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EXAONE 4.5 vs GPT-5.5
EXAONE 4.5 (LG AI Research) and GPT-5.5 (OpenAI) compared on benchmarks, pricing, context window, and use-case rankings.
Scores
Intelligence (ECI)—159
Coding—90
Math—97
Reasoning & Knowledge—91
Agentic & Tools—95
Specifications
DeveloperLG AI ResearchOpenAI
Family—GPT
ReleasedApr 9, 2026Apr 23, 2026
Parameters33.2B—
AvailabilityOpen weights (restricted use)API access
Context window—1.1M
Price — $/M input—$5.00
Price — $/M output—$30.00
Inputs—file, image, text
Outputs—text
Benchmarks
AIME 2024/2025—100%
APEX—38%
ARC-AGI—95%
ARC-AGI-2—85%
FrontierMath—52%
FrontierMath Tier 4—35%
GPQA Diamond—94%
GSO (code optimization)—40%
SimpleBench—69%
SimpleQA Verified—63%
SWE-bench Verified—81%
Terminal-Bench—85%
WebDev Arena—1505
WeirdML—85%
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.
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Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.