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GPT-5.6 Luna vs Muse Spark

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GPT-5.6 LunaMuse Spark
AttributeGPT-5.6 LunaOpenAIMuse SparkMeta AI
Scores
Intelligence (ECI)154
Coding8482
Math68
Reasoning & Knowledge8384
Agentic & Tools62
Specifications
DeveloperOpenAIMeta AI
FamilyGPT
ReleasedJul 9, 2026Apr 8, 2026
Parameters
AvailabilityAPI access
Context window1.1M
Price — $/M input$1.00
Price — $/M output$6.00
Inputsfile, image, text
Outputstext
Benchmarks
GPQA Diamond91%90%
Humanity's Last Exam37%41%
SciCode53%52%
AIME 2024/202589%
FrontierMath39%
FrontierMath Tier 415%
SimpleQA Verified66%
WebDev Arena1513
τ²-bench92%

Use-case scores are 0–100 percentile composites across each area’s benchmarks, ranked against every model from the past year. Highlighted cells lead each row. Open a model for the full picture.

Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.