// Meta
Muse Spark Open
A Meta model. 5 prices across 5 channels side by side, each with its source and check date – plus specs, licence, speed and benchmarks.
- Official in/out per 1M
- —
- Lowest (modal)
- $1.25 / $4.25
- Context
- 1M
- AA index
- 38.9
Prices checked 2026-10-22Official sources linked on every rowNo estimates
01Specs at a glance
Official values first; gaps filled from OpenRouter’s API where the vendor page is silent.
| Vendor | Meta |
|---|---|
| Context window | 1M (1,000,000 tokens) |
| Max output | 262K |
| Input | Text · Image · Video · File/PDF · Audio |
| Output | Text |
| Tool calling / JSON | Yes / Yes |
| Weights & licence | Open weights · muse-model-license (custom) · Hugging Face gated – request access |
| Parameters | 822B (from weight files) |
| Released | Oct 16, 2026 (OpenRouter listing date) |
| Model IDs | meta/muse-spark-open |
02Prices on 5 channels
Per 1M tokens, in the currency each source publishes (1 USD = 6.7 CNY for the blended column). Sorted: official first, then cheapest.
| Channel | Source | Input | Output | Cache hit | Blended $ | Context | Notes |
|---|---|---|---|---|---|---|---|
| modal · unknown Via OpenRouter / provider listed there | OpenRouter 10-22 | $1.25 | $4.25 | $0.15 | 2 | 1M | Modal price as listed on OpenRouter (pass-through; quantization=unknown); not checked against Modal's own page |
| Together · unknown Via OpenRouter / provider listed there | OpenRouter 10-22 | $1.25 | $4.25 | $0.15 | 2 | 1.05M | Together price as listed on OpenRouter (pass-through; quantization=unknown); not checked against Together's own page |
| Nebius · fp4 Via OpenRouter / provider listed there | OpenRouter 10-22 | $1.25 | $4.25 | $0.15 | 2 | 1.05M | Nebius price as listed on OpenRouter (pass-through; quantization=fp4); not checked against Nebius's own page |
| Fireworks · unknown Via OpenRouter / provider listed there | OpenRouter 10-22 | $1.25 | $4.25 | $0.15 | 2 | 1.05M | Fireworks price as listed on OpenRouter (pass-through; quantization=unknown); not checked against Fireworks's own page |
| BaseTen · fp4 Via OpenRouter / provider listed there | OpenRouter 10-22 | $1.25 | $4.25 | $0.15 | 2 | 1.05M | BaseTen price as listed on OpenRouter (pass-through; quantization=fp4); not checked against BaseTen's own page |
“Official” = vendor pricing page; “Platform” = the platform’s own pricing page; “OpenRouter” = price listed on OpenRouter, not checked on the platform’s site. Click a source tag to open the original page.
03Where you can use it
Derived only from the price sources above. Country restrictions are set by each vendor – check their terms before you sign up.
- Via OpenRouter / provider listed there
modal · Together · Nebius · Fireworks · BaseTen - Self-host the open weights
GPU / VRAM sizing and build plans→ - Free option
Muse Spark Open 816B-A42B→
04Performance
Speed and AA index from Artificial Analysis public leaderboards (not our own tests); benchmark scores from our benchmark library, best result per benchmark.
- AA indexMuse Spark Open (Xhigh)
- 38.9
- Output speed (median)
- 137 tok/s
- Time to first token
- 0.83s
- AA index per $ (blended)
- 19.43
05Price changes we recorded
All price changes →From our daily re-checks of the sources above.
- 2026-10-22 · Nebius · cache read— → 0.15 USD
- 2026-10-19 · BaseTen · new listing
- 2026-10-19 · Fireworks · new listing
- 2026-10-19 · Nebius · new listing
- 2026-10-19 · Together · new listing
- 2026-10-19 · modal · new listing
06More from Meta
FAQ
How much does the Muse Spark Open API cost?
There is no official pay-as-you-go price in our data. The lowest listed price is $1.25 / $4.25 on modal.
What is the context window of Muse Spark Open?
1M tokens of context, up to 262K output tokens. Platforms may cap it lower – see the table.
Is Muse Spark Open open source?
Yes, the weights are published on Hugging Face (meta-models/Muse-Spark-Open-816B-A42B). Licence: muse-model-license (custom).