text model comparison
Muse Spark 1.3 vs Muse Spark Open
Muse Spark 1.3 and Muse Spark Open are both current text models, from Meta. On Arena WebDev, Muse Spark 1.3 scores 1656 Elo and Muse Spark Open 1526 Elo (Arena, measured October 28, 2026). Both accept about 1.05M tokens of context (1,048,576 and 1,000,000).
- Higher Arena WebDev
- Muse Spark 1.31656 Elo against 1526 Elo
- Longer context window
- Muse Spark 1.31.05M tokens against 1M tokens
- Newer release
- Muse Spark OpenOct 2026 against Sep 2026
Data verified November 3, 2026 · Dataset 2026-11-03
Side by side
Muse Spark 1.3 and Muse Spark Open, line by line
Prices in effect today, compared at the same tier wherever both list one. The better value in each row is highlighted.
| Fact | Muse Spark 1.3 | Muse Spark Open |
|---|---|---|
| Price | ||
| Price per 1M input tokens | $1.25 | Not listed |
| Price per 1M output tokens | $4.25 | Not listed |
| Independent benchmarks | ||
| Arena WebDev | 1656 Elo (#13 of 45) (better) | 1526 Elo (#35 of 45) |
| FrontierMath Tiers 1-3 (v2) | 74.4% (#21 of 42) (better) | 69.8% (#24 of 42) |
| Arena Text | 1495 Elo (#7 of 51) | Not measured |
| GPQA Diamond | Not measured | 88.6% (#34 of 41) |
| SimpleQA Verified | Not measured | 56.6% (#16 of 38) |
| Specs | ||
| Provider | Meta | Meta |
| Release date | September 2, 2026 | October 15, 2026 |
| Access | API only | open weights |
| Context window | 1,048,576 tokens | 1,000,000 tokens |
| Max output | Not reported | Not reported |
| Input | text, image, audio, video | text, image, video, audio |
| Output | text | text |
Charts
Against every current text model
Where Muse Spark 1.3 and Muse Spark Open land among the current models of their task, on every independent benchmark, on price and on context.
Where each stands
On Arena WebDev, Muse Spark 1.3 ranks #13 and Muse Spark Open #35 of 45 current models. Each bar is the share of current models it beats: on score, price and context.
Independent benchmarks
Arena Text
Muse Spark 1.3:#7of 51
1,495 Elo · ahead of 88%
Muse Spark Open: Not scored
Arena WebDev
Muse Spark 1.3:#13of 45
1,656 Elo · ahead of 70%
Muse Spark Open:#35of 45
1,526 Elo · ahead of 23%
FrontierMath Tiers 1-3 (v2)
Muse Spark 1.3:#21of 42
74.4% · ahead of 51%
Muse Spark Open:#24of 42
69.8% · ahead of 44%
GPQA Diamond
Muse Spark 1.3: Not scored
Muse Spark Open:#34of 41
88.6% · ahead of 18%
SimpleQA Verified
Muse Spark 1.3: Not scored
Muse Spark Open:#16of 38
56.6% · ahead of 59%
Price and context
Price per 1M input tokens
Muse Spark 1.3:#23of 52
$1.25 · cheaper than 53%
Muse Spark Open: Not listed
Price per 1M output tokens
Muse Spark 1.3:#25of 52
$4.25 · cheaper than 53%
Muse Spark Open: Not listed
Context window
Muse Spark 1.3:#11of 64
1.05M tokens · longer than 67%
Muse Spark Open:#26of 64
1M tokens · longer than 22%
Quality against price
Muse Spark 1.3 scores 1,495 at $2 (blended price per 1M tokens). The line joins the current models no other beats on both price and Arena Text score; hover any point to name it.
Quality against price: the data
| Model | Provider | Blended price per 1M tokens | Arena Text (Elo) |
|---|---|---|---|
| Gemini 4 Argon | $4 | 1,520 | |
| Claude Opus 5.5 | Anthropic | $8 | 1,509 |
| Muse Wonder | Meta | $8 | 1,507 |
| Claude Fable 5 | Anthropic | $20 | 1,504 |
| Claude Fable 5.1 | Anthropic | $20 | 1,504 |
| Gemini 3.8 Flash | $1.50 | 1,496 | |
| Muse Spark 1.3 | Meta | $2 | 1,495 |
| Claude Opus 5 | Anthropic | $10 | 1,492 |
| Kimi K3 | Moonshot Kimi | $6 | 1,488 |
| GPT-5.6 Sol | OpenAI | $8 | 1,485 |
| Gemini 3.6 Flash | $3 | 1,483 | |
| GPT-5.5 | OpenAI | $11 | 1,482 |
| Claude Opus 4.8 | Anthropic | $10 | 1,482 |
| Qwen3.8-Max | Alibaba Qwen | $3 | 1,482 |
| GPT-6.1 Sol | OpenAI | $4 | 1,481 |
| GLM-5.3 | Z.ai | $2.15 | 1,481 |
| MiMo-V2.6-Pro | Xiaomi MiMo | $0.54 | 1,480 |
| Claude Sonnet 5.5 | Anthropic | $4 | 1,477 |
| GLM-5.3-Flash | Z.ai | $0.24 | 1,477 |
| GPT-6 Astra | OpenAI | $20 | 1,476 |
| DeepSeek-V4.1-Flash | DeepSeek | $0.52 | 1,476 |
| GPT-5.4 | OpenAI | $5.63 | 1,475 |
| Gemini 3 Flash Preview | $1.13 | 1,473 | |
| Grok 4.20 | xAI | $1.56 | 1,472 |
| GPT-5.6 Terra | OpenAI | $4.50 | 1,467 |
| Grok 4.5 | xAI | $3 | 1,465 |
| DeepSeek-V4-Pro | DeepSeek | $1.98 | 1,465 |
| Claude Sonnet 5 | Anthropic | $4 | 1,462 |
| GPT-6 Sol | OpenAI | $4 | 1,458 |
| Gemini 3.5 Flash-Lite | $0.85 | 1,456 | |
| Grok 4.6 | xAI | $3 | 1,455 |
| GPT-5.6 Luna | OpenAI | $0.45 | 1,453 |
| MiMo-V2.6-Flash | Xiaomi MiMo | $0.18 | 1,448 |
| Step 5 Preview | StepFun | $1.43 | 1,448 |
| Grok 4.3 | xAI | $1.56 | 1,442 |
| GPT-6 Luna | OpenAI | $0.20 | 1,441 |
| Grok 4.7 | xAI | $3 | 1,441 |
| Mistral Large 4 | Mistral AI | $1.05 | 1,432 |
| Claude Haiku 5.5 | Anthropic | $0.20 | 1,425 |
| GPT-4.1 | OpenAI | $3.50 | 1,415 |
| Solar Pro 4 | Upstage | $0.52 | 1,388 |
| GPT-4.1 mini | OpenAI | $0.70 | 1,383 |
| GPT-4.1 nano | OpenAI | $0.18 | 1,322 |
Cost
What each costs
Example workloads at each provider's listed rates, then every other rate either one lists. The cheaper figure in each row is highlighted.
| Workload or rate | Muse Spark 1.3 | Muse Spark Open |
|---|---|---|
| Other listed rates | ||
| 1M input tokens, cached | $0.15 | Not listed |
Your own bill will differ. These figures use list prices and example workloads. The AI Model Cost Audit reviews your real usage, shortlists models that score as well for each task for less, and estimates the savings.
Launch price $100, regular price $150
Verdict
When to choose each
Muse Spark 1.3
Where it leads
- Higher Arena WebDev score, 1656 Elo vs 1526 Elo
- Higher FrontierMath Tiers 1-3 (v2) score, 74.4% vs 69.8%
- A cached-input rate, $0.15 per 1M tokens
Best for
- Tool-heavy agent loops where fewer calls per task matters as much as the per-token rate
- Coding agents at volume, where its coding scores and low price line up
Watch out for
- Meta’s own documentation states audio understanding is not fully supported and response quality may be degraded on requests containing audio
- The much cheaper contributor endpoint (about $0.10 / $0.20 per million) is priced that way in exchange for Meta training on your traffic. The standard tier is the rate recorded here.
- Meta’s scorecard has it trailing Claude Opus 5 on every broader agent-workflow benchmark it published, including GDPVal-AA v2, despite winning the coding rows
Muse Spark Open
Where it leads
- Open weights you can run yourself
Best for
- Self-hosted coding and agent work on owned infrastructure
- Long-context multimodal analysis where data must stay in-house
Watch out for
- The Muse Model License limits commercial use; it is not an open-source licence
- Meta does not serve it on its own Model API, so hosted prices come from third parties
- Self-hosting needs at least 700GB of GPU memory in NVFP4 or 2TB in BF16
From benchmark to production
Building on Muse Spark 1.3 or Muse Spark Open?
Public scores rarely hold on your own data. We test both models on your real tasks, then build the agent or pipeline around the one that wins.
AI Model Cost AuditLaunch price $100, regular price $150What the audit includes
FAQ
Muse Spark 1.3 vs Muse Spark Open FAQ
Do Muse Spark 1.3 and Muse Spark Open discount cached input?
Muse Spark 1.3 lists a cached-input rate of $0.15 per 1M tokens, 88% below its standard input rate. No cached-input rate is listed for Muse Spark Open.
Which scores higher on independent benchmarks, Muse Spark 1.3 or Muse Spark Open?
Muse Spark 1.3 leads on Arena WebDev, 1656 Elo to 1526 Elo; Muse Spark 1.3 leads on FrontierMath Tiers 1-3 (v2), 74.4% to 69.8%. Scores are independent evaluations, not either vendor's launch figures.
Which has the larger context window, Muse Spark 1.3 or Muse Spark Open?
Both accept about 1.05M tokens of context (1,048,576 and 1,000,000).
Can I run Muse Spark 1.3 or Muse Spark Open myself?
Muse Spark Open is released as open weights you can run yourself; Muse Spark 1.3 is available through its provider's API only.
Further reading
More on Muse Spark 1.3 and Muse Spark Open
Related comparisons
- Claude Haiku 5.5 vs Muse Spark 1.3
- Muse Spark Open vs Muse Wonder
- Mistral Large 4 vs Muse Spark 1.3
- MiniMax M3.1 Flash vs Muse Spark Open
- DeepSeek-V4-Pro vs Muse Spark 1.3
- Beam 1.0 vs Muse Spark Open
- Gemini 3.6 Flash vs Muse Spark 1.3
- Muse Spark Open vs Nemotron 3.5 Super VL
- Gemini 3.8 Flash vs Muse Spark 1.3
- Grok 4.20 vs Muse Spark 1.3
- Grok 4.3 vs Muse Spark 1.3
- GPT-6.1 Terra vs Muse Spark 1.3
Production evaluation
Choosing between Muse Spark 1.3 and Muse Spark Open?
Public benchmarks narrow the shortlist. We run both on your own tasks, data and cost limits, then build the routing and review controls to run the winner in production.
- A head-to-head evaluation on your real workload
- Routing between models by cost and difficulty