The Known Good Updated 25 Jul 2026
Microsoft: Phi 4 vs OpenAI: gpt-oss-120b ·Microsoft vs OpenAI

Microsoft: Phi 4 vs OpenAI: gpt-oss-120b — head-to-head comparison

Microsoft: Phi 4 profile OpenAI: gpt-oss-120b profile All comparisons
Microsoft: Phi 4 — Microsoft
Quality
#50 of 61
33based on 3 of 6 evaluations
Known Good Index
Speed
#145 of 316
55.4
Output tokens per second
Price
#40 of 340
$0.09
Blended per 1M tokens
In $0.07 · Out $0.14
Cache hit price
unranked
per 1M tokens
Context
#334 of 345
16k
tokens (~25 pages)
OpenAI: gpt-oss-120b — OpenAI
Quality
#33 of 61
61based on 3 of 6 evaluations
Known Good Index
Speed
#9 of 316
172.8
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, Microsoft: Phi 4 scores 33 and OpenAI: gpt-oss-120b scores 61 — a 28-point lead for OpenAI: gpt-oss-120b. They share 2 published evaluations, with Microsoft: Phi 4 ahead on 0 and OpenAI: gpt-oss-120b ahead on 2.

Blended pricing is $0.09 per 1M tokens for Microsoft: Phi 4 and $0.07 for OpenAI: gpt-oss-120b — OpenAI: gpt-oss-120b is about 1.2× cheaper.

Throughput is 55 tokens per second for Microsoft: Phi 4 and 173 for OpenAI: gpt-oss-120b, with time to first token at 0.2s and 0.7s. Microsoft: Phi 4 accepts 16k tokens of context against 131k.

Microsoft: Phi 4 is open weights under Open weights (unrestricted); OpenAI: gpt-oss-120b is open weights under Open weights (unrestricted). 17 tracked hosts serve one or both, and 1 serve both.

Generated from tracked data on 26 Jul 2026 · how these comparisons are computed →

At a glance
MetricMicrosoft: Phi 4OpenAI: gpt-oss-120b
Known Good Index 33 based on 3 of 6 evaluations 61 based on 3 of 6 evaluations
Blended $/1M $0.09 $0.07
Output tok/s 55 173
Context window 16k 131k
Providers 1 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.

MetricMicrosoft: Phi 4OpenAI: gpt-oss-120b
Known Good Index 33 61
Mathematics Index 39 89
Science Index 53 77
Reasoning Index 47
Agentic Index 18
Openness Index 60 60
The Known Good

Quality Breakdown

Every evaluation both models report a published score for

Evaluations both models report

Bar = Microsoft: Phi 4 · marker = OpenAI: gpt-oss-120b · scores ingested from Epoch AI (CC-BY 4.0)

GPQA Diamond56 / 76
MATH / AIME14 / 89

Right-hand figures read Microsoft: Phi 4 / OpenAI: gpt-oss-120b. Microsoft: Phi 4 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.

MetricMicrosoft: Phi 4OpenAI: gpt-oss-120b
Text Arena 1,217 1,366
Text Arena (style controlled) 1,256 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.

MetricMicrosoft: Phi 4OpenAI: gpt-oss-120b
Input $/1M $0.07 $0.04
Output $/1M $0.14 $0.17
Blended $/1M $0.09 $0.07
Cache read $/1M $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.

MetricMicrosoft: Phi 4OpenAI: gpt-oss-120b
Context window 16k 131k
Max output tokens 16k 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.

MetricMicrosoft: Phi 4OpenAI: gpt-oss-120b
Output tokens/s 55 173
Time to first token 0.2s 0.7s
The Known Good

Providers

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

17 hosts · 1 serve both
Full provider benchmarks →
Provider Microsoft: Phi 4 blendedMicrosoft: Phi 4 tok/s OpenAI: gpt-oss-120b blendedOpenAI: gpt-oss-120b tok/s
DeepInfra $0.09 38 $0.07 282
Cerebras $0.45 505
Groq $0.26 445
SambaNova $0.34 304
BaseTen $0.20 255
Nebius $0.26 255
Mara $0.30 198
Parasail $0.26 198
Google · first party $0.16 197
Together $0.26 108
Amazon Bedrock · first party $0.26 103
Phala $0.26 86
Novita $0.10 67
DigitalOcean $0.17 63
Mancer 2 $0.17 49
SiliconFlow $0.15 29
CoreWeave $0.07 24

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 →