Which is better, Claude Sonnet 4.5 or Granite 4.2 3B?

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Which is better, Claude Sonnet 4.5 or Granite 4.2 3B?: Across 6 shared benchmarks, Claude Sonnet 4.5 scores higher on 4 and Granite 4.2 3B on 2. The widest gap is τ³-Bench, where Granite 4.2 3B scores 51 against 19.

Claude Sonnet 4.5 vs Granite 4.2 3B

Across 6 shared benchmarks, Claude Sonnet 4.5 scores higher on 4 and Granite 4.2 3B on 2. The widest gap is τ³-Bench, where Granite 4.2 3B scores 51 against 19.

AnthropicvsIBM6 shared benchmarks4–2 head-to-head

Benchmark	Claude Sonnet 4.5	Granite 4.2 3B
AIME25 no tools	88	78.3
GPQA Diamond	83.4	54.8
LiveCodeBench v6	64	69.7
MMLU-Pro	88.2	67.8
scicode	45	24.1
τ³-Bench	19	51

Best tracked score per model per benchmark (default configuration; source-attributed). ↓ marks lower-is-better metrics. Open either model for its full surface, provenance and pricing.