Models · Compare
Claude Sonnet 4.6 vs Qwen3.5 Plus
Rows highlighted in warm gray are where the models differ. Numbers carry their as-of date and primary source.
Specs
| Field | A: Claude Sonnet 4.6 | B: Qwen3.5 Plus |
|---|---|---|
| Released | 2026-02-17 | 2026-02-16 |
| Developer | Anthropic | Alibaba |
| Openness | Proprietary | Open |
| License | Proprietary | Apache-2.0 |
| OSI-approved | no | yes |
| Data released | no | no |
| Training code | no | no |
| Architecture | unknown | moe |
| Total params | — | 397B |
| Active params | — | 17B |
| Experts | — | — |
| Context window | 1.0M | 1.0M |
| Attention | unknown | unknown |
| Position enc. | unknown | rope-yarn |
| Pretraining tokens | — | — |
| Post-training | rlhf, constitutional | sft, rlhf |
| Training hardware | — | — |
| $/M input | $3.00 | — |
| $/M output | $15.00 | — |
| Output tok/sec | 49 | — |
Benchmarks
Missing scores render as not reported; never inferred. Bold highlights the leader per benchmark.
General reasoning
| GPQA-Diamond | 79.9 2026-05-21 | — |
Code
| SWE-Bench Verified | 80.2 2026-02-17 | — |
Context · A
Mid-tier Sonnet refresh shipped February 17 2026 at the same $3 / $15 pricing as Sonnet 4.5, with a 1M context window in beta. Default model for Free and Pro plans on Claude.ai at launch. Anthropic reported Claude Code users preferred Sonnet 4.6 over Sonnet 4.5 roughly 70 percent of the time.
Context · B
Flagship of the Qwen 3.5 generation. 397B MoE activating 17B per token with 512 experts. First Qwen open-weights model with native vision input. Per Alibaba's evals, the 397B-A17B outperforms the trillion-parameter Qwen3 Max on several reasoning and coding benchmarks while running roughly 19x faster at 256K context.