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Model Comparison

Claude Fable 5 vs Muse Spark 1.1Which is better in 2026?

Claude Fable 5 significantly outperforms across most benchmarks. Muse Spark 1.1 is 10.0x cheaper per token.

Verdict: Claude Fable 5 vs Muse Spark 1.1 — which is better?

Claude Fable 5 (by Anthropic) and Muse Spark 1.1 (by Meta) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Claude Fable 5 outperforms in 5 benchmarks (DeepSWE 1.1, Humanity's Last Exam, OSWorld-Verified, SWE-Bench Pro, Terminal-Bench 2.1), while Muse Spark 1.1 is better at 1 benchmark (Finance Agent v2). Claude Fable 5 significantly outperforms across most benchmarks.

On price, Muse Spark 1.1 is roughly 10.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Muse Spark 1.1 also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

Choose Claude Fable 5 if…

  • you want the strongest raw capability — it leads on 5 of 6 shared benchmarks

Choose Muse Spark 1.1 if…

  • cost matters — it's about 10.0x cheaper per token
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Jul 2026

Performance Benchmarks

Comparative analysis across standard metrics

6 benchmarks

Claude Fable 5 outperforms in 5 benchmarks (DeepSWE 1.1, Humanity's Last Exam, OSWorld-Verified, SWE-Bench Pro, Terminal-Bench 2.1), while Muse Spark 1.1 is better at 1 benchmark (Finance Agent v2).

Claude Fable 5 significantly outperforms across most benchmarks.

Fri Aug 07 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Muse Spark 1.1 costs less

For input processing, Claude Fable 5 ($10.00/1M tokens) is 8.0x more expensive than Muse Spark 1.1 ($1.25/1M tokens).

For output processing, Claude Fable 5 ($50.00/1M tokens) is 11.8x more expensive than Muse Spark 1.1 ($4.25/1M tokens).

In conclusion, Claude Fable 5 is more expensive than Muse Spark 1.1.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Fri Aug 07 2026 • llm-stats.com
Anthropic
Claude Fable 5
Input tokens$10.00
Output tokens$50.00
Best providerAnthropic
Meta
Muse Spark 1.1
Input tokens$1.25
Output tokens$4.25
Best providerMeta
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Context Window

Maximum input and output token capacity

Muse Spark 1.1 accepts 1,048,576 input tokens compared to Claude Fable 5's 1,000,000 tokens. Muse Spark 1.1 can generate longer responses up to 131,072 tokens, while Claude Fable 5 is limited to 128,000 tokens.

Anthropic
Claude Fable 5
Input1,000,000 tokens
Output128,000 tokens
Meta
Muse Spark 1.1
Input1,048,576 tokens
Output131,072 tokens
Fri Aug 07 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Fable 5 and Muse Spark 1.1 support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Claude Fable 5

Text
Images
Audio
Video

Muse Spark 1.1

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude Fable 5

Proprietary

Closed source

Muse Spark 1.1

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Fable 5 was released on 2026-06-09, while Muse Spark 1.1 was released on 2026-07-09.

Muse Spark 1.1 is 1 month newer than Claude Fable 5.

Claude Fable 5

Jun 9, 2026

1 months ago

Muse Spark 1.1

Jul 9, 2026

4 weeks ago

1mo newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

Claude Fable 5 is available from Anthropic. Muse Spark 1.1 is available from Meta Model API.

Claude Fable 5

anthropic logo
Anthropic
Input Price:Input: $10.00/1MOutput Price:Output: $50.00/1M

Muse Spark 1.1

meta logo
Meta
Input Price:Input: $1.25/1MOutput Price:Output: $4.25/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Anthropic
Higher DeepSWE 1.1 score (70.0% vs 53.0%)
Higher Humanity's Last Exam score (64.5% vs 62.1%)
Higher OSWorld-Verified score (85.0% vs 80.8%)
Higher SWE-Bench Pro score (80.0% vs 61.5%)
Higher Terminal-Bench 2.1 score (84.3% vs 80.0%)
Meta
Larger context window (1,048,576 tokens)
Less expensive input tokens
Less expensive output tokens
Higher Finance Agent v2 score (57.2% vs 56.3%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Claude Fable 5 and Muse Spark 1.1 side-by-side, then vote on the output you prefer.

Claude Fable 5
✓ Preferred
Muse Spark 1.1
Open in Playground
AI Model Comparison Table
Feature
Anthropic
Claude Fable 5
Meta
Muse Spark 1.1

FAQ

Common questions about Claude Fable 5 vs Muse Spark 1.1.

Which is better, Claude Fable 5 or Muse Spark 1.1?

Claude Fable 5 significantly outperforms across most benchmarks. Claude Fable 5 is made by Anthropic and Muse Spark 1.1 is made by Meta. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude Fable 5 compare to Muse Spark 1.1 in benchmarks?

Claude Fable 5 scores SWE-Bench Verified: 95.0%, FrontierSWE: 90.0%, OSWorld-Verified: 85.0%, Terminal-Bench 2.1: 84.3%, SWE-Bench Pro: 80.0%. Muse Spark 1.1 scores CharXiv-R: 88.4%, MCP Atlas: 88.1%, OSWorld-Verified: 80.8%, Terminal-Bench 2.1: 80.0%, BabyVision: 76.3%.

Is Claude Fable 5 cheaper than Muse Spark 1.1?

Muse Spark 1.1 is 8.0x cheaper for input tokens. Claude Fable 5 costs $10.00/M input and $50.00/M output via anthropic. Muse Spark 1.1 costs $1.25/M input and $4.25/M output via meta.

What are the context window sizes for Claude Fable 5 and Muse Spark 1.1?

Claude Fable 5 supports 1.0M tokens and Muse Spark 1.1 supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Fable 5 and Muse Spark 1.1?

Key differences include context window (1.0M vs 1.0M), input pricing ($10.00 vs $1.25/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Fable 5 and Muse Spark 1.1?

Claude Fable 5 is developed by Anthropic and Muse Spark 1.1 is developed by Meta.

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