AI Index

GLM-5.3-FlashvsGPT-5 nano

Both language models, compared at each maker’s own API list prices. Every figure links to its source.

Compare at your usage

Every model priced for the same request
Prompt per request
Cache hits
Batch
Service tier

8,000 tokens in, 2,000 out

GLM-5.3-Flash on Z.ai APIGPT-5 nano on OpenAI API
Rate appliedBase rateBase rate
Inputper 1M tokens$0.15 $0.050
Cache readper 1M tokens$0.030 $0.005
Outputper 1M tokens$0.50 $0.40
Cost per request$0.0022$0.0012
Per 1,000 requests$2.20$1.20

Every model is priced for the same request at its maker’s own list prices (each with its source and date), so bold marks the cheapest. A model that can’t serve the request is named, not ranked; a condition its seller doesn’t price says which rate was used.

Cost per request as prompts grow

2K tokens out, list price on each maker’s API. A line ends at the model’s context window.

0$0.050$0.10$0.150250K500K750K1Mprompt tokens per request8KGLM-5.3-Flash$0.0022 at 8KGPT-5 nano$0.0012 at 8K
  • GLM-5.3-Flash · Z.ai API
  • GPT-5 nano · OpenAI API

Where each stands among all scored models

Each line runs from the lowest to the highest score on the board; the tick is the median.

Epoch Capabilities Index#49 vs #99 of 118GPT-5 nano: 139.2GLM-5.3-Flash: 153.6LMArena Text#27 vs #132 of 163GPT-5 nano: 1,338GLM-5.3-Flash: 1,477LMArena Text · Coding#22 vs #132 of 163GPT-5 nano: 1,385GLM-5.3-Flash: 1,526LMArena Vision#18 vs #71 of 89GPT-5 nano: 1,160GLM-5.3-Flash: 1,294
  • GLM-5.3-Flash
  • GPT-5 nano

Key differences

GLM-5.3-FlashGPT-5 nano
InputMaker’s official API · global · USD
$0.15 / 1M tokens Pricing · as of Nov 1, 2026
$0.050 / 1M tokens OpenAI API pricing · as of Nov 2, 2026
OutputMaker’s official API · global · USD
$0.50 / 1M tokens Pricing · as of Nov 1, 2026
$0.40 / 1M tokens OpenAI API pricing · as of Nov 2, 2026
Context
1,000,000 GLM-5.3-Flash/FlashX · as of Nov 1, 2026
400,000 GPT-5 Nano model · as of Nov 4, 2026
Input modalities
Text, Image, Video GLM-5.3-Flash/FlashX · as of Nov 1, 2026
Text, Image GPT-5 Nano model · as of Nov 4, 2026
Cache readMaker’s official API · global · USD
$0.030 / 1M tokens Pricing · as of Nov 1, 2026
$0.005 / 1M tokens OpenAI API pricing · as of Nov 2, 2026

These differences use verified vendor specifications or each maker’s official API on the same region, currency, meter and billing conditions. Different conditions remain side by side in the full table; they do not establish which model is cheaper. Declared features describe support, not measured quality or a recommendation. Missing evidence does not mean a feature is unsupported.

Full comparison

GLM-5.3-Flash Zhipu AI GPT-5 nano OpenAI
Overview
ReleasedAug 26, 2026 Aug 7, 2025
Open weightsYes —
Knowledge cutoffNot stated May 2024
Specs
Context1M 400K
Max inputNot stated 272K
Max output128K 128K
Input modalitiesText, Image, Video Text, Image
Output modalitiesText Text
ReasoningYes Yes
Reasoning effortslow, high, max minimal, low, medium, high
Reasoning can be off— Not stated
Tool useYes Yes
Structured outputYes Yes
Pricing · per 1M tokens
Input price$0.15 $0.050Also priced under other conditions: Batch, Flex tier
Output price$0.50 $0.40Also priced under other conditions: Batch, Flex tier
Cache read price$0.030 $0.005Also priced under other conditions: Batch, Flex tier
Blended price (3 input : 1 output)$0.2375 $0.1375
Pricing under conditions · per 1M tokens
Batch input priceNot offered $0.025Batch
Batch output priceNot offered $0.20Batch
Flex tier input priceNot offered $0.025Flex tier
Flex tier output priceNot offered $0.20Flex tier
Cited scores
Epoch Capabilities Index153.6 139.2
LMArena Text1,477 1,338 high effort
LMArena Text · Coding1,526 1,385 high effort
LMArena Vision1,294 1,160 high effort
LMArena Text · Chinese1,530 1,378 high effort
Epoch AI · GPQA Diamond90.2% max effort—
Epoch AI · FrontierMath Tiers 1–355.8% max effort—

Headline prices may come from different channels, regions or tiers. Check each source before choosing a model; missing facts stay blank.

Model details and sources

Cited scores