AI model comparison
Muse Spark 1.3 vs Kimi K3
Pricing, context window, benchmarks, and features compared side by side. Or skip the guesswork and send one prompt to both.
Meta
Muse Spark 1.3
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
Moonshot AI
Kimi K3
Kimi K3 is a 2.8T parameter open-weight multimodal reasoning model from Moonshot AI.
- Input / 1M
- $0.80
- Output / 1M
- $10
- Context
- 1.05M
At a glance
Quick verdict
How the two models stack up on the things people ask about most.
Lower price
Muse Spark 1.3
1.4x cheaper for a typical chat
Higher intelligence score
Muse Spark 1.3
48.1 vs 43.6 on Artificial Analysis
Larger context window
Tie
1.05M vs 1.05M tokens
Newer release
Muse Spark 1.3
Released September 2, 2026
Benchmarks
Benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
Coding index
Agentic index
Pricing
Muse Spark 1.3 vs Kimi K3 API pricing
Per-token API rates. Cheaper option highlighted.
| Metric | ||
|---|---|---|
| Input tokensPer 1M tokens | $1.25 | $0.80 |
| Output tokensPer 1M tokens | $4.25 | $10 |
| Cached input (read)Per 1M tokens | $0.15 | $0.55 |
| Cache writePer 1M tokens | Not available | Not available |
| Web searchPer request | $0.0025 | 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 | File, Image, Text, Video | Image, Text, Video |
| Output types | Text | Text |
| Reasoning effort levels | Max, Extra high, High, Medium, Low, Minimal | Max, High, Low |
| Default reasoning effort | Medium | Max |
| Release date | September 2, 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 | Not supported | Supported |
| Deterministic seed | Not 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 1.3 vs Claude Opus 5.5
- Muse Spark 1.3 vs Claude Sonnet 5.5
- Muse Spark 1.3 vs Claude Fable 5.1
- Muse Spark 1.3 vs GPT-6 Astra
- Muse Spark 1.3 vs GPT-6.1 Sol
- Muse Spark 1.3 vs Claude Opus 5
- Muse Spark 1.3 vs Claude Fable 5
- Muse Spark 1.3 vs GPT-6 Sol
- Muse Spark 1.3 vs GPT-5.6 Sol
- Muse Spark 1.3 vs Grok 4.7
- Muse Spark 1.3 vs MiMo-V2.6-Pro
- Muse Spark 1.3 vs Qwen3.8 Max (0902)
- Muse Spark 1.3 vs GLM 5.3
- Muse Spark 1.3 vs Grok 4.6
- Muse Spark 1.3 vs Gemini 3.8 Flash
- Kimi K3 vs DeepSeek V4.1 Flash
- Kimi K3 vs Claude Opus 5.5
- Kimi K3 vs Claude Sonnet 5.5
- Kimi K3 vs Claude Fable 5.1
- Kimi K3 vs GPT-6 Astra
- Kimi K3 vs GPT-6.1 Sol
- Kimi K3 vs Claude Opus 5
- Kimi K3 vs Claude Fable 5
- Kimi K3 vs GLM 5.3
- Kimi K3 vs GPT-6 Sol
- Kimi K3 vs GPT-5.6 Sol
- Kimi K3 vs Grok 4.7
- Kimi K3 vs Qwen3.8 Max (0902)
- Kimi K3 vs Grok 4.6
- Kimi K3 vs Gemini 3.8 Flash
- Kimi K3 vs Claude Haiku 5.5
- Kimi K3 vs GPT-5.6 Terra
- Kimi K3 vs Claude Opus 4.8
- Kimi K3 vs Ling 3.1 Flash
- Kimi K3 vs Claude Opus 4.7
- Kimi K3 vs Qwen3.8 2.4T A95B
- Kimi K3 vs Muse Spark 1.2
- Kimi K3 vs GPT-5.4
- Kimi K3 vs GPT-5.5
- Kimi K3 vs Claude Sonnet 5
Our take
Muse Spark 1.3 is 1.4x cheaper for a typical chat. Muse Spark 1.3 scores higher on the Artificial Analysis Intelligence Index (48.1 vs 43.6). 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 1.3 or Kimi K3 cheaper?
Muse Spark 1.3 is cheaper for a typical chat (2K input tokens and 500 output tokens). Muse Spark 1.3 costs $1.25 per 1M input tokens and $4.25 per 1M output tokens, while Kimi K3 costs $0.80 per 1M input tokens and $10 per 1M output tokens.
Which has a bigger context window, Muse Spark 1.3 or Kimi K3?
Muse Spark 1.3 supports up to 1.05M tokens of context, compared with 1.05M for Kimi K3.
Is Muse Spark 1.3 smarter than Kimi K3?
On the Artificial Analysis Intelligence Index, Muse Spark 1.3 scores 48.1 and Kimi K3 scores 43.6, 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 1.3 and Kimi K3 at the same time?
Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see Muse Spark 1.3 and Kimi K3 answer side by side and keep the better response.
Why choose? Ask both.
Send one prompt to Muse Spark 1.3 and Kimi K3 at the same time. Compare the answers side by side and keep the best one.