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Fugu Ultra vs GPT-5.5

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Fugu UltraGPT-5.5
Fugu UltraSakanaGPT-5.5OpenAI · 17 in the news
Scores
Intelligence (ECI)159
Coding91
Math97
Reasoning & Knowledge92
Agentic & Tools87
Specifications
DeveloperSakanaOpenAI
FamilyGPT
ReleasedJun 24, 2026Apr 23, 2026
Parameters
AvailabilityAPI access
Context window1M1.1M
Price — $/M input$5.00$5.00
Price — $/M output$30.00$30.00
Inputstext, imagefile, image, text
Outputstexttext
Benchmarks
AIME 2024/2025100%
APEX38%
ARC-AGI95%
ARC-AGI-285%
FrontierMath52%
FrontierMath Tier 435%
GPQA Diamond94%
GSO (code optimization)40%
Humanity's Last Exam44%
SciCode56%
SimpleBench69%
SimpleQA Verified63%
SWE-bench Verified81%
Terminal-Bench85%
WebDev Arena1505
WeirdML85%
τ²-bench94%

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.