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GPT-5.1

Models
91

OpenAI's latest frontier model with improved reasoning

Solid performer with strong multimodal capabilities

Metrics

elo1,380
providerOpenAI
price input$5.00
price output$15.00
context window128,000

Score Breakdown

code91
math90
reasoning91
intelligence92

Compatibility

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Scoring Methodology

intelligence30% weight

Overall reasoning and task completion ability

Source: LMArena ELO, Artificial Analysis Intelligence Index, HuggingFace MMLU-PRO

math20% weight

Mathematical reasoning and problem solving

Source: MATH benchmark, GSM8K, HuggingFace MATH-Lvl5

code20% weight

Code generation, understanding, and debugging

Source: HumanEval, MBPP, SWE-bench

reasoning15% weight

Multi-step logical reasoning

Source: ARC-Challenge, BBH, MMLU-Pro, HuggingFace BBH

instruction_following15% weight

Ability to follow complex instructions accurately

Source: HuggingFace IFEval

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95

Data Sources

lmarena.ai
Last updated: December 24, 2025