The Known Good Updated 4 Sep 2026 Subscribe
DeepSeek: DeepSeek V4 Pro 0423 vs OpenAI: gpt-oss-120b ·DeepSeek vs OpenAI

DeepSeek: DeepSeek V4 Pro 0423 vs OpenAI: gpt-oss-120b — head-to-head comparison

DeepSeek: DeepSeek V4 Pro 0423 profile OpenAI: gpt-oss-120b profile All comparisons
DeepSeek: DeepSeek V4 Pro 0423 — DeepSeek
Quality
#4 of 65
93based on 3 of 7 evaluations
Known Good Index
Speed
#201 of 338
42.2
Output tokens per second
Price
#263 of 442
$1.30
Blended per 1M tokens
In $1.04 · Out $2.08
Cache hit price
#151 of 324
$0.087
per 1M tokens (−92%)
Context
#43 of 476
1.05M
tokens (~1,600 pages)
OpenAI: gpt-oss-120b — OpenAI
Quality
#44 of 65
62based on 3 of 7 evaluations
Known Good Index
Speed
#9 of 338
166.7
Output tokens per second
Price
#19 of 442
$0.07
Blended per 1M tokens
In $0.04 · Out $0.17
Cache hit price
unranked
per 1M tokens
Context
#363 of 476
131k
tokens (~200 pages)
Summary

On the Known Good Index, DeepSeek: DeepSeek V4 Pro 0423 scores 93 and OpenAI: gpt-oss-120b scores 62 — a 32-point lead for DeepSeek: DeepSeek V4 Pro 0423. They share 2 published evaluations, with DeepSeek: DeepSeek V4 Pro 0423 ahead on 2 and OpenAI: gpt-oss-120b ahead on 0.

Blended pricing is $1.30 per 1M tokens for DeepSeek: DeepSeek V4 Pro 0423 and $0.07 for OpenAI: gpt-oss-120b — OpenAI: gpt-oss-120b is about 18.5× cheaper.

Throughput is 42 tokens per second for DeepSeek: DeepSeek V4 Pro 0423 and 167 for OpenAI: gpt-oss-120b, with time to first token at 1.5s and 0.6s. DeepSeek: DeepSeek V4 Pro 0423 accepts 1.05M tokens of context against 131k.

DeepSeek: DeepSeek V4 Pro 0423 is open weights under Open weights (unrestricted); OpenAI: gpt-oss-120b is open weights under Open weights (unrestricted). 31 tracked hosts serve one or both, and 8 serve both.

Generated from tracked data on 4 Sep 2026 · how these comparisons are computed →

At a glance
MetricDeepSeek: DeepSeek V4 Pro 0423OpenAI: gpt-oss-120b
Known Good Index 93 based on 3 of 7 evaluations 62 based on 3 of 7 evaluations
Blended $/1M $1.30 $0.07
Output tok/s 42 167
Context window 1.05M 131k
Providers 21 18
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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 V4 Pro 0423OpenAI: gpt-oss-120b
Known Good Index 93 62
Openness Index 60 60
The Known Good

Quality Breakdown

Every evaluation both models report a published score for

Evaluations both models report

Bar = DeepSeek: DeepSeek V4 Pro 0423 · marker = OpenAI: gpt-oss-120b · scores ingested from Epoch AI (CC-BY 4.0)

GPQA Diamond91 / 76
Mock AIME 2024–2597 / 89

Right-hand figures read DeepSeek: DeepSeek V4 Pro 0423 / OpenAI: gpt-oss-120b. DeepSeek: DeepSeek V4 Pro 0423 leads on 2 of 2, OpenAI: gpt-oss-120b on 0.

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 V4 Pro 0423OpenAI: gpt-oss-120b
Text Arena 1,451 1,366
Text Arena (style controlled) 1,458 1,352
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 V4 Pro 0423OpenAI: gpt-oss-120b
Input $/1M $1.04 $0.04
Output $/1M $2.08 $0.17
Blended $/1M $1.30 $0.07
Cache read $/1M $0.087
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 V4 Pro 0423OpenAI: gpt-oss-120b
Context window 1.05M 131k
Max output tokens 384k 118k
The Known Good

Speed & Latency

Mean throughput and time to first token across hosting providers, over successful measurements from the last 48 hours

Throughput and latency

Means across all tracked providers over successful measurements from the last 48 hours, derived from OpenRouter endpoint telemetry.

MetricDeepSeek: DeepSeek V4 Pro 0423OpenAI: gpt-oss-120b
Output tokens/s 42 167
Time to first token 1.5s 0.6s
The Known Good

Providers

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

31 hosts · 8 serve both
Full provider benchmarks →
Provider DeepSeek: DeepSeek V4 Pro 0423 blendedDeepSeek: DeepSeek V4 Pro 0423 tok/s OpenAI: gpt-oss-120b blendedOpenAI: gpt-oss-120b tok/s
BaseTen $2.17 66 $0.20 187
CoreWeave $1.50 62 $0.07 57
Novita $2.00 58 $0.10 102
Azure · first party $2.39 57
Alibaba · first party $1.77 54
Parasail $2.17 52 $0.26 107
NextBit $2.15 49
Venice $2.06 49
Baidu · first party $2.11 48
AtlasCloud $2.10 43
DeepInfra $1.62 43 $0.07 130
Together $2.17 39 $0.26 60
SiliconFlow $1.91 34 $0.15 18
DeepSeek · first party $0.99 31
GMICloud $1.30 31
StreamLake $1.30 30
DigitalOcean $1.09 28 $0.14 27
Wafer $1.50 28
Ionstream $1.41 26
Cloudflare $1.50 12
Fireworks $1.20
Cerebras $0.45 788
Groq $0.26 344
Amazon Bedrock · first party $0.26 330
SambaNova $0.34 319
Nebius $0.26 247
Mara $0.30 150
Google · first party $0.16 142
Mancer 2 $0.17 95
Phala $0.26 85
AkashML $0.07 43

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 →