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GPT 5.6 Luna vs Muse Spark 1.1

At a glance
OpenAIGPT 5.6 Luna

OpenAI's fastest, most affordable GPT-5.6 tier for high-volume, latency-sensitive work.

1.1M ctx$1.00/$6.00 per M
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
OpenAIGPT 5.6 Luna
Reasoning
CodingInsufficient data
MathInsufficient data
Sources:Provider·OpenRouter· as of 2026-07-11
Reasoning & Knowledge
Graduate Science92.3%Expert-Level—
Agentic
Terminal Tasks84.7%
MetaMuse Spark 1.1
Reasoning
CodingInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:Provider·OpenRouter· as of 2026-07-16
Cheaper
Reasoning & Knowledge
Graduate Science—Expert-Level52.2%
Agentic
Terminal Tasks80.0%
Specs
OpenAIGPT 5.6 Luna
1.1M
Context
128K
Max output
Jul 2026
Released
MetaMuse Spark 1.1
1.0M
Context
16K
Max output
Jul 2026
Released
Capabilities
OpenAIGPT 5.6 Luna
Vision
Audio
Reasoning
MetaMuse Spark 1.1
Vision
Audio
Reasoning
Pricing
OpenAIGPT 5.6 Luna
Live pricing, shown before you run
Input$1.00/M tokens
Output$6.00/M tokens
Cache read$0.10/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 GPT 5.6 LunaGo to model
Chat with Muse Spark 1.1Go to model
Frequently Asked Questions: GPT 5.6 Luna vs Muse Spark 1.1▼

Which is better, GPT 5.6 Luna or Muse Spark 1.1?

▼

Both GPT 5.6 Luna 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, GPT 5.6 Luna or Muse Spark 1.1?

▼

Muse Spark 1.1 has a lower blended cost. GPT 5.6 Luna: $1.00 input / $6.00 output. Muse Spark 1.1: $1.25 input / $4.25 output.

Which has a larger context window, GPT 5.6 Luna or Muse Spark 1.1?

▼

GPT 5.6 Luna has a larger context window: GPT 5.6 Luna supports 1.1M tokens vs Muse Spark 1.1 at 1M tokens.

Do both GPT 5.6 Luna and Muse Spark 1.1 support vision?

▼

Yes, both GPT 5.6 Luna and Muse Spark 1.1 support vision/image input.

What are the key differences between GPT 5.6 Luna and Muse Spark 1.1?

▼

GPT 5.6 Luna and Muse Spark 1.1 have similar overall capabilities. The main differences lie in pricing, context window size, and provider-specific strengths. Use this comparison page to review all metrics side by side.

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 GPT 5.6 Luna and Muse Spark 1.1 for free on idapt.app to see which performs better for your specific needs.

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