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How smart is DeepSeek-R1 (May 2025)?

104 SI-IQ · 90% interval 100–109
Not ranked: results from fewer than 5 benchmarks

DeepSeek-R1 (May 2025) is a model from DeepSeek, released on May 28, 2025. Its SI-IQ is 104 (90% interval 100–109), estimated from 5 benchmark results by 2 evaluators.

Data as of Oct 18, 2026 · method 1.0.0

A model is ranked when its results come from at least 5 benchmarks (the two GPQA Diamond runs count as one) in at least 3 areas, from at least 2 different evaluators, and its versions are released no more than 60 days apart. This model does not meet that yet (results from fewer than 5 benchmarks). Its provisional estimate rests on 5 benchmark results and can change a lot when more results arrive.

Facts

Developer: DeepSeek
Released: May 28, 2025
Access: Open weights (restricted licence)
Benchmarks used: 5 benchmark results from 2 evaluators

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
MATH Level 5	Math	96.6%	109	Epoch AI	`DeepSeek-R1-0528`	Oct 18, 2026	Epoch AI Benchmarking Hub · data file
OTIS Mock AIME 2024–2025	Math	66.4%	100	Epoch AI	`DeepSeek-R1-0528`	Oct 18, 2026	Epoch AI Benchmarking Hub · data file
GPQA Diamond	Knowledge	76.3%	102	Epoch AI	`DeepSeek-R1-0528`	Oct 18, 2026	Epoch AI Benchmarking Hub · data file
GPQA Diamond (OpenRouter run)	Knowledge	78.5%	109	OpenRouter	`deepseek/deepseek-r1-0528` StreamLake · median over providers (3 of 3 rows)	Oct 18, 2026	OpenRouter benchmark datasets · data file
τ²-bench Airline (OpenRouter run)	Agents	47.9%	86	OpenRouter	`deepseek/deepseek-r1-0528` SiliconFlow · median over providers (2 of 2 rows), lower median	Oct 18, 2026	OpenRouter benchmark datasets · data file

Human preference (Arena)

On the Arena leaderboard, where people vote between two anonymous answers, DeepSeek-R1 (May 2025) has a rating of 1,421 (1,416–1,427) from 18,167 votes (published Oct 15, 2026). Human preference is a different measure from benchmark ability and is not part of SI-IQ. Arena (Hugging Face)

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

Data sources: Arena leaderboard dataset on Hugging Face (CC BY 4.0); Epoch AI, ‘Capabilities & benchmarking’ (CC BY 4.0); Source: OpenRouter (openrouter.ai), licensed under CC BY 4.0: reuse and republish with attribution to OpenRouter (licences and changes).