text model comparison
Beam 1.0 vs Muse Spark Open
Beam 1.0 and Muse Spark Open are both current text models, from Reflection AI and Meta. On Arena WebDev, Beam 1.0 scores 1436 Elo and Muse Spark Open 1526 Elo (Arena, measured October 28, 2026). Both accept 1,000,000 tokens of context.
- Higher Arena WebDev
- Muse Spark Open1526 Elo against 1436 Elo
- Newer release
- Beam 1.0Oct 2026 against Oct 2026
Data verified November 3, 2026 · Dataset 2026-11-03
Side by side
Beam 1.0 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 | Beam 1.0 | Muse Spark Open |
|---|---|---|
| Independent benchmarks | ||
| Arena WebDev | 1436 Elo (#38 of 45) | 1526 Elo (#35 of 45) (better) |
| Arena Text | 1436 Elo (#39 of 51) | Not measured |
| FrontierMath Tiers 1-3 (v2) | Not measured | 69.8% (#24 of 42) |
| GPQA Diamond | Not measured | 88.6% (#34 of 41) |
| SimpleQA Verified | Not measured | 56.6% (#16 of 38) |
| Specs | ||
| Provider | Reflection AI | Meta |
| Release date | October 16, 2026 | October 15, 2026 |
| Access | API and open weights | open weights |
| Context window | 1,000,000 tokens | 1,000,000 tokens |
| Max output | Not reported | Not reported |
| Input | text | text, image, video, audio |
| Output | text | text |
Charts
Against every current text model
Where Beam 1.0 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, Beam 1.0 ranks #38 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
Beam 1.0:#39of 51
1,436 Elo · ahead of 24%
Muse Spark Open: Not scored
Arena WebDev
Beam 1.0:#38of 45
1,436 Elo · ahead of 16%
Muse Spark Open:#35of 45
1,526 Elo · ahead of 23%
FrontierMath Tiers 1-3 (v2)
Beam 1.0: Not scored
Muse Spark Open:#24of 42
69.8% · ahead of 44%
GPQA Diamond
Beam 1.0: Not scored
Muse Spark Open:#34of 41
88.6% · ahead of 18%
SimpleQA Verified
Beam 1.0: Not scored
Muse Spark Open:#16of 38
56.6% · ahead of 59%
Price and context
Context window
Beam 1.0:#26of 64
1M tokens · longer than 22%
Muse Spark Open:#26of 64
1M tokens · longer than 22%
Verdict
When to choose each
Beam 1.0
Where it leads
No measured lead over Muse Spark Open in this data.
Best for
- Self-hosted coding agents under a permissive licence
- Fine-tuning or distilling a large open model
Watch out for
- Reflection API is a public beta that is free to start, with no published per-token price
- Text only, with no image, audio or video input
Muse Spark Open
Where it leads
- Higher Arena WebDev score, 1526 Elo vs 1436 Elo
- Accepts image, video and audio input
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 Beam 1.0 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
Beam 1.0 vs Muse Spark Open FAQ
Which scores higher on independent benchmarks, Beam 1.0 or Muse Spark Open?
Muse Spark Open leads on Arena WebDev, 1526 Elo to 1436 Elo. Scores are independent evaluations, not either vendor's launch figures.
Which has the larger context window, Beam 1.0 or Muse Spark Open?
Both accept 1,000,000 tokens of context.
How do Beam 1.0 and Muse Spark Open differ in features?
Beam 1.0 takes text input; Muse Spark Open takes text, image, video and audio.
Can I run Beam 1.0 or Muse Spark Open myself?
Beam 1.0 is released as open weights you can run yourself; Muse Spark Open is available through its provider's API only.
Further reading
More on Beam 1.0 and Muse Spark Open
Production evaluation
Choosing between Beam 1.0 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