GLM 5.3 Flash vs Muse Spark 1.3
API pricing, context window and capabilities for GLM 5.3 Flash 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 numbersGLM 5.3 Flash wins on price. Muse Spark 1.3 wins on intelligence.
Price
GLM 5.3 Flash
Terminal-Bench
Tied
Intelligence
Muse Spark 1.3
Context window
Tied
Key takeaways
who wins on what, from the published numbersGLM 5.3 Flash wins
- Cheaper input ($0.11 vs $1.25 /1M)
- Cheaper output ($0.35 vs $4.25 /1M)
- Higher max output (1M vs 131K)
- More serving providers (13 vs 4)
Muse Spark 1.3 wins
- Has web search
Cheaper overall
GLM 5.3 Flash
$0.11 + $0.35 /1M
Larger context
Tied
More providers
GLM 5.3 Flash
13 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.
| GLM 5.3 Flash | Muse Spark 1.3 | |
|---|---|---|
| Input $/1M | $0.11via Sail best | $1.25via Azure |
| Output $/1M | $0.35via Sail best | $4.25via Azure |
| Context window | 1M | 1M |
| Max output | 1M best | 131K |
| Serving providers | 13 best | 4 |
| Date | Released Aug 26, 2026 | Released Sep 2, 2026 |
Benchmarks
Benchmark scores, side by side| GLM 5.3 Flash | Muse Spark 1.3 | |
|---|---|---|
| Intelligence | 41.8 | 48.1 best |
| Terminal-Bench | 84% | 84% |
| GPQA Diamond | 91% | 94% best |
| Output speed | 67 t/s | 128 t/s best |
| Latency (TTFT) | 2.80s best | 41.69s |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
GLM 5.3 Flash
via Sail
$0.90
Muse Spark 1.3
via Meta
$11
Capabilities
feature support, side by side| Feature | GLM 5.3 Flash | Muse Spark 1.3 |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | — | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | — | ✓ |
Related comparisons
Frequently asked questions
Which is cheaper, GLM 5.3 Flash or Muse Spark 1.3?
GLM 5.3 Flash is cheaper for input ($0.11 vs $1.25 per 1M tokens) from Sail. GLM 5.3 Flash is cheaper for output ($0.35 vs $4.25 per 1M tokens) from Sail.
What is the context window difference between GLM 5.3 Flash and Muse Spark 1.3?
Both GLM 5.3 Flash and Muse Spark 1.3 have about a 1M-token context window.
How do GLM 5.3 Flash and Muse Spark 1.3 compare on benchmarks?
On the tracked benchmarks, they score about the same 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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