MODEL PROOF
Muse Spark 1.3
TRADE-OFF
A stored alternative has an equal-or-higher score and an equal-or-lower price, with capability losses.
MiMo-V2.6-Pro · Δ score 0.5 points · 73% lower measured price
- 944K → 131K max output
- no file input
- Independent LMArena score
- 1,489.8 ± 5.65 · 16,731 votes
- Context window
- 1.05M
- Maximum output
- 943.72K
- Input modalities
- text, image, video, file, audio
- Output modalities
- text
- Published input price
- $1.25 / 1M tokens
- Published output price
- $4.25 / 1M tokens
- Pricing kind
- fixed
Inspect complete billing conditions and endpoint terms below.
Price from Meta: the cheapest offer that is serving, at standard delivery, with at least 90% of the reference context and at the maker’s precision or better, at its standard rate.
Every price dimension · USD per million tokens
| Input | $1.25/M |
|---|---|
| Output | $4.25/M |
| Cached input | $0.150/M |
| Cache write | Unknown/M |
| Cache write 1h | Unknown/M |
| Reasoning | Unknown/M |
| Web search | $0.0025/call |
Who sells it
The same weights, different shops. Cheapest is not like-for-like when serving precision differs.
1 provider offers · rates, limits and conditions
Rates are USD per million tokens. Endpoint terms can differ even when the quoted price and precision match. A listed parameter is a provider declaration, not a task-success test.
| Seller | Input | Output | Precision | Uptime (1d) |
|---|---|---|---|---|
| Metameta Endpoint terms
| $1.25 | $4.25 | undeclared | 100.00% |
Independent scores
| LMArena Elo | 1489.8max |
|---|---|
| LMArena row | muse-spark-1.3-max |
LMArena Elo under CC BY 4.0. Absence of another board is not a score of zero.
Best rankings by task
- Websites #2 1356
- SVG #2 1324
- Full-stack apps #3 1312
- UI components #4 1352
- Code categories #5 1353
- 3D #5 1396
- Web apps #5 1297
- Data visualisation #6 1343
Per-task Elo and rank from Design Arena, via OpenRouter’s model feed. The rank is the feed’s, and it counts models OpenRouter does not list.
Capability
| Context window | 1M |
|---|---|
| Max output | 943K |
| Input modes | text, image, video, file, audio |
| Tool use | yes |
| Reasoning | always on |
| Open weights | Unknown |
Provenance
| Price source | openrouter.ai |
|---|---|
| Fetched | 2026-10-21 |
| Held | Input types kept at the published record of 2026-10-06 while a newer upstream value is reviewed. |
| Quality data | verified |
Muse Spark 1.3 is a multimodal reasoning model from Meta for long-running agentic, multi-agent, and coding workflows. It is designed to keep track of information across extended tasks, work through...
Questions this page answers
What does Muse Spark 1.3 cost?
$1.25/M in, $4.25/M out in this catalogue, as of the fetch date on this page. That is the API row, not a subscription.
Does Muse Spark 1.3 have an independent quality score?
Muse Spark 1.3 has an LMArena score in this catalogue.
What beats Muse Spark 1.3?
MiMo-V2.6-Pro has an equal-or-higher measured score and an equal-or-lower price, with capability trade-offs.
Does this page use Artificial Analysis scores for Muse Spark 1.3?
No. Artificial Analysis figures are not published here. Quality on this page is LMArena Elo where a score exists; otherwise the row is unrated.
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[](https://undominated.ai/models/meta__muse-spark-1.3/)<a href="https://undominated.ai/models/meta__muse-spark-1.3/"><img src="https://undominated.ai/badge/meta__muse-spark-1.3.svg" alt="Muse Spark 1.3 — Undominated.ai dominance verdict" height="36"></a>Direct file: https://undominated.ai/badge/meta__muse-spark-1.3.svg — a static SVG, written by scripts/build-badges.mjs on every build, so the copy you embed is never
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