AI model comparison
Muse Spark Open vs Kimi K3
Side by side comparison of Muse Spark Open and Kimi K3 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
Kimi K3 is a 2.8T parameter open-weight multimodal reasoning model from Moonshot AI.
- Input / 1M
- $0.28
- Output / 1M
- $9.60
- 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
Muse Spark Open
1.2x cheaper for a typical chat
Higher intelligence score
Muse Spark Open
24.7 vs 17.4 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 Kimi K3 API pricing
Per-token API rates. Cheaper option highlighted.
| Metric | ||
|---|---|---|
| Input tokensPer 1M tokens | $1.25 | $0.28 |
| Output tokensPer 1M tokens | $4.25 | $9.60 |
| Cached input (read)Per 1M tokens | $0.15 | $0.13 |
| Cache writePer 1M tokens | Not available | Not available |
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 | Image, Text, Video |
| Output types | Text | Text |
| Reasoning effort levels | Extra high, High, Medium, Low | Max, High, Low, None |
| Default reasoning effort | Medium | Max |
| Release date | October 15, 2026 | July 16, 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 | Supported |
| Deterministic seed | Supported | 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 Open vs Muse Spark 1.3
- Muse Spark Open vs GLM 5.3
- Muse Spark Open vs Gemini 3.8 Flash
- Muse Spark Open vs DeepSeek V4.1 Flash 1017
- Muse Spark Open vs Step 5 Preview
- Muse Spark Open vs GPT-6 Luna
- Muse Spark Open vs Mistral Large 4
- Muse Spark Open vs DeepSeek V4 Pro 0813
- Muse Spark Open vs Qwen3.8 27B
- Kimi K3 vs Step 5 Preview
- Kimi K3 vs GLM 5.2
- Kimi K3 vs DeepSeek V4 Pro 0813
- Kimi K3 vs Qwen3.8 27B
- Kimi K3 vs MiniMax M3
- Kimi K3 vs Beam 1.0 501B A23B
- Kimi K3 vs Claude Sonnet 5
- Kimi K3 vs Inkling
- Kimi K3 vs Nemotron 3 Ultra
- Kimi K3 vs Gemini 3.5 Flash Lite
- Kimi K3 vs GPT-6 Sol
- Kimi K3 vs Claude Sonnet 4.5
- Kimi K3 vs Claude Sonnet 4.6
- Kimi K3 vs GPT-5.6 Terra
- Kimi K3 vs Grok 4.6
Our take
Muse Spark Open is 1.2x cheaper for a typical chat. Muse Spark Open scores higher on the Artificial Analysis Intelligence Index (24.7 vs 17.4). 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 Kimi K3 cheaper?
Muse Spark Open is cheaper 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, while Kimi K3 costs $0.28 per 1M input tokens and $9.60 per 1M output tokens.
Which has a bigger context window, Muse Spark Open or Kimi K3?
Muse Spark Open supports up to 1.05M tokens of context, compared with 1.05M for Kimi K3.
Is Muse Spark Open smarter than Kimi K3?
On the Artificial Analysis Intelligence Index, Muse Spark Open scores 24.7 and Kimi K3 scores 17.4, putting Muse Spark Open ahead. Benchmarks don't capture everything, so the best test is running your own prompts through both.
Can I use Muse Spark Open and Kimi K3 at the same time?
Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see Muse Spark Open and Kimi K3 answer side by side and keep the better response.
Why choose? Ask both.
Send one prompt to Muse Spark Open and Kimi K3 at the same time. Compare the answers side by side and keep the best one.