Muse Spark 1.2vsGLM-4.5-Air
Muse Spark 1.2 | 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 |
Context windowHow much text the model can hold in mind at once — your question, any documents you attach, the conversation so far, and its own reply. Go past it and the earliest part falls out of view. | 1M | — |
| 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 |
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. | $1.25Meta | $0.13Novita |
Cheapest outputLowest output rate across third-party providers, excluding the lab itself. May come from a different provider than the cheapest input. | $4.25Meta | $0.85Novita |
| BenchmarksPublished by one model only | ||
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. | — | 59.8% |
DeepSWE 1.1Agentic coding — Artificial Analysis' independent test of deep, agentic software-engineering work — the AI has to plan and carry out substantial coding tasks end to end. (Version 1.1 of the test.) Higher is better. | 59.3% | — |
Terminal-Bench 2.1Agentic terminal coding — Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? Higher is better. | 82.9% | — |
Arena Elo (Text)Community preference — Real people chat with two anonymous AIs side by side and vote for the answer they prefer. Votes become a chess-style Elo rating on arena.ai — it measures which AI people actually like, not test scores. Higher is better. | 1498 | — |
Arena Elo (Code)Community preference (code) — Like the text arena, but people vote on which AI writes better code. The votes become a chess-style Elo rating on arena.ai. Higher is better. | 1535 | — |
Arena Elo (Vision)Community preference (vision) — Real people give two anonymous AIs the same image — a photo, a screenshot, a diagram — and vote for whichever reads it better. The votes become a chess-style Elo rating on arena.ai. It measures which AI people find more useful at looking at things, not how it scores on a fixed test set. Higher is better. | 1292 | — |
| Overview | ||
| Company | Meta | Z.ai |
| Release date | Aug 5 2026 | Jul 28 2025 |
| Access | Proprietary | Open Weight |
Other comparisons
Frequently asked questions
Muse Spark 1.2 and GLM-4.5-Air don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. 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 Muse Spark 1.2. GLM-4.5-Air shipped 373 days before Muse Spark 1.2, so benchmark comparisons should account for the intervening progress.
Muse Spark 1.2 is proprietary, while GLM-4.5-Air is open weight.
Direct benchmark comparisons are unavailable — Muse Spark 1.2 and GLM-4.5-Air don't publish scores on any of the same benchmarks.
Muse Spark 1.2 was released by Meta on Aug 5 2026.
GLM-4.5-Air was released by Z.ai on Jul 28 2025.
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 Muse Spark 1.2. Rates are pay-as-you-go API prices verified on August 18, 2026.
Muse Spark 1.2 is a proprietary model released by Meta. GLM-4.5-Air is an open weight model released by Z.ai.