GLM 5.3 is a Z.ai model with 1M context, $1.40 in / $4.40 out per million tokens, last verified October 2, 2026. Open weights: yes. Public-board scores are linked to the publisher; vendor-only figures stay in the watch-out, not on the board.
Z.ai's text-only GLM flagship, with a 753B-total MoE checkpoint and always-enabled reasoning. Published benchmark figures identify particular harnesses and settings.
Recorded profile verification October 2, 2026·Individual provider fields may change
Pricing tiers: Z.ai token API $1.40/$4.40 per MTok; cached input $0.26. Cache storage is listed as limited-time free, with no verified end date. Coding Plan points are separate: off-peak/weekend calls consume half the standard points. API docs advertise 1M context and specify a 131,072 output ceiling.
Publisher evidence
Published benchmark results
Each result keeps its source date visible. Dates refer to source publication or capture unless the source explicitly states when it measured the result. A missing benchmark is not treated as a zero.
Published benchmark results for GLM 5.3
Benchmark
Score
Source date
Source
Artificial Analysis Intelligence Index [max]GLM-5.3 (max)
Z.ai GLM-5.3 blog + HF model card eval results (vendor, Claude Code harness) · View source
DeepSWE 1.1
66.9%
2026-08-14
Z.ai GLM-5.3 blog + HF model card (vendor, mini-swe-agent family) · View source
Humanity's Last Exam
62.5%
2026-08-14
Z.ai GLM-5.3 blog + HF model card (vendor, with tools, full set) · View source
Best for
Coding Plan subscribers
Long-horizon coding
Chinese + English
Watch out
Custom licence: model-as-a-service operators whose licensee/affiliate aggregate revenue exceeds $10B in any consecutive 12 months require Z.AI security review before commercial use; the definition excludes embedded end-user features/harnesses and mere relays. Keep attribution/permission notices. Reasoning defaults to max; disabling it fails. Accounts that ever subscribed to Coding Plan, including expired subscriptions, currently have Model API access only through the Chat Completions-compatible protocol. Active parameter count and exact initial weight-publication day remain unverified.
Source receipts
Catalog figures for this model were checked against the following sources.
Answered from the verified figures on this page rather than general guidance.
How much does GLM 5.3 cost per million tokens?
GLM 5.3 lists base rates of $1.40 per million input tokens and $4.40 per million output tokens. Estimate both input and output token volume and any additional charges for your workload. Z.ai token API $1.40/$4.40 per MTok; cached input $0.26. Cache storage is listed as limited-time free, with no verified end date. Coding Plan points are separate: off-peak/weekend calls consume half the standard points. API docs advertise 1M context and specify a 131,072 output ceiling.
What is GLM 5.3's context window?
GLM 5.3 accepts about 1M tokens of context. That only matters if you routinely send very long documents, large codebases, or multi-turn histories that approach that limit.
What is GLM 5.3 best for?
GLM 5.3 is a frontier tier from Z.ai. It suits coding plan subscribers, long-horizon coding, chinese + english. Custom licence: model-as-a-service operators whose licensee/affiliate aggregate revenue exceeds $10B in any consecutive 12 months require Z.AI security review before commercial use; the definition excludes embedded end-user features/harnesses and mere relays. Keep attribution/permission notices. Reasoning defaults to max; disabling it fails. Accounts that ever subscribed to Coding Plan, including expired subscriptions, currently have Model API access only through the Chat Completions-compatible protocol. Active parameter count and exact initial weight-publication day remain unverified.
Can I self-host GLM 5.3?
GLM 5.3 publishes open weights, but self-hosting depends on the licence, hardware footprint, quantisation quality, and serving stack. A hosted API is often cheaper until you have measured throughput and concurrency on your own hardware.
