The Known Good Updated 2 Sep 2026 Subscribe
o1-mini vs OpenAI: GPT-5.5 ·OpenAI vs OpenAI

o1-mini vs OpenAI: GPT-5.5 — head-to-head comparison

o1-mini profile OpenAI: GPT-5.5 profile All comparisons
o1-mini — OpenAI
Quality
#39 of 65
65based on 4 of 7 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: GPT-5.5 — OpenAI
Quality
#5 of 65
93based on 3 of 7 evaluations
Known Good Index
Speed
#65 of 339
85.0
Output tokens per second
Price
#412 of 439
$11.25
Blended per 1M tokens
In $5.00 · Out $30.00
Cache hit price
#295 of 322
$0.50
per 1M tokens (−90%)
Context
#30 of 473
1.05M
tokens (~1,600 pages)
Summary

On the Known Good Index, o1-mini scores 65 and OpenAI: GPT-5.5 scores 93 — a 28-point lead for OpenAI: GPT-5.5. They share 2 published evaluations, with o1-mini ahead on 0 and OpenAI: GPT-5.5 ahead on 2.

Published pricing is tracked for OpenAI: GPT-5.5 only, at $11.25 per 1M tokens blended.

o1-mini is proprietary; OpenAI: GPT-5.5 is proprietary. 3 tracked hosts serve one or both.

Generated from tracked data on 3 Sep 2026 · how these comparisons are computed →

At a glance
Metrico1-miniOpenAI: GPT-5.5
Known Good Index 65 based on 4 of 7 evaluations 93 based on 3 of 7 evaluations
Blended $/1M — $11.25
Output tok/s — 85
Context window — 1.05M
Providers 0 3
Jump to section

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.

Metrico1-miniOpenAI: GPT-5.5
Known Good Index 65 93
Mathematics Index 69 —
Reasoning Index 66 —
Openness Index 5 5
The Known Good

Quality Breakdown

Every evaluation both models report a published score for

Evaluations both models report

Bar = o1-mini · marker = OpenAI: GPT-5.5 · scores ingested from Epoch AI (CC-BY 4.0)

GPQA Diamond62 / 91
Mock AIME 2024–2547 / 84

Right-hand figures read o1-mini / OpenAI: GPT-5.5. o1-mini leads on 0 of 2, OpenAI: GPT-5.5 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.

Metrico1-miniOpenAI: GPT-5.5
Text Arena 1,317 1,467
Text Arena (style controlled) 1,337 1,477
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.

Metrico1-miniOpenAI: GPT-5.5
Input $/1M — $5.00
Output $/1M — $30.00
Blended $/1M — $11.25
Cache read $/1M — $0.500
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.

Metrico1-miniOpenAI: GPT-5.5
Context window — 1.05M
Max output tokens — 128k
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.

Metrico1-miniOpenAI: GPT-5.5
Output tokens/s — 85
Time to first token — 4.9s
The Known Good

Providers

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

3 hosts
Full provider benchmarks →
Provider o1-mini blendedo1-mini tok/s OpenAI: GPT-5.5 blendedOpenAI: GPT-5.5 tok/s
Amazon Bedrock · first party — — $12.38 180
OpenAI · first party — — $5.62 70
Azure · first party — — $11.25 54

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 →