gpt-oss-120b (batch) Open vs 
Muse Spark 1.2 Paid
gpt-oss-120b (batch) vs Muse Spark 1.2 compared — price per token, context window, multimodality, openness and which to choose. Can the open-source model replace the paid one? Full 2026 breakdown.
Muse Spark 1.2 — full profile ›
Prices & specs refreshed from live data · olud.ai
Open-model prices = cheapest provider via OpenRouter; official maker rates may be higher.
$0.6 /M outputNo per-token fees if you self-host
$4.25 /M outputManaged API (no infra to run)
gpt-oss-120b (batch) vs Muse Spark 1.2 specs
| Spec | gpt-oss-120b (batch) | Muse Spark 1.2 | Winner |
|---|---|---|---|
| Maker | OpenAI | Meta | – |
| Type | Open-weight | Proprietary | |
| Context window | 131K tokens | 1M tokens | |
| Input price | $0.15/M · free self-host | $1.25/M | |
| Output price | $0.6/M · free self-host | $4.25/M | |
| Vision / multimodal | No | Yes | |
| Tool / function calling | Yes | Yes | = Tie |
| Self-hostable | Yes | No (API only) | |
| License | Apache 2.0 | Proprietary |
Price gap & when to choose each
gpt-oss-120b (batch) is ~7.1× cheaper than Muse Spark 1.2 on output tokens ($0.6 vs $4.25 per M tokens).
- You want to self-host or run on your cloud
- You prioritize data privacy & control
- You want the lowest operating costs
- You are building open or reproducible AI
- You want frontier performance through a managed API
- You need the longer 1M context window
- You value reliability & ecosystem
- You don't want to manage infrastructure
Feature comparison
| Capability | gpt-oss-120b (batch) | Muse Spark 1.2 |
|---|---|---|
| Open weights (downloadable) | ✓ | ✗ |
| Self-hostable | ✓ | ✗ |
| Runs fully offline | ✓ | ✗ |
| Vision / multimodal | ✗ | ✓ |
| Tool / function calling | ✓ | ✓ |
| 1M+ context window | ✗ | ✓ |
Benchmarks: gpt-oss-120b (batch) vs Muse Spark 1.2
Independent benchmark scores measured by Artificial Analysis. Higher is better (except latency).
Benchmark data by Artificial Analysis.
How gpt-oss-120b (batch) and Muse Spark 1.2 score
| Criterion | gpt-oss-120b (batch) | Muse Spark 1.2 |
|---|---|---|
| Cost-efficiency | 5.0 | 4.0 |
| Context window | 3.5 | 5.0 |
| Openness | 5.0 | 1.5 |
| Self-hosting | 5.0 | 1.0 |
| Multimodality | 3.5 | 5.0 |
Scores come from live data — output price (cost), context length, open vs closed weights (openness & self-hosting) and vision/tool support (multimodality). Raw task quality isn't scored here; it depends on your benchmark — see the verdict.
What each model is
gpt-oss-120b (batch) Open
gpt-oss-120b is an open-weight, 117B-parameter Mixture-of-Experts (MoE) language model from OpenAI designed for high-reasoning, agentic, and general-purpose production use cases. It activates 5.1B parameters per forward pass and is optimize
Muse Spark 1.2 Paid
Muse Spark 1.2 is a reasoning model from Meta, designed for complex agentic tasks. It accepts text, images, video, audio, and PDF documents, returns text, and offers a 1M-token context...
Other models in these families
These variants are tracked but not compared here — one page per family keeps the comparison readable.
Frequently asked questions
Is gpt-oss-120b (batch) as good as Muse Spark 1.2?
gpt-oss-120b (batch) is open-weight and competitive on many tasks, but Muse Spark 1.2 may still lead on the hardest reasoning and agentic work. The gap keeps narrowing — benchmark both on your actual use case before deciding.
Can I run gpt-oss-120b (batch) locally?
Yes. gpt-oss-120b (batch) has open weights, so you can self-host it on your own GPUs or run it via a low-cost API. Muse Spark 1.2 is API-only and cannot be self-hosted.
How much cheaper is gpt-oss-120b (batch)?
gpt-oss-120b (batch) costs $0.6/M output vs $4.25/M for Muse Spark 1.2 — roughly 7x cheaper via API, and free if you self-host.
gpt-oss-120b (batch) vs Muse Spark 1.2 — which should I pick in 2026?
Choose gpt-oss-120b (batch) if you want to self-host, keep your data private and skip per-token fees — it's open-weight and runs on your own hardware. Choose Muse Spark 1.2 if you want frontier capability through a managed API with zero infrastructure to run.
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