The Known Good Updated 29 Jul 2026
OpenAI: gpt-oss-120b vs Z.ai: GLM 4.7 ·OpenAI vs Z.ai

OpenAI: gpt-oss-120b vs Z.ai: GLM 4.7 — head-to-head comparison

OpenAI: gpt-oss-120b profile Z.ai: GLM 4.7 profile All comparisons
OpenAI: gpt-oss-120b — OpenAI
Quality
#42 of 62
61based on 3 of 7 evaluations
Known Good Index
Speed
#13 of 317
144.7
Output tokens per second
Price
#35 of 370
$0.07
Blended per 1M tokens
In $0.04 · Out $0.17
Cache hit price
#28 of 238
$0.015
per 1M tokens (−59%)
Context
#265 of 375
131k
tokens (~200 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: gpt-oss-120b scores 61 and Z.ai: GLM 4.7 scores 68 — a 7-point lead for Z.ai: GLM 4.7. They share 3 published evaluations, with OpenAI: gpt-oss-120b ahead on 1 and Z.ai: GLM 4.7 ahead on 2.

Blended pricing is $0.07 per 1M tokens for OpenAI: gpt-oss-120b and $0.74 for Z.ai: GLM 4.7 — OpenAI: gpt-oss-120b is about 10.5× cheaper.

Throughput is 145 tokens per second for OpenAI: gpt-oss-120b and 60 for Z.ai: GLM 4.7, with time to first token at 0.9s and 3.1s. OpenAI: gpt-oss-120b accepts 131k tokens of context against 205k.

OpenAI: gpt-oss-120b is open weights under Open weights (unrestricted); Z.ai: GLM 4.7 is open weights under Open weights (unrestricted). 21 tracked hosts serve one or both, and 5 serve both.

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

At a glance
MetricOpenAI: gpt-oss-120bZ.ai: GLM 4.7
Known Good Index 61 based on 3 of 7 evaluations 68 based on 3 of 7 evaluations
Blended $/1M $0.07 $0.74
Output tok/s 145 60
Context window 131k 205k
Providers 17 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: gpt-oss-120bZ.ai: GLM 4.7
Known Good Index 61 68
Mathematics Index 89 83
Agentic Index 18 35
Openness Index 60 60
The Known Good

Quality Breakdown

Every evaluation both models report a published score for

Evaluations both models report

Bar = OpenAI: gpt-oss-120b · marker = Z.ai: GLM 4.7 · scores ingested from Epoch AI (CC-BY 4.0)

GPQA Diamond76 / 83
Mock AIME 2024–2589 / 83
Terminal-Bench19 / 33

Right-hand figures read OpenAI: gpt-oss-120b / Z.ai: GLM 4.7. OpenAI: gpt-oss-120b leads on 1 of 3, Z.ai: GLM 4.7 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.

MetricOpenAI: gpt-oss-120bZ.ai: GLM 4.7
Text Arena 1,366 1,436
Text Arena (style controlled) 1,352 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: gpt-oss-120bZ.ai: GLM 4.7
Input $/1M $0.04 $0.40
Output $/1M $0.17 $1.75
Blended $/1M $0.07 $0.74
Cache read $/1M $0.015 $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: gpt-oss-120bZ.ai: GLM 4.7
Context window 131k 205k
Max output tokens 131k 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: gpt-oss-120bZ.ai: GLM 4.7
Output tokens/s 145 60
Time to first token 0.9s 3.1s
The Known Good

Providers

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

21 hosts · 5 serve both
Full provider benchmarks →
Provider OpenAI: gpt-oss-120b blendedOpenAI: gpt-oss-120b tok/s Z.ai: GLM 4.7 blendedZ.ai: GLM 4.7 tok/s
Cerebras $0.45 501 $2.38 310
SambaNova $0.34 367
Groq $0.26 352
Amazon Bedrock · first party $0.26 342
Nebius $0.26 231
DeepInfra $0.07 196 $0.74 38
Google · first party $0.16 177 $1.00 122
BaseTen $0.20 171
Mara $0.30 146
Together $0.26 114
Parasail $0.26 101
Phala $0.26 82 $1.46 36
Novita $0.10 64 $0.90 21
Mancer 2 $0.17 40
CoreWeave $0.07 32
DigitalOcean $0.17 22
SiliconFlow $0.15 12
AtlasCloud $0.85 35
Venice $1.07 33
StreamLake $0.80 24
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 →