The Known Good Updated 29 Jul 2026
DeepSeek: DeepSeek V3 0324 vs OpenAI: GPT-5 Nano ·DeepSeek vs OpenAI

DeepSeek: DeepSeek V3 0324 vs OpenAI: GPT-5 Nano — head-to-head comparison

DeepSeek: DeepSeek V3 0324 profile OpenAI: GPT-5 Nano profile All comparisons
DeepSeek: DeepSeek V3 0324 — DeepSeek
Quality
#38 of 62
64based on 4 of 7 evaluations
Known Good Index
Speed
#272 of 317
24.6
Output tokens per second
Price
#140 of 370
$0.48
Blended per 1M tokens
In $0.27 · Out $1.12
Cache hit price
#141 of 238
$0.14
per 1M tokens (−50%)
Context
#254 of 375
164k
tokens (~300 pages)
OpenAI: GPT-5 Nano — OpenAI
Quality
#32 of 62
67based on 4 of 7 evaluations
Known Good Index
Speed
#47 of 317
97.5
Output tokens per second
Price
#58 of 370
$0.14
Blended per 1M tokens
In $0.05 · Out $0.40
Cache hit price
#14 of 238
$0.005
per 1M tokens (−90%)
Context
#120 of 375
400k
tokens (~600 pages)
Summary

On the Known Good Index, DeepSeek: DeepSeek V3 0324 scores 64 and OpenAI: GPT-5 Nano scores 67 — a 3-point lead for OpenAI: GPT-5 Nano. They share 3 published evaluations, with DeepSeek: DeepSeek V3 0324 ahead on 0 and OpenAI: GPT-5 Nano ahead on 3.

Blended pricing is $0.48 per 1M tokens for DeepSeek: DeepSeek V3 0324 and $0.14 for OpenAI: GPT-5 Nano — OpenAI: GPT-5 Nano is about 3.5× cheaper.

Throughput is 25 tokens per second for DeepSeek: DeepSeek V3 0324 and 98 for OpenAI: GPT-5 Nano, with time to first token at 1.2s and 2.3s. DeepSeek: DeepSeek V3 0324 accepts 164k tokens of context against 400k.

DeepSeek: DeepSeek V3 0324 is open weights; OpenAI: GPT-5 Nano is proprietary. 6 tracked hosts serve one or both.

Generated from tracked data on 29 Jul 2026 · how these comparisons are computed →

At a glance
MetricDeepSeek: DeepSeek V3 0324OpenAI: GPT-5 Nano
Known Good Index 64 based on 4 of 7 evaluations 67 based on 4 of 7 evaluations
Blended $/1M $0.48 $0.14
Output tok/s 25 98
Context window 164k 400k
Providers 4 2
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Quality

Known Good Index and the capability indices, side by side

Index scores

Each index is min-max normalised across tracked models and scaled 0–100 from published evaluations. We do not run these evaluations.

MetricDeepSeek: DeepSeek V3 0324OpenAI: GPT-5 Nano
Known Good Index 64 67
Mathematics Index 57 89
Reasoning Index 65 —
Agentic Index — 21
Openness Index 100 5
The Known Good

Quality Breakdown

Every evaluation both models report a published score for

Evaluations both models report

Bar = DeepSeek: DeepSeek V3 0324 · marker = OpenAI: GPT-5 Nano · scores ingested from Epoch AI (CC-BY 4.0)

GPQA Diamond68 / 69
Mock AIME 2024–2538 / 81
MATH Level 576 / 95

Right-hand figures read DeepSeek: DeepSeek V3 0324 / OpenAI: GPT-5 Nano. DeepSeek: DeepSeek V3 0324 leads on 0 of 3, OpenAI: GPT-5 Nano on 3.

The Known Good

Arena Elo

Human preference rating from blind pairwise votes

Arena ratings

Elo from blind pairwise votes, ingested from Arena. Higher is better.

MetricDeepSeek: DeepSeek V3 0324OpenAI: GPT-5 Nano
Text Arena 1,375 —
Text Arena (style controlled) 1,395 —
The Known Good

Price & Cost

Published API pricing by token type

Published pricing

USD per 1M tokens. Blended is a 3:1 input:output mix. Live from OpenRouter, cross-checked against models.dev. Lower is better.

MetricDeepSeek: DeepSeek V3 0324OpenAI: GPT-5 Nano
Input $/1M $0.27 $0.05
Output $/1M $1.12 $0.40
Blended $/1M $0.48 $0.14
Cache read $/1M $0.135 $0.005
The Known Good
We publish blended price rather than cost-per-task. Cost-per-task requires token counts from an evaluation suite we do not run. Blended price is computed from published rates and is fully reproducible — see the pricing methodology.

Context Window

Maximum input accepted and maximum output emitted

Context and output limits

Provider-declared limits, from metadata via models.dev and OpenRouter. Higher is better.

MetricDeepSeek: DeepSeek V3 0324OpenAI: GPT-5 Nano
Context window 164k 400k
Max output tokens 66k 128k
The Known Good

Speed & Latency

Median throughput and time to first token across hosting providers

Output speedTime to first token
Throughput and latency

Medians across all tracked providers, derived from OpenRouter endpoint telemetry.

MetricDeepSeek: DeepSeek V3 0324OpenAI: GPT-5 Nano
Output tokens/s 25 98
Time to first token 1.2s 2.3s
The Known Good

Providers

Which hosts serve each model, and at what price and speed

6 hosts
Full provider benchmarks →
Provider DeepSeek: DeepSeek V3 0324 blendedDeepSeek: DeepSeek V3 0324 tok/s OpenAI: GPT-5 Nano blendedOpenAI: GPT-5 Nano tok/s
Crusoe $0.75 33 — —
Novita $0.48 29 — —
DeepInfra $0.41 21 — —
SiliconFlow $0.44 17 — —
OpenAI · first party — — $0.07 186
Azure · first party — — $0.14 58

Per-host pricing and telemetry from OpenRouter. A dash means that host does not serve that model.

The Known Good
Sources for this page
Pricing & providers — OpenRouter Metadata — models.dev Benchmarks — Epoch AI (CC-BY 4.0)Elo — Arena Full attribution →