-4B |
|---|---|---|
| GPQA Diamond | 33% | 52.3% |
| Vectara Hallucination Rate | — | 5.7% |
| MMLU | 73.5% | — |
Frequently asked questions
Is Claude 2.1 better than Qwen3-4B?
Qwen3-4B is the stronger model overall, scoring 31.9 to 25.2 on the Noometry Index.
How many benchmarks do Claude 2.1 and Qwen3-4B share?
2 benchmarks have published results for both models. Claude 2.1 has 7 scored results on Noometry and Qwen3-4B has 6.