The Known Good Updated 29 Jul 2026
Google: Gemma 3 27B vs OpenAI: GPT-5.2 ·Google vs OpenAI

Google: Gemma 3 27B vs OpenAI: GPT-5.2 — head-to-head comparison

Google: Gemma 3 27B profile OpenAI: GPT-5.2 profile All comparisons
Google: Gemma 3 27B — Google
Quality
#46 of 62
46based on 4 of 7 evaluations
Known Good Index
Speed
#278 of 317
20.9
Output tokens per second
Price
#66 of 370
$0.17
Blended per 1M tokens
In $0.08 · Out $0.45
Cache hit price
#74 of 238
$0.040
per 1M tokens (−50%)
Context
#198 of 375
262k
tokens (~400 pages)
OpenAI: GPT-5.2 — OpenAI
Quality
#16 of 62
80based on 5 of 7 evaluations
Known Good Index
Speed
#134 of 317
55.1
Output tokens per second
Price
#319 of 370
$4.81
Blended per 1M tokens
In $1.75 · Out $14.00
Cache hit price
#160 of 238
$0.17
per 1M tokens (−90%)
Context
#129 of 375
400k
tokens (~600 pages)
Summary

On the Known Good Index, Google: Gemma 3 27B scores 46 and OpenAI: GPT-5.2 scores 80 — a 34-point lead for OpenAI: GPT-5.2. They share 2 published evaluations, with Google: Gemma 3 27B ahead on 0 and OpenAI: GPT-5.2 ahead on 2.

Blended pricing is $0.17 per 1M tokens for Google: Gemma 3 27B and $4.81 for OpenAI: GPT-5.2 — Google: Gemma 3 27B is about 27.9× cheaper.

Throughput is 21 tokens per second for Google: Gemma 3 27B and 55 for OpenAI: GPT-5.2, with time to first token at 1.1s and 3.5s. Google: Gemma 3 27B accepts 262k tokens of context against 400k.

Google: Gemma 3 27B is open weights under Open weights (restricted use); OpenAI: GPT-5.2 is proprietary. 7 tracked hosts serve one or both.

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

At a glance
MetricGoogle: Gemma 3 27BOpenAI: GPT-5.2
Known Good Index 46 based on 4 of 7 evaluations 80 based on 5 of 7 evaluations
Blended $/1M $0.17 $4.81
Output tok/s 21 55
Context window 262k 400k
Providers 5 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.

MetricGoogle: Gemma 3 27BOpenAI: GPT-5.2
Known Good Index 46 80
Coding Index — 76
Mathematics Index 47 96
Reasoning Index 40 77
Agentic Index — 76
Openness Index 60 5
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-5.2 · scores ingested from Epoch AI (CC-BY 4.0)

GPQA Diamond49 / 91
Mock AIME 2024–2520 / 96

Right-hand figures read Google: Gemma 3 27B / OpenAI: GPT-5.2. Google: Gemma 3 27B leads on 0 of 2, OpenAI: GPT-5.2 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-5.2
Text Arena — 1,412
Text Arena (style controlled) — 1,435
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-5.2
Input $/1M $0.08 $1.75
Output $/1M $0.45 $14.00
Blended $/1M $0.17 $4.81
Cache read $/1M $0.040 $0.175
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-5.2
Context window 262k 400k
Max output tokens 131k 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.

MetricGoogle: Gemma 3 27BOpenAI: GPT-5.2
Output tokens/s 21 55
Time to first token 1.1s 3.5s
The Known Good

Providers

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

7 hosts
Full provider benchmarks →
Provider Google: Gemma 3 27B blendedGoogle: Gemma 3 27B tok/s OpenAI: GPT-5.2 blendedOpenAI: GPT-5.2 tok/s
Parasail $0.17 37 — —
Phala $0.23 20 — —
DeepInfra $0.10 18 — —
Novita $0.14 17 — —
Nebius $0.15 15 — —
OpenAI · first party — — $2.41 45
Azure · first party — — $4.81 40

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 →