Claude Fable 5.1 vs Muse Spark 1.3
API pricing, context window and capabilities for Claude Fable 5.1 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 Fable 5.1 wins on Terminal-Bench and on intelligence. Muse Spark 1.3 wins on price.
Price
Muse Spark 1.3
Terminal-Bench
Claude Fable 5.1
Intelligence
Claude Fable 5.1
Context window
Tied
Key takeaways
who wins on what, from the published numbersClaude Fable 5.1 wins
- More serving providers (7 vs 4)
Muse Spark 1.3 wins
- Cheaper input ($10.00 vs $1.25 /1M)
- Cheaper output ($50.00 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 Fable 5.1
7 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 Fable 5.1 | Muse Spark 1.3 | |
|---|---|---|
| Input $/1M | $10.00via Anthropic | $1.25via Azure best |
| Output $/1M | $50.00via Anthropic | $4.25via Azure best |
| Context window | 1M | 1M |
| Max output | 128K | 131K best |
| Serving providers | 7 best | 4 |
| Date | Released Sep 1, 2026 | Released Sep 2, 2026 |
Benchmarks
Benchmark scores, side by side| Claude Fable 5.1 | Muse Spark 1.3 | |
|---|---|---|
| Intelligence | 53.4 best | 48.1 |
| Terminal-Bench | 91% best | 84% |
| GPQA Diamond | 94% | 94% |
| Output speed | 71 t/s | 128 t/s best |
| Latency (TTFT) | 249.68s | 41.69s best |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
Claude Fable 5.1
via Amazon Bedrock
$100
Muse Spark 1.3
via Meta
$11
Capabilities
feature support, side by side| Feature | Claude Fable 5.1 | Muse Spark 1.3 |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | — | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | ✓ | ✓ |
Related comparisons
Frequently asked questions
Which is cheaper, Claude Fable 5.1 or Muse Spark 1.3?
Muse Spark 1.3 is cheaper for input ($10.00 vs $1.25 per 1M tokens) from Azure. Muse Spark 1.3 is cheaper for output ($50.00 vs $4.25 per 1M tokens) from Azure.
What is the context window difference between Claude Fable 5.1 and Muse Spark 1.3?
Both Claude Fable 5.1 and Muse Spark 1.3 have about a 1M-token context window.
How do Claude Fable 5.1 and Muse Spark 1.3 compare on benchmarks?
On the tracked benchmarks, Claude Fable 5.1 leads on Terminal-Bench, and Claude Fable 5.1 leads on intelligence.
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Sep 28, 2026
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