LIVE INTELLIGENCE · part of the Xentir AI Index

DeepSeek-V3.2 (Reasoner) vs o4-mini

DeepSeek-V3.2 (Reasoner) OPEN WEIGHTS · DeepSeek, released 2025-12-01
o4-mini · OpenAI, released 2025-04-16

“Epoch AI, 'AI Benchmarking Hub'. Published online at epoch.ai. Retrieved from 'https://epoch.ai/benchmarks' [online resource].” · epoch.ai/benchmarks · Licensed CC BY 4.0 · data last verified 2026-07-29 · Methodology · Data Sources

Head-to-head

Measured on 5 of 9 tracked benchmarks for both models — DeepSeek-V3.2 (Reasoner) leads on 4, o4-mini leads on 1.

Benchmark	DeepSeek-V3.2 (Reasoner)	o4-mini	Leads
Epoch Capabilities Index (ECI)	146.6	146.5	DeepSeek-V3.2 (Reasoner)
SWE-bench Verified	Not measured	Not measured	Not measured on both
GPQA Diamond	0.834	0.796 (high)	DeepSeek-V3.2 (Reasoner)
MATH Level 5	Not measured	0.978 (high)	Not measured on both
OTIS Mock AIME 2024-2025	0.878	0.817 (high)	DeepSeek-V3.2 (Reasoner)
FrontierMath	Not measured	0.248 (high)	Not measured on both
FrontierMath Tier 4	Not measured	0.062 (high)	Not measured on both
SimpleQA Verified	0.275	0.239 (high)	DeepSeek-V3.2 (Reasoner)
Chess Puzzles	0.140	0.260 (high)	o4-mini

Benchmark results measure specific tasks and should not be treated as a universal measure of model quality. A model with no row here for a benchmark has not been measured on it — that is left blank, never estimated.

Reference price

Per 1M tokens	DeepSeek-V3.2 (Reasoner)	o4-mini
Output	—	$4.40

List price as published by the vendor. Xentir does not verify negotiated or enterprise rates, and price is not a measure of capability — see Data Sources.

Full profiles

DeepSeek-V3.2 (Reasoner) → · o4-mini → · the full AI Model Rankings table