GLM 5.3 Flash

zai-org/GLM-5.3-Flash

The fast, cheap tier of Z.AI's GLM 5.3 family: 1M context with vision and thinking, tuned for high-volume interactive traffic where cost per token dominates.

visionthinkingtool calling

Input: $0.20 / 1M
Output: $0.60 / 1M
Cached: $0.07 / 1M
Context: 1M
Type: Chat
Maker: Zhipu
Released: 2026-08-25

Compared to the portfolio

Intelligence vs price

Chat models on sference

Index

42/100

Blended

$0.30/1M

↖ Smarter for less

$0.50$1.00$2.00$4.00$8.00

42$0.30

Kimi K3

GLM 5.3

DeepSeek V4.1 Flash

GLM 5.3 Flash

↑ IndexBlended $ / 1M · log →

Artificial Analysis Intelligence Index v4.3 (0–100), measured across all providers by Artificial Analysis, not sference specifically. Blended price weights input and output 3:1. Hover a point for the reasoning-effort variant scored. Source

Model	Context	Input	Output	Index	Vision
Kimi K3	1M	$3.00	$15.00	44	—
GLM 5.3	1M	$1.20	$4.20	45	—
DeepSeek V4.1 Flash	1M	$0.50	$1.50	39	✓
GLM 5.3 Flash	1M	$0.20	$0.60	42	✓
DeepSeek V4 Flash (0731)	1M	$0.28	$0.56	—	—
Clef 27Bdecisions	64K	$0.24	—	—	—

Serverless rates per 1M tokens at realtime priority, confirmed per model when your account is provisioned. Dedicated deployments are billed per GPU-hour on monthly commitments.

Use it

POST /v1/chat/completions: Realtime, flex (service_tier: "flex")
POST /v1/responses: Realtime, flex, and the 24h async window (background: true)
POST /v1/messages: Anthropic Messages shape, realtime only

curl https://api.sference.com/v1/chat/completions \
  -H "Authorization: Bearer $SFERENCE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "zai-org/GLM-5.3-Flash",
    "messages": [{ "role": "user", "content": "Say hello in one sentence." }]
  }'

OpenAI-compatible; most clients switch with a base-URL change. Quickstart · Python SDK · Claude Code

Generated from the live catalog (GET /v1/models), so pricing, context, and capabilities always match the API. Machine-readable version: https://sference.com/models/zai-org/GLM-5.3-Flash.md