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How smart is GPT-4.1?

91 SI-IQ · 90% interval 87–94
Rank 73 of 80 ranked models · Plausible rank range 69–73

GPT-4.1 is a model from OpenAI, released on Apr 14, 2025. Its SI-IQ is 91 (90% interval 87–94), estimated from 11 benchmark results by 4 evaluators. Its strongest area is Agents and its weakest is Math.

Data as of Oct 18, 2026 · method 1.0.0

Facts

Developer: OpenAI
Released: Apr 14, 2025
Access: API access
Benchmarks used: 11 benchmark results from 4 evaluators
API price: $2.00 input / $8.00 output per 1M tokens (developer's price list, Oct 18, 2026)
Context window: 1,047,576 tokens

Ability by area (SI-IQ, 90% interval)

Every benchmark result we used

Each score is one value exactly as the source published it: for Epoch AI the best of its run settings, for OpenRouter the median hosting provider (the developer's own hosting when it ran the test). “Implied SI-IQ” is the ability that this single result points to; the overall SI-IQ is their precision-weighted average.

Benchmark	Area	Score	Implied SI-IQ	Evaluated by	As listed by the source	Retrieved	Source
Chess Puzzles	Reasoning	3.0%	61	Epoch AI	`gpt-4.1-2025-04-14`	Oct 18, 2026	Epoch AI Benchmarking Hub · data file
FrontierMath Tiers 1–3	Math	6.0%	92	Epoch AI	`gpt-4.1-2025-04-14`	Oct 18, 2026	Epoch AI Benchmarking Hub · data file
MATH Level 5	Math	83.0%	88	Epoch AI	`gpt-4.1-2025-04-14`	Oct 18, 2026	Epoch AI Benchmarking Hub · data file
OTIS Mock AIME 2024–2025	Math	38.3%	88	Epoch AI	`gpt-4.1-2025-04-14`	Oct 18, 2026	Epoch AI Benchmarking Hub · data file
Aider Polyglot	Coding	52.4%	97	Aider	`gpt-4.1`	Oct 18, 2026	Aider LLM Leaderboards · data file
SWE-bench Verified (Epoch AI run)	Coding	48.5%	84	Epoch AI	`gpt-4.1-2025-04-14`	Oct 18, 2026	Epoch AI Benchmarking Hub · data file
GPQA Diamond	Knowledge	66.9%	92	Epoch AI	`gpt-4.1-2025-04-14`	Oct 18, 2026	Epoch AI Benchmarking Hub · data file
GPQA Diamond (OpenRouter run)	Knowledge	66.1%	93	OpenRouter	`openai/gpt-4.1-2025-04-14` OpenAI · first-party provider (1 of 2 rows)	Oct 18, 2026	OpenRouter benchmark datasets · data file
SimpleQA Verified	Knowledge	31.1%	110	Epoch AI	`gpt-4.1-2025-04-14`	Oct 18, 2026	Epoch AI Benchmarking Hub · data file
Berkeley Function Calling Leaderboard	Agents	54.0%	102	UC Berkeley (Gorilla)	`GPT-4.1-2025-04-14 (FC)`	Oct 18, 2026	Berkeley Function Calling Leaderboard · data file
τ²-bench Airline (OpenRouter run)	Agents	50.8%	90	OpenRouter	`openai/gpt-4.1-2025-04-14` OpenAI · first-party provider (1 of 3 rows)	Oct 18, 2026	OpenRouter benchmark datasets · data file

Human preference (Arena)

On the Arena leaderboard, where people vote between two anonymous answers, GPT-4.1 has a rating of 1,415 (1,411–1,418) from 50,312 votes (published Oct 15, 2026). Human preference is a different measure from benchmark ability and is not part of SI-IQ. Arena (Hugging Face)

Models with similar SI-IQ

Model	SI-IQ
GPT-4.1 miniOpenAI	91	GPT-4.1 vs GPT-4.1 mini
Qwen3-32BAlibaba	95	GPT-4.1 vs Qwen3-32B
Claude Sonnet 4Anthropic	97	GPT-4.1 vs Claude Sonnet 4
Claude Opus 4Anthropic	98	GPT-4.1 vs Claude Opus 4
Claude 3.7 SonnetAnthropic	99	GPT-4.1 vs Claude 3.7 Sonnet

Computed with SI-IQ method version 1.0.0. Read the full methodology

Data sources: Aider polyglot leaderboard data (Apache-2.0); Arena leaderboard dataset on Hugging Face (CC BY 4.0); Berkeley Function Calling Leaderboard, Gorilla project (Apache-2.0); Epoch AI, ‘Capabilities & benchmarking’ (CC BY 4.0); LiteLLM, model_prices_and_context_window.json (MIT); Source: OpenRouter (openrouter.ai), licensed under CC BY 4.0: reuse and republish with attribution to OpenRouter (licences and changes).