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Claude Fable 5 vs Muse Spark 1.1

At a glance
AnthropicClaude Fable 5

Anthropic's Mythos-class flagship for ambitious, long-running professional work.

921M ctx$10.00/$50.00 per M#2/92
MetaMuse Spark 1.1

Meta's multimodal reasoning model built for agentic work and real-world coding.

1.0M ctx$1.25/$4.25 per M
AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
AnthropicClaude Fable 5
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Capability
CapabilityECI91.6
Reasoning & Knowledge
Expert-Level—Factual Recall68.3%
Math
Competition Math99.7%
Agentic
Terminal Tasks—
MetaMuse Spark 1.1
Reasoning
CodingInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:Provider·OpenRouter· as of 2026-07-16
Cheaper
Capability
Capability—
Reasoning & Knowledge
Expert-Level52.2%Factual Recall—
Math
Competition Math—
Agentic
Terminal Tasks80.0%
Specs
AnthropicClaude Fable 5
1M
Context
128K
Max output
Jun 2026
Released
MetaMuse Spark 1.1
1.0M
Context
16K
Max output
Jul 2026
Released
Capabilities
AnthropicClaude Fable 5
Vision
Audio
Reasoning
MetaMuse Spark 1.1
Vision
Audio
Reasoning
Pricing
AnthropicClaude Fable 5
Live pricing, shown before you run
Input$10.00/M tokens
Output$50.00/M tokens
Cache read$1.00/M tokens
Cache write$12.50/M tokens
Web search$0.01/search
MetaMuse Spark 1.1
Live pricing, shown before you run
Input$1.25/M tokens
Output$4.25/M tokens
Cache read$0.15/M tokens
Web search$0.003/search
Chat with Claude Fable 5Go to model
Chat with Muse Spark 1.1Go to model
Frequently Asked Questions: Claude Fable 5 vs Muse Spark 1.1▼

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

▼

Both Claude Fable 5 and Muse Spark 1.1 are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

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

▼

Muse Spark 1.1 has a lower blended cost. Claude Fable 5: $10.00 input / $50.00 output. Muse Spark 1.1: $1.25 input / $4.25 output.

Which has a larger context window, Claude Fable 5 or Muse Spark 1.1?

▼

Muse Spark 1.1 has a larger context window: Claude Fable 5 supports 1M tokens vs Muse Spark 1.1 at 1M tokens.

Do both Claude Fable 5 and Muse Spark 1.1 support vision?

▼

Yes, both Claude Fable 5 and Muse Spark 1.1 support vision/image input.

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

▼

Key differences: Muse Spark 1.1 is significantly cheaper. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Claude Fable 5 and Muse Spark 1.1 for free on idapt.app to see which performs better for your specific needs.

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