Muse Spark 1.2vso4-mini
Muse Spark 1.2 | o4-mini | |
|---|---|---|
| Specifications | ||
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. | — | $1.10 |
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. | — | $4.40 |
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. | — | $0.275 |
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 | — |
Cheapest outputLowest output rate across third-party providers, excluding the lab itself. May come from a different provider than the cheapest input. | $4.25Meta | — |
| Benchmarks | ||
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. | 50% | 8% |
| BenchmarksPublished by one model only | ||
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% | — |
| Overview | ||
| Company | Meta | OpenAI |
| Release date | Aug 5 2026 | Apr 16 2025 |
| Access | Proprietary | Proprietary |
Other comparisons
Muse Spark 1.2vsClaude Fable 5.1o4-minivsClaude Fable 5.1Muse Spark 1.2vsGemini 3.8 Flasho4-minivsGemini 3.8 FlashMuse Spark 1.2vsGrok 4.6o4-minivsGrok 4.6Muse Spark 1.2vsDeepSeek-V4.1-Flasho4-minivsDeepSeek-V4.1-FlashMuse Spark 1.2vsMistral Medium 3.5o4-minivsMistral Medium 3.5Muse Spark 1.2vsKimi K3o4-minivsKimi K3
Frequently asked questions
Muse Spark 1.2 leads o4-mini on 1 of the 1 benchmark they both report (BullshitBench v2). Only o4-mini has a verified first-party API price: $1.10 per million input tokens and $4.40 per million output tokens. No pay-as-you-go API rate is tracked for Muse Spark 1.2. o4-mini shipped 476 days before Muse Spark 1.2, so benchmark comparisons should account for the intervening progress.
Published specifications for these two models are limited — see each model page for the latest details.
On BullshitBench v2, Muse Spark 1.2 leads at 50% vs o4-mini at 8%.