Claude 3.5 HaikuvsGLM-4.5
Claude 3.5 Haiku | GLM-4.5 | |
|---|---|---|
| Specifications | ||
Parameters | — | 355B |
Context window | — | 128k |
| Benchmarks | ||
Nonsense detection BullshitBench v2Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | 50%Best | 8% |
Coding SWE-Bench VerifiedReal coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. | 40.6% | 64.2%Best |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 41.6% | 79.1%Best |
| Overview | ||
| Company | Anthropic | Z.ai |
| Release date | Oct 22 2024 | Jul 28 2025 |
| Access | Proprietary | Open Weight |
Which is better: Claude 3.5 Haiku or GLM-4.5?
GLM-4.5 leads Claude 3.5 Haiku on 2 of the 3 benchmarks they both report (BullshitBench v2, SWE-Bench Verified, GPQA Diamond). Claude 3.5 Haiku shipped 279 days before GLM-4.5, so benchmark comparisons should account for the intervening progress.
Claude 3.5 Haiku is proprietary, while GLM-4.5 is open weight.
On BullshitBench v2, Claude 3.5 Haiku leads at 50% vs GLM-4.5 at 8%. On SWE-Bench Verified, GLM-4.5 leads at 64.2% vs Claude 3.5 Haiku at 40.6%. On GPQA Diamond, GLM-4.5 leads at 79.1% vs Claude 3.5 Haiku at 41.6%.
Frequently asked questions
Claude 3.5 Haiku was released by Anthropic on Oct 22 2024.
GLM-4.5 was released by Z.ai on Jul 28 2025.
GLM-4.5 leads on SWE-Bench Verified — Claude 3.5 Haiku 40.6% vs GLM-4.5 64.2%.
GLM-4.5 leads on GPQA Diamond — Claude 3.5 Haiku 41.6% vs GLM-4.5 79.1%.
Claude 3.5 Haiku is a proprietary model released by Anthropic. GLM-4.5 is an open weight model released by Z.ai.