The Known Good Updated 29 Jul 2026
OpenAI: o3 vs Z.ai: GLM 4.7 ·OpenAI vs Z.ai

OpenAI: o3 vs Z.ai: GLM 4.7 — head-to-head comparison

OpenAI: o3 profile Z.ai: GLM 4.7 profile All comparisons
OpenAI: o3 — OpenAI
Quality
#25 of 62
74based on 5 of 7 evaluations
Known Good Index
Speed
#85 of 317
70.8
Output tokens per second
Price
#292 of 370
$3.50
Blended per 1M tokens
In $2.00 · Out $8.00
Cache hit price
#204 of 238
$0.50
per 1M tokens (−75%)
Context
#226 of 375
200k
tokens (~300 pages)
Z.ai: GLM 4.7 — Z.ai
Quality
#30 of 62
68based on 3 of 7 evaluations
Known Good Index
Speed
#115 of 317
60.4
Output tokens per second
Price
#177 of 370
$0.74
Blended per 1M tokens
In $0.40 · Out $1.75
Cache hit price
#102 of 238
$0.080
per 1M tokens (−80%)
Context
#219 of 375
205k
tokens (~300 pages)
Summary

On the Known Good Index, OpenAI: o3 scores 74 and Z.ai: GLM 4.7 scores 68 — a 6-point lead for OpenAI: o3. They share 2 published evaluations, with OpenAI: o3 ahead on 1 and Z.ai: GLM 4.7 ahead on 1.

Blended pricing is $3.50 per 1M tokens for OpenAI: o3 and $0.74 for Z.ai: GLM 4.7 — Z.ai: GLM 4.7 is about 4.7× cheaper.

Throughput is 71 tokens per second for OpenAI: o3 and 60 for Z.ai: GLM 4.7, with time to first token at 3.6s and 3.1s. OpenAI: o3 accepts 200k tokens of context against 205k.

OpenAI: o3 is proprietary; Z.ai: GLM 4.7 is open weights under Open weights (unrestricted). 10 tracked hosts serve one or both.

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

At a glance
MetricOpenAI: o3Z.ai: GLM 4.7
Known Good Index 74 based on 5 of 7 evaluations 68 based on 3 of 7 evaluations
Blended $/1M $3.50 $0.74
Output tok/s 71 60
Context window 200k 205k
Providers 1 9
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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.

MetricOpenAI: o3Z.ai: GLM 4.7
Known Good Index 74 68
Mathematics Index 92 83
Reasoning Index 62 —
Agentic Index 60 35
Openness Index 5 60
The Known Good

Quality Breakdown

Every evaluation both models report a published score for

Evaluations both models report

Bar = OpenAI: o3 · marker = Z.ai: GLM 4.7 · scores ingested from Epoch AI (CC-BY 4.0)

GPQA Diamond82 / 83
Mock AIME 2024–2584 / 83

Right-hand figures read OpenAI: o3 / Z.ai: GLM 4.7. OpenAI: o3 leads on 1 of 2, Z.ai: GLM 4.7 on 1.

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.

MetricOpenAI: o3Z.ai: GLM 4.7
Text Arena — 1,436
Text Arena (style controlled) — 1,442
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.

MetricOpenAI: o3Z.ai: GLM 4.7
Input $/1M $2.00 $0.40
Output $/1M $8.00 $1.75
Blended $/1M $3.50 $0.74
Cache read $/1M $0.500 $0.080
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.

MetricOpenAI: o3Z.ai: GLM 4.7
Context window 200k 205k
Max output tokens 100k 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.

MetricOpenAI: o3Z.ai: GLM 4.7
Output tokens/s 71 60
Time to first token 3.6s 3.1s
The Known Good

Providers

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

10 hosts
Full provider benchmarks →
Provider OpenAI: o3 blendedOpenAI: o3 tok/s Z.ai: GLM 4.7 blendedZ.ai: GLM 4.7 tok/s
OpenAI · first party $3.50 84 — —
Cerebras — — $2.38 310
Google · first party — — $1.00 122
DeepInfra — — $0.74 38
Phala — — $1.46 36
AtlasCloud — — $0.85 35
Venice — — $1.07 33
StreamLake — — $0.80 24
Novita — — $0.90 21
Z.AI · first party — — $1.00 21

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 →