Claude 3 OpusvsGLM-4.5-Air
Claude 3 Opus | GLM-4.5-Air | |
|---|---|---|
| Specifications | ||
ParametersA rough measure of how big the model is. More parameters usually means more capable and more expensive to run, though it is a poor guide on its own — a smaller, newer model often beats a larger, older one. | — | 106B |
| API pricingUSD per 1M tokens · lower wins | ||
Input priceWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it. | — | $0.20 |
Output priceWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one. | — | $1.10 |
Cached input priceA reduced rate for text you send over and over. If every request starts with the same instructions or the same document, the provider keeps a copy ready and charges less to read it again. | — | $0.03 |
| Benchmarks | ||
SWE-Bench VerifiedCoding — Real 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. | 33% | 59.8% |
| BenchmarksPublished by one model only | ||
GPQA DiamondScience — Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 50.4% | — |
| Overview | ||
| Company | Anthropic | Z.ai |
| Release date | Mar 4 2024 | Jul 28 2025 |
| Access | Proprietary | Open Weight |
Frequently asked questions
GLM-4.5-Air leads Claude 3 Opus on 1 of the 1 benchmark they both report (SWE-Bench Verified). Only GLM-4.5-Air has a verified first-party API price: $0.20 per million input tokens and $1.10 per million output tokens. No pay-as-you-go API rate is tracked for Claude 3 Opus. Claude 3 Opus shipped 511 days before GLM-4.5-Air, so benchmark comparisons should account for the intervening progress.
Claude 3 Opus is proprietary, while GLM-4.5-Air is open weight.
On SWE-Bench Verified, GLM-4.5-Air leads at 59.8% vs Claude 3 Opus at 33%.
Claude 3 Opus was released by Anthropic on Mar 4 2024.
GLM-4.5-Air was released by Z.ai on Jul 28 2025.
GLM-4.5-Air leads on SWE-Bench Verified — Claude 3 Opus 33% vs GLM-4.5-Air 59.8%.
Only GLM-4.5-Air has a verified first-party API price: $0.20 per million input tokens and $1.10 per million output tokens. No pay-as-you-go API rate is tracked for Claude 3 Opus. Rates are pay-as-you-go API prices verified on August 18, 2026.
Claude 3 Opus is a proprietary model released by Anthropic. GLM-4.5-Air is an open weight model released by Z.ai.