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Mercury 2.5 vs Muse Spark 1.3

At a glance

Inception's latest diffusion LLM and the fastest reasoning model available, producing and refining tokens in parallel instead of one at a time.

260K ctx$0.04/$0.15 per M

Meta's latest multimodal reasoning model for long-running agentic, multi-agent, and coding workflows.

1.0M ctx$1.25/$4.25 per M
Demos
All demos

No shared demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Cheaper97%
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Specs
260K
Context
66K
Max output
Sep 2026
Released
1.0M
Context
256K
Max output
Sep 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input97%$0.04/M tokens
Output96%$0.15/M tokens
Cache read97%$0.004/M tokens
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 Mercury 2.5Go to model
Chat with Muse Spark 1.3Go to model
Frequently Asked Questions: Mercury 2.5 vs Muse Spark 1.3▼

Which is better, Mercury 2.5 or Muse Spark 1.3?

▼

Both Mercury 2.5 and Muse Spark 1.3 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, Mercury 2.5 or Muse Spark 1.3?

▼

Mercury 2.5 has a lower blended cost. Mercury 2.5: $0.04 input / $0.15 output. Muse Spark 1.3: $1.25 input / $4.25 output.

Which has a larger context window, Mercury 2.5 or Muse Spark 1.3?

▼

Muse Spark 1.3 has a larger context window: Mercury 2.5 supports 260K tokens vs Muse Spark 1.3 at 1M tokens.

Do both Mercury 2.5 and Muse Spark 1.3 support vision?

▼

Muse Spark 1.3 supports vision/image input, but Mercury 2.5 does not.

What are the key differences between Mercury 2.5 and Muse Spark 1.3?

▼

Key differences: Mercury 2.5 is significantly cheaper; only Muse Spark 1.3 supports vision input. 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 Mercury 2.5 and Muse Spark 1.3 for free on idapt.app to see which performs better for your specific needs.

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