The Known Good Updated 25 Jul 2026
Google: Gemini 3 Flash Preview vs OpenAI: gpt-oss-120b ·Google vs OpenAI

Google: Gemini 3 Flash Preview vs OpenAI: gpt-oss-120b — head-to-head comparison

Google: Gemini 3 Flash Preview profile OpenAI: gpt-oss-120b profile All comparisons
Google: Gemini 3 Flash Preview — Google
Quality
#13 of 61
83based on 4 of 6 evaluations
Known Good Index
Speed
#68 of 316
88.9
Output tokens per second
Price
#205 of 340
$1.12
Blended per 1M tokens
In $0.50 · Out $3.00
Cache hit price
#67 of 206
$0.050
per 1M tokens (−90%)
Context
#27 of 345
1.05M
tokens (~1,600 pages)
OpenAI: gpt-oss-120b — OpenAI
Quality
#33 of 61
61based on 3 of 6 evaluations
Known Good Index
Speed
#10 of 316
172.2
Output tokens per second
Price
#33 of 340
$0.07
Blended per 1M tokens
In $0.04 · Out $0.17
Cache hit price
#25 of 206
$0.015
per 1M tokens (−59%)
Context
#238 of 345
131k
tokens (~200 pages)
Summary

On the Known Good Index, Google: Gemini 3 Flash Preview scores 83 and OpenAI: gpt-oss-120b scores 61 — a 22-point lead for Google: Gemini 3 Flash Preview. They share 3 published evaluations, with Google: Gemini 3 Flash Preview ahead on 3 and OpenAI: gpt-oss-120b ahead on 0.

Blended pricing is $1.12 per 1M tokens for Google: Gemini 3 Flash Preview and $0.07 for OpenAI: gpt-oss-120b — OpenAI: gpt-oss-120b is about 16.0× cheaper.

Throughput is 89 tokens per second for Google: Gemini 3 Flash Preview and 172 for OpenAI: gpt-oss-120b, with time to first token at 2.0s and 0.7s. Google: Gemini 3 Flash Preview accepts 1.05M tokens of context against 131k.

Google: Gemini 3 Flash Preview is proprietary; OpenAI: gpt-oss-120b is open weights under Open weights (unrestricted). 18 tracked hosts serve one or both, and 1 serve both.

Generated from tracked data on 25 Jul 2026 · how these comparisons are computed →

At a glance
MetricGoogle: Gemini 3 Flash PreviewOpenAI: gpt-oss-120b
Known Good Index 83 based on 4 of 6 evaluations 61 based on 3 of 6 evaluations
Blended $/1M $1.12 $0.07
Output tok/s 89 172
Context window 1.05M 131k
Providers 2 17
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Quality

Known Good Index and the capability indices, side by side

IndicesComponents
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: Gemini 3 Flash PreviewOpenAI: gpt-oss-120b
Known Good Index 83 61
Coding Index 77
Mathematics Index 93 89
Science Index 86 77
Agentic Index 77 18
Openness Index 5 60
The Known Good

Quality Breakdown

Every evaluation both models report a published score for

Evaluations both models report

Bar = Google: Gemini 3 Flash Preview · marker = OpenAI: gpt-oss-120b · scores ingested from Epoch AI (CC-BY 4.0)

GPQA Diamond83 / 76
MATH / AIME93 / 89
Terminal-Bench64 / 19

Right-hand figures read Google: Gemini 3 Flash Preview / OpenAI: gpt-oss-120b. Google: Gemini 3 Flash Preview leads on 3 of 3, 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.

MetricGoogle: Gemini 3 Flash PreviewOpenAI: gpt-oss-120b
Text Arena 1,366
Text Arena (style controlled) 1,352
The Known Good

Price & Cost

Published API pricing by token type

Per token typeCache discount
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: Gemini 3 Flash PreviewOpenAI: gpt-oss-120b
Input $/1M $0.50 $0.04
Output $/1M $3.00 $0.17
Blended $/1M $1.12 $0.07
Cache read $/1M $0.050 $0.015
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: Gemini 3 Flash PreviewOpenAI: gpt-oss-120b
Context window 1.05M 131k
Max output tokens 66k 131k
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: Gemini 3 Flash PreviewOpenAI: gpt-oss-120b
Output tokens/s 89 172
Time to first token 2.0s 0.7s
The Known Good

Providers

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

18 hosts · 1 serve both
Full provider benchmarks →
Provider Google: Gemini 3 Flash Preview blendedGoogle: Gemini 3 Flash Preview tok/s OpenAI: gpt-oss-120b blendedOpenAI: gpt-oss-120b tok/s
Google · first party $0.56 85 $0.16 85
Google AI Studio $0.56 60
Cerebras $0.45 495
Groq $0.26 411
SambaNova $0.34 306
BaseTen $0.20 285
Nebius $0.26 281
DeepInfra $0.07 246
Parasail $0.26 207
Mara $0.30 181
Amazon Bedrock · first party $0.26 166
Together $0.26 111
Phala $0.26 82
DigitalOcean $0.17 62
Novita $0.10 42
CoreWeave $0.07 41
Mancer 2 $0.17 41
SiliconFlow $0.15 26

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 →