LLM Comparison

GPT-5.6 Luna vs Muse Spark 1.1

Side-by-side specs, pricing & capabilities · Updated September 2026

Price vs Intelligence

7063564942$0.49$1.26$2.03$2.80$3.58Avg Price per M tokensIntelligenceGPT-5.6 Luna52.3 / $0.70Muse Spark 1.160.4 / $2.75

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2/6 models
Same tier:
 OpenAIGPT-5.6 LunaMetaMuse Spark 1.1
OrganizationOpenAIOpenAIMetaMeta
OpenTools Score
52
74.7
60
22.0
FamilyGPT-5.6Muse Spark
StatusCurrentCurrent
Release DateJul 2026Jul 2026
Context Window1.1M tokens1.0M tokens
Input Price$0.20/M tokens$1.25/M tokens
Output Price$1.20/M tokens$4.25/M tokens
Pricing NotesOpenAI pricing page lists $1 input and $6 output per 1M tokens, plus GPT-5.6 cache-write and cache-read pricing.Artificial Analysis reports Meta API pricing at $1.25 input, $4.25 output, and $0.15 cached input per 1M tokens for the xhigh variant.
Capabilities
textvisionreasoningcodingtool-useweb-searchfile-searchcomputer-useagents
reasoningtool-usecomputer-usecodingmultimodallong-contextstructured-output
Training CutoffFeb 16, 2026—
Max Output128K tokens131K tokens
API Identifiergpt-5.6-lunamuse-spark-1.1
Benchmarks
Artificial Analysis Intelligence Index
51artificial-analysis
—
Artificial Analysis Coding Agent Index
74.6artificial-analysis
—
Artificial Analysis Intelligence Index v4.3
37.5048artificial-analysis
34https://artificialanalysis.ai/models/muse-spark-1-1/
GPQA Diamond
91.1111artificial-analysis
89.798artificial-analysis
SciCode
53.588artificial-analysis
58.7963artificial-analysis
Terminal-Bench 2.1
80.8989artificial-analysis
77.9026artificial-analysis
Artificial Analysis Intelligence Index v4.1—
51artificial-analysis
 View GPT-5.6 LunaView Muse Spark 1.1

Cost Calculator

Enter your expected monthly token usage to compare costs.

ModelInputOutputTotal / movs Best
GPT-5.6 LunaCheapest$0.20$0.60$0.80—
Muse Spark 1.1$1.25$2.13$3.38+322%

OpenAI

GPT-5.6 Luna

GPT-5.6 Luna is OpenAI lower-cost GPT-5.6 model for high-volume reasoning, coding, and agentic workloads. OpenAI model docs list the same 1.05M token context window, 128K max output, and major tool support as the larger GPT-5.6 variants.

Meta

Muse Spark 1.1

Muse Spark 1.1 is Meta's multimodal reasoning model for agentic coding, computer-use workflows, tool calling, and long-context tasks through the Meta Model API.

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