Kimi K3 vs Muse Spark 1.3
API pricing, context window and capabilities for Kimi K3 and Muse Spark 1.3, side by side. Prices are the cheapest listed serving route per 1M tokens, from LiteLLM and OpenRouter.
Verdict
computed from the published numbersKimi K3 wins on Terminal-Bench. Muse Spark 1.3 wins on intelligence.
Price
Tied
Terminal-Bench
Kimi K3
Intelligence
Muse Spark 1.3
Context window
Tied
Key takeaways
who wins on what, from the published numbersKimi K3 wins
- Cheaper input ($0.70 vs $1.25 /1M)
- Higher max output (1M vs 131K)
- More serving providers (14 vs 4)
Muse Spark 1.3 wins
- Cheaper output ($12.50 vs $4.25 /1M)
- Has web search
Cheaper overall
Muse Spark 1.3
$1.25 + $4.25 /1M
Larger context
Tied
More providers
Kimi K3
14 providers
Pricing & specs
cheapest listed route · per 1M tokensOn-demand listed rates, OpenRouter routed quotes and Vercel reseller quotes. Enterprise commitments can be materially lower. An OpenRouter routed quote is the price of whichever upstream provider OpenRouter prefers today, so it moves day to day.
| Kimi K3 | Muse Spark 1.3 | |
|---|---|---|
| Input $/1M | $0.70OpenRouter routed quote best | $1.25via Azure |
| Output $/1M | $12.50via Sail | $4.25via Azure best |
| Context window | 1M | 1M |
| Max output | 1M best | 131K |
| Serving providers | 14 best | 4 |
| Date | Released Jul 16, 2026 | Released Sep 2, 2026 |
Benchmarks
Benchmark scores, side by side| Kimi K3 | Muse Spark 1.3 | |
|---|---|---|
| Intelligence | 43.6 | 48.1 best |
| Terminal-Bench | 85% best | 84% |
| GPQA Diamond | 94% | 94% |
| Output speed | 45 t/s | 128 t/s best |
| Latency (TTFT) | 3.17s best | 41.69s |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
Kimi K3
via OpenRouter
$19
Muse Spark 1.3
via Meta
$11
Capabilities
feature support, side by side| Feature | Kimi K3 | Muse Spark 1.3 |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | — | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | — | ✓ |
Related comparisons
Frequently asked questions
Which is cheaper, Kimi K3 or Muse Spark 1.3?
Kimi K3 is cheaper for input ($0.70 vs $1.25 per 1M tokens) as an OpenRouter routed quote, while Moonshot lists it at $3.00 per 1M input. Muse Spark 1.3 is cheaper for output ($12.50 vs $4.25 per 1M tokens) from Azure.
What is the context window difference between Kimi K3 and Muse Spark 1.3?
Both Kimi K3 and Muse Spark 1.3 have about a 1M-token context window.
How do Kimi K3 and Muse Spark 1.3 compare on benchmarks?
On the tracked benchmarks, Kimi K3 leads on Terminal-Bench, and Muse Spark 1.3 leads on intelligence.
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Sep 28, 2026
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