Models
GPT vs Muse Spark Open
GPT (OpenAI) and Muse Spark Open (Meta) are two tools in the “Models” category of the OrigoTech directory. This page puts the information from their tool pages side by side: 9 criteria are filled in for both tools. No editorial opinion: every value comes from the tool page, which cites its sources.
Tool page data · Verified
Comparison table
| Criterion | GPT | Muse Spark Open |
|---|---|---|
| Vendor | OpenAI | Meta |
| Pricing | Paid | Free |
| Pricing details | API billed per token, e.g. gpt-6.1-sol at $2/$10 per million input/output tokens (source: developers.openai.com/api/docs/pricing). | Free weights on Hugging Face; API via Baseten, Fireworks AI, Groq, OpenRouter, Together AI and others (source: research.meta.ai/blog/muse-spark-open). |
| License | — | Muse Model License, not open source: it requires displaying "Built with Muse Spark Open" in every product that uses it (section 2) and a separate written agreement with Meta to offer it as an API ("Model as a Service") above $20M revenue over 12 months (section 3) (source: huggingface.co/meta-models/Muse-Spark-Open-816B-A42B). |
| Open source | — | No |
| Open weights | No | Yes |
| Platforms | API | API, Local |
| MCP support | Yes | — |
| Context window | 1,050,000 tokens (GPT-6.1 Sol); depends on the model | 1 million tokens |
| Context (tokens) | 1,050,000 Source | 1,000,000 Source |
| Reference model | GPT-6.1 Sol | Muse Spark Open (816B-A42B) |
| Input price ($/M tokens) | $2 Source | — |
| Output price ($/M tokens) | $10 Source | — |
| Coding score | — | 60% (DeepSWE v1.1) Source |
| Release | ||
| Model comparator rows | GPT-6 Astra, GPT-6 Luna, GPT-5.3-Codex · Model comparison | — |
| Updated on |
“—”: information not filled in on the tool page.
What they have in common
- Shared platforms: API.
Differences
- GPT is published by OpenAI, Muse Spark Open by Meta.
- Pricing model: paid for GPT, free for Muse Spark Open.
- Only Muse Spark Open publishes its weights (downloadable).
- Platforms only Muse Spark Open offers: Local.
- Context window: 1,050,000 tokens for GPT, 1,000,000 for Muse Spark Open.
- Release date: September 29, 2026 for GPT, October 15, 2026 for Muse Spark Open.
Sources
- Menlo Ventures: 2025 State of Generative AI in the Enterprise
- OpenAI: API pricing
- OpenAI: GPT-6.1 Sol model page (context)
- Meta: Muse Spark Open announcement
- Hugging Face: model card and Muse licence
- NVIDIA: Muse Spark Open on GB300 NVL72