Models · Compare
GLM-4.5 vs Claude Opus 4.1
Rows highlighted in warm gray are where the models differ. Numbers carry their as-of date and primary source.
Specs
| Field | A: GLM-4.5 | B: Claude Opus 4.1 |
|---|---|---|
| Released | 2025-07-28 | 2025-08-05 |
| Developer | Zhipu AI | Anthropic |
| Openness | Open | Proprietary |
| License | MIT | Proprietary |
| OSI-approved | yes | no |
| Data released | no | no |
| Training code | no | no |
| Architecture | moe | unknown |
| Total params | 355B | — |
| Active params | 32B | — |
| Experts | — | — |
| Context window | 128K | — |
| Attention | unknown | unknown |
| Position enc. | unknown | unknown |
| Pretraining tokens | 23.0T | — |
| Post-training | sft, rlhf | rlhf, constitutional |
| Training hardware | — | — |
| $/M input | — | — |
| $/M output | — | — |
| Output tok/sec | — | — |
Benchmarks
Missing scores render as not reported; never inferred. Bold highlights the leader per benchmark.
Code
| SWE-Bench Verified | 64.2 2025-07-28 | 74.5 2025-08-05 |
Math
| AIME 2024 | 91.0 2025-07-28 | — |
Context · A
Zhipu's first ARC-focused flagship (agentic, reasoning, coding), released July 28 2025 as 355B total / 32B active MoE under MIT. 23T-token pretraining run. Hybrid thinking / non-thinking modes. GLM-4.5-Air (106B / 12B) released alongside. Zhipu reports 90.6 percent tool-calling success vs Claude 4 Sonnet's 89.5 percent.
Context · B
Drop-in upgrade for Opus 4 released August 5 2025, same pricing and API surface. Anthropic flagged multi-file code refactoring and agentic search as the main improvements. Extended thinking budget of up to 64K tokens carries over from Opus 4.