Claude Opus 5 vs Muse Spark 1.3
API pricing, context window and capabilities for Claude Opus 5 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 numbersClaude Opus 5 wins on Terminal-Bench and on intelligence. Muse Spark 1.3 wins on price.
Price
Muse Spark 1.3
Terminal-Bench
Claude Opus 5
Intelligence
Claude Opus 5
Context window
Tied
Key takeaways
who wins on what, from the published numbersClaude Opus 5 wins
- More serving providers (9 vs 4)
Muse Spark 1.3 wins
- Cheaper input ($5.00 vs $1.25 /1M)
- Cheaper output ($25.00 vs $4.25 /1M)
- Higher max output (128K vs 131K)
Cheaper overall
Muse Spark 1.3
$1.25 + $4.25 /1M
Larger context
Tied
More providers
Claude Opus 5
9 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.
| Claude Opus 5 | Muse Spark 1.3 | |
|---|---|---|
| Input $/1M | $5.00via Anthropic | $1.25via Azure best |
| Output $/1M | $25.00via Anthropic | $4.25via Azure best |
| Context window | 1M | 1M |
| Max output | 128K | 131K best |
| Serving providers | 9 best | 4 |
| Date | Released Jul 24, 2026 | Released Sep 2, 2026 |
Benchmarks
Benchmark scores, side by side| Claude Opus 5 | Muse Spark 1.3 | |
|---|---|---|
| Intelligence | 50.8 best | 48.1 |
| Terminal-Bench | 89% best | 84% |
| GPQA Diamond | 93% | 94% best |
| Output speed | 56 t/s | 128 t/s best |
| Latency (TTFT) | 107.27s | 41.69s best |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
Claude Opus 5
via OpenRouter
$50
Muse Spark 1.3
via Meta
$11
Capabilities
feature support, side by side| Feature | Claude Opus 5 | Muse Spark 1.3 |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | — | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | ✓ | ✓ |
Related comparisons
Frequently asked questions
Which is cheaper, Claude Opus 5 or Muse Spark 1.3?
Muse Spark 1.3 is cheaper for input ($5.00 vs $1.25 per 1M tokens) from Azure. Muse Spark 1.3 is cheaper for output ($25.00 vs $4.25 per 1M tokens) from Azure.
What is the context window difference between Claude Opus 5 and Muse Spark 1.3?
Both Claude Opus 5 and Muse Spark 1.3 have about a 1M-token context window.
How do Claude Opus 5 and Muse Spark 1.3 compare on benchmarks?
On the tracked benchmarks, Claude Opus 5 leads on Terminal-Bench, and Claude Opus 5 leads on intelligence.
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Sep 28, 2026
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