Grok 4.20 BetavsGLM-4.5-Air
Grok 4.20 Beta | 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 · base tier | ||
Input priceWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it. | $1.25 | $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. | $2.50 | $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. | $0.20 | $0.03 |
Cheapest inputLowest input rate across third-party providers, excluding the lab itself. The cheapest endpoint may run a quantised build or a shorter context — see "Available from" on the model page. | — | $0.13Novita |
Cheapest outputLowest output rate across third-party providers, excluding the lab itself. May come from a different provider than the cheapest input. | — | $0.85Novita |
| 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. | 76.7% | 59.8% |
| BenchmarksPublished by one model only | ||
BullshitBench v2Nonsense detection — Given 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. | 56% | — |
ARC-AGI-2Abstract reasoning — Puzzle-style tests of abstract reasoning and pattern-finding — the kind of thing people find easy but AIs often struggle with. Higher is better. | 53.3% | — |
| Overview | ||
| Company | SpaceXAI | Z.ai |
| Release date | Feb 17 2026 | Jul 28 2025 |
| Access | Proprietary | Open Weight |
Other comparisons
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Frequently asked questions
Grok 4.20 Beta leads GLM-4.5-Air on 1 of the 1 benchmark they both report (SWE-Bench Verified). GLM-4.5-Air is cheaper on both input and output: $0.20 vs $1.25 per million input tokens, and $1.10 vs $2.50 per million output tokens. Figures are base-tier rates. GLM-4.5-Air shipped 204 days before Grok 4.20 Beta, so benchmark comparisons should account for the intervening progress.
Grok 4.20 Beta is proprietary, while GLM-4.5-Air is open weight.
On SWE-Bench Verified, Grok 4.20 Beta leads at 76.7% vs GLM-4.5-Air at 59.8%.