The Known Good Updated 25 Jul 2026
gpt-4.5-preview vs OpenAI: o3 Mini ·OpenAI vs OpenAI

gpt-4.5-preview vs OpenAI: o3 Mini — head-to-head comparison

gpt-4.5-preview profile OpenAI: o3 Mini profile All comparisons
gpt-4.5-preview — OpenAI
Quality
#43 of 61
47based on 4 of 6 evaluations
Known Good Index
Speed
unranked
—
Output tokens per second
Price
unranked
—
Blended per 1M tokens
Cache hit price
unranked
—
per 1M tokens
Context
unranked
—
tokens
OpenAI: o3 Mini — OpenAI
Quality
#15 of 61
82based on 3 of 6 evaluations
Known Good Index
Speed
#22 of 316
131.8
Output tokens per second
Price
#236 of 340
$1.93
Blended per 1M tokens
In $1.10 · Out $4.40
Cache hit price
#189 of 206
$0.55
per 1M tokens (−50%)
Context
#205 of 345
200k
tokens (~300 pages)
Summary

On the Known Good Index, gpt-4.5-preview scores 47 and OpenAI: o3 Mini scores 82 — a 34-point lead for OpenAI: o3 Mini. They share 10 published evaluations, with gpt-4.5-preview ahead on 1 and OpenAI: o3 Mini ahead on 9.

Published pricing is tracked for OpenAI: o3 Mini only, at $1.93 per 1M tokens blended.

gpt-4.5-preview is proprietary; OpenAI: o3 Mini is proprietary. 1 tracked host serve one or both.

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

At a glance
Metricgpt-4.5-previewOpenAI: o3 Mini
Known Good Index 47 based on 4 of 6 evaluations 82 based on 3 of 6 evaluations
Blended $/1M — $1.93
Output tok/s — 132
Context window — 200k
Providers 0 1
Jump to section

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.

Metricgpt-4.5-previewOpenAI: o3 Mini
Known Good Index 47 82
Mathematics Index 59 88
Science Index 68 78
Reasoning Index 48 85
Openness Index 5 5
The Known Good

Quality Breakdown

Every evaluation both models report a published score for

Evaluations both models report

Bar = gpt-4.5-preview · marker = OpenAI: o3 Mini · scores ingested from Epoch AI (CC-BY 4.0), LiveBench (Apache-2.0)

GPQA Diamond69 / 77
MATH / AIME38 / 77
LiveBench69 / 76
LiveBench Coding75 / 83
LiveBench Data Analysis64 / 71
LiveBench Instruction Following72 / 84
LiveBench Language61 / 51
LiveBench Mathematics69 / 77
LiveBench Reasoning71 / 90
MATH Level 579 / 96

Right-hand figures read gpt-4.5-preview / OpenAI: o3 Mini. gpt-4.5-preview leads on 1 of 10, OpenAI: o3 Mini on 9.

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.

Metricgpt-4.5-previewOpenAI: o3 Mini
Text Arena — 1,319
Text Arena (style controlled) — 1,348
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.

Metricgpt-4.5-previewOpenAI: o3 Mini
Input $/1M — $1.10
Output $/1M — $4.40
Blended $/1M — $1.93
Cache read $/1M — $0.550
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.

Metricgpt-4.5-previewOpenAI: o3 Mini
Context window — 200k
Max output tokens — 100k
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.

Metricgpt-4.5-previewOpenAI: o3 Mini
Output tokens/s — 132
Time to first token — 3.2s
The Known Good

Providers

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

1 host
Full provider benchmarks →
Provider gpt-4.5-preview blendedgpt-4.5-preview tok/s OpenAI: o3 Mini blendedOpenAI: o3 Mini tok/s
OpenAI · first party — — $1.93 127

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)Benchmarks — LiveBench (Apache-2.0)Elo — Arena Full attribution →