Z.ai: GLM 5.3 Flash
Analysis Summary
Z.ai's GLM 5.3 Flash pairs a 1,310,720-token context window with image and video input, tool use, and function calling. Its measured coding and agentic capabilities are strong, while its general reasoning results are also competitive. At $0.15 per million input tokens and $0.50 per million output tokens, it offers a comparatively economical profile for a capable multimodal model.
It is a good candidate for code assistance, long-document analysis, and tool-connected workflows, with vision and video support extending its usefulness to media review. For high-stakes client work, teams should still validate task-specific accuracy and tool reliability. Its balance of capability, context, and price suits a broad production test, especially where premium models would be excessive for routine traffic.
Assessed September 23, 2026
Editorial notes
GLM 5.3 Flash combines strong coding and agentic results with image and video input, tool calling, a 1.3M-token context, and low listed prices.
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DFO Verdict
GLM 5.3 Flash combines strong coding and agentic results with image and video input, tool calling, a 1.3M-token context, and low listed prices.
How Z.ai: GLM 5.3 Flash compares
Z.ai: GLM 5.3 Flash ranks #17 of 446 AI models we track for overall intelligence, #25 of 211 for coding, #10 of 194 for agentic tasks. Its 1.3M-token context window is larger than 99% of the models we list. At $0.15 per million input tokens it is cheaper than 60% of comparable models.
Dark bar = input · light bar = output, scaled to the priciest peer.
1M tokens ≈ 8 full-length novels or ~2,500 pages of business documents in a single request.
Strongest on technical. The pulled-in intelligence corner is the trade-off, and if the shape matters more than the price, this is your model.
Compare shapes side-by-side →Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $0.15 | $0.000150 |
| Output | $0.50 | $0.000500 |
What would Z.ai: GLM 5.3 Flash cost your business?
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A website chatbot handling around 100 customer conversations a day, a few short messages each.
Full calculator with 806 models → Price Calculator
These numbers get smaller with the right architecture.
We route routine calls to cheap models and save Z.ai: GLM 5.3 Flash for the hard ones. Most clients cut their estimate by 60-80%.
Talk to our teamAbout Z.ai: GLM 5.3 Flash
GLM-5.3-Flash is a native multimodal model from Z.ai. It is suited for efficient coding and long-horizon agent tasks. Its hybrid sparse and linear attention architecture maintains accurate long-context behavior while..
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Frequently asked questions about Z.ai: GLM 5.3 Flash
How much does Z.ai: GLM 5.3 Flash cost?
Z.ai: GLM 5.3 Flash costs $0.15 per million input tokens and $0.50 per million output tokens.
What is the context window of Z.ai: GLM 5.3 Flash?
Z.ai: GLM 5.3 Flash has a context window of 1,310,720 tokens (1.3M).
Is Z.ai: GLM 5.3 Flash good for coding?
On our coding benchmark index, Z.ai: GLM 5.3 Flash ranks #25 of 211 models, placing it in the top quartile of the field for code generation and debugging.
What can Z.ai: GLM 5.3 Flash do?
Z.ai: GLM 5.3 Flash supports image/vision input, tool use, and function calling.
Who created Z.ai: GLM 5.3 Flash?
Z.ai: GLM 5.3 Flash is developed by Z.ai and was released on August 26, 2026.