AI model comparison
Muse Spark Open vs Muse Spark 1.3
Side by side comparison of Muse Spark Open and Muse Spark 1.3 on pricing, benchmark scores, context window, and more.
Muse Spark Open is a coding-optimized open-weight model.
- Input / 1M
- $1.25
- Output / 1M
- $4.25
- Context
- 1.05M
Muse Spark 1.3 is a multimodal reasoning model from Meta for long-running agentic, multi-agent, and coding workflows.
- Input / 1M
- $1.25
- Output / 1M
- $4.25
- Context
- 1.05M
Comparing image generators? Compare image models
At a glance
Quick verdict
How the two models stack up on the things people ask about most.
Lower price
Tie
Same price for a typical chat
Higher intelligence score
Muse Spark 1.3
36.4 vs 24.7 on Artificial Analysis
Larger context window
Tie
1.05M vs 1.05M tokens
Newer release
Muse Spark Open
Released October 15, 2026
Benchmarks
Benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
Coding index
Agentic index
Pricing
Muse Spark Open vs Muse Spark 1.3 API pricing
Per-token API rates. Cheaper option highlighted.
| Metric | ||
|---|---|---|
| Input tokensPer 1M tokens | $1.25 | $1.25 |
| Output tokensPer 1M tokens | $4.25 | $4.25 |
| Cached input (read)Per 1M tokens | $0.15 | $0.15 |
| Cache writePer 1M tokens | Not available | Not available |
| Web searchPer request | Not available | $0.0025 |
What it costs in practice
Estimated cost per 1,000 requests at standard rates. Coding and long-document figures also show the cost when the input is already cached.
Chat message
2K in, 500 out
Coding task
30K in, 4K out
Long document summary
150K in, 2K out
Specs
Context window and capabilities
How much each model can read, how much it can write, and what it accepts as input.
| Metric | ||
|---|---|---|
| Context window | 1.05M tokens | 1.05M tokens |
| Max output | 944K tokens | 944K tokens |
| Input types | Audio, File, Image, Text, Video | File, Image, Text, Video |
| Output types | Text | Text |
| Reasoning effort levels | Extra high, High, Medium, Low | Max, Extra high, High, Medium, Low, Minimal |
| Default reasoning effort | Medium | Medium |
| Release date | October 15, 2026 | September 2, 2026 |
Features
Supported features
API features available for each model.
| Metric | ||
|---|---|---|
| Tool calling | Supported | Supported |
| Structured outputs | Supported | Supported |
| JSON mode | Supported | Supported |
| Reasoning | Supported | Supported |
| Temperature | Supported | Supported |
| Stop sequences | Supported | Not supported |
| Deterministic seed | Supported | Not supported |
| Verbosity control | Not supported | Not supported |
Keep exploring
More on these models
Other head-to-heads, the full model page, and the alternatives list for each model.
- Muse Spark 1.3 vs Claude Opus 5.5
- Muse Spark 1.3 vs GPT-6 Astra
- Muse Spark 1.3 vs GPT-6.1 Sol
- Muse Spark 1.3 vs Claude Sonnet 5.5
- Muse Spark 1.3 vs GPT-6.1 Terra
- Muse Spark 1.3 vs Gemini 4 Argon
- Muse Spark 1.3 vs Claude Fable 5.1
- Muse Spark 1.3 vs Kimi K3.1 Pro
- Muse Spark 1.3 vs Muse Wonder
- Muse Spark 1.3 vs Claude Haiku 5.5
- Muse Spark 1.3 vs Grok 4.7
- Muse Spark 1.3 vs Qwen3.8 Max (0902)
- Muse Spark 1.3 vs GLM 5.3
- Muse Spark 1.3 vs Gemini 3.8 Flash
- Muse Spark 1.3 vs DeepSeek V4.1 Flash 1017
- Muse Spark 1.3 vs Step 5 Preview
- Muse Spark 1.3 vs Hy4 preview
Our take
Muse Spark 1.3 scores higher on the Artificial Analysis Intelligence Index (36.4 vs 24.7). The right pick depends on your workload, so the quickest way to settle it is to send the same prompt to both and compare.
FAQ
Frequently asked questions
Is Muse Spark Open or Muse Spark 1.3 cheaper?
Muse Spark Open and Muse Spark 1.3 cost the same for a typical chat (2K input tokens and 500 output tokens). Muse Spark Open costs $1.25 per 1M input tokens and $4.25 per 1M output tokens, and Muse Spark 1.3 costs $1.25 per 1M input tokens and $4.25 per 1M output tokens.
Which has a bigger context window, Muse Spark Open or Muse Spark 1.3?
Muse Spark Open supports up to 1.05M tokens of context, compared with 1.05M for Muse Spark 1.3.
Is Muse Spark Open smarter than Muse Spark 1.3?
On the Artificial Analysis Intelligence Index, Muse Spark Open scores 24.7 and Muse Spark 1.3 scores 36.4, putting Muse Spark 1.3 ahead. Benchmarks don't capture everything, so the best test is running your own prompts through both.
Can I use Muse Spark Open and Muse Spark 1.3 at the same time?
Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see Muse Spark Open and Muse Spark 1.3 answer side by side and keep the better response.
Why choose? Ask both.
Send one prompt to Muse Spark Open and Muse Spark 1.3 at the same time. Compare the answers side by side and keep the best one.