The Known Good Updated 8 Oct 2026 Subscribe
Google: Gemma 3 27B vs OpenAI: gpt-oss-120b ·Google vs OpenAI

Google: Gemma 3 27B vs OpenAI: gpt-oss-120b — head-to-head comparison

Google: Gemma 3 27B profile OpenAI: gpt-oss-120b profile All comparisons
Google: Gemma 3 27B — Google
Quality
#49 of 65
47based on 4 of 7 evaluations
Known Good Index
Speed
#328 of 356
27.1
Output tokens per second
Price
#85 of 504
$0.17
Blended per 1M tokens
In $0.08 · Out $0.45
Cache hit price
#138 of 384
$0.040
per 1M tokens (−50%)
Context
#448 of 550
131k
tokens (~200 pages)
OpenAI: gpt-oss-120b — OpenAI
Quality
#44 of 65
62based on 3 of 7 evaluations
Known Good Index
Speed
#25 of 356
150.7
Output tokens per second
Price
#24 of 504
$0.07
Blended per 1M tokens
In $0.04 · Out $0.17
Cache hit price
unranked
—
per 1M tokens
Context
#408 of 550
131k
tokens (~200 pages)
Summary

On the Known Good Index, Google: Gemma 3 27B scores 47 and OpenAI: gpt-oss-120b scores 62 — a 15-point lead for OpenAI: gpt-oss-120b. They share 2 published evaluations, with Google: Gemma 3 27B ahead on 0 and OpenAI: gpt-oss-120b ahead on 2.

Blended pricing is $0.17 per 1M tokens for Google: Gemma 3 27B and $0.07 for OpenAI: gpt-oss-120b — OpenAI: gpt-oss-120b is about 2.5× cheaper.

Throughput is 27 tokens per second for Google: Gemma 3 27B and 151 for OpenAI: gpt-oss-120b, with time to first token at 1.5s and 0.8s. Google: Gemma 3 27B accepts 131k tokens of context against 131k.

Google: Gemma 3 27B is open weights under Open weights (restricted use); OpenAI: gpt-oss-120b is open weights under Open weights (unrestricted). 21 tracked hosts serve one or both, and 5 serve both.

Generated from tracked data on 8 Oct 2026 · how these comparisons are computed →

At a glance
MetricGoogle: Gemma 3 27BOpenAI: gpt-oss-120b
Known Good Index 47 based on 4 of 7 evaluations 62 based on 3 of 7 evaluations
Blended $/1M $0.17 $0.07
Output tok/s 27 151
Context window 131k 131k
Providers 6 20
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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.

MetricGoogle: Gemma 3 27BOpenAI: gpt-oss-120b
Known Good Index 47 62
Mathematics Index 49 —
Reasoning Index 40 —
Openness Index 60 60
The Known Good

Quality Breakdown

Every evaluation both models report a published score for

Evaluations both models report

Bar = Google: Gemma 3 27B · marker = OpenAI: gpt-oss-120b · scores ingested from Epoch AI (CC-BY 4.0)

GPQA Diamond48 / 76
Mock AIME 2024–2522 / 89

Right-hand figures read Google: Gemma 3 27B / OpenAI: gpt-oss-120b. Google: Gemma 3 27B leads on 0 of 2, OpenAI: gpt-oss-120b on 2.

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.

MetricGoogle: Gemma 3 27BOpenAI: gpt-oss-120b
Text Arena 1,358 1,365
Text Arena (style controlled) 1,365 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.

MetricGoogle: Gemma 3 27BOpenAI: gpt-oss-120b
Input $/1M $0.08 $0.04
Output $/1M $0.45 $0.17
Blended $/1M $0.17 $0.07
Cache read $/1M $0.040 —
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.

MetricGoogle: Gemma 3 27BOpenAI: gpt-oss-120b
Context window 131k 131k
Max output tokens 118k 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.

MetricGoogle: Gemma 3 27BOpenAI: gpt-oss-120b
Output tokens/s 27 151
Time to first token 1.5s 0.8s
The Known Good

Providers

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

21 hosts · 5 serve both
Full provider benchmarks →
Provider Google: Gemma 3 27B blendedGoogle: Gemma 3 27B tok/s OpenAI: gpt-oss-120b blendedOpenAI: gpt-oss-120b tok/s
Phala $0.23 51 $0.26 116
Nebius $0.15 47 $0.26 259
Novita $0.14 33 $0.10 138
DeepInfra $0.10 23 $0.07 114
Parasail $0.17 17 $0.26 119
NextBit $0.14 16 — —
Cerebras — — $0.45 828
Groq — — $0.26 323
Amazon Bedrock · first party — — $0.26 290
SambaNova — — $0.34 264
Crusoe — — $0.10 190
BaseTen — — $0.20 176
Mara — — $0.30 172
Google · first party — — $0.16 108
Together — — $0.26 88
AkashML — — $0.07 61
DigitalOcean — — $0.15 44
Mancer 2 — — $0.10 43
CoreWeave — — $0.07 37
SiliconFlow — — $0.26 24
DekaLLM — — $0.07 22

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 →