z-ai
Z.ai: GLM 5.3 Flash
Z.ai's GLM 5.3 Flash can process text, images, and videos, with a vast context length of 1.3 million tokens. It supports both reasoning and tools integration, though structured output support is not specified. This model stands out with its comprehensive capabilities across multiple input modalities. Given its blended benchmark score of 97.4, GLM 5.3 Flash is highly competitive for tasks requiring advanced AI reasoning and a wide range of data types. Its pricing at $0.075 per million input tokens and $0.25 per million output tokens makes it an attractive option, especially considering its strong performance. Users who need robust handling of diverse data inputs and high-quality reasoning processes should seriously consider this model for their projects.
Quality Score
100/100
price + capability + benchmarks
Input Price
$0.07
per 1M tokens · checked 2026-08-27
Output Price
$0.25
per 1M tokens · checked 2026-08-27
Context Window
1,310,720
tokens
Benchmark results
Independent, published benchmarks. Blended score 97.4 across 3 benchmarks, last refreshed 2026-08-27. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 94.8 |
| AI Index Coding | software engineering tasks | 100.0 |
| AI Index Agentic | multi-step tool-using tasks | 96.0 |
- Model ID
- z-ai/glm-5.3-flash
- Vendor
- z-ai
- Released
- August 2026
- Tokenizer
- Other
- Input Modalities
- text, image, video
- Output Modalities
- text
- Max Output
- 131,072 tokens
- Tool Calling
- ✓ supported
- Structured Output
- ✓ supported
- Reasoning Mode
- ✓ supported
- Vision
- ✓ accepts images
- Audio
- no
- Moderated
- no
What it costs in practice
Computed from the current $0.07/M input and $0.25/M output rates. Run your own numbers →
| Job | Tokens | Cost |
|---|---|---|
| Summarize a 50-page report | 30k in / 1.5k out | under $0.01 |
| Classify 1,000 customer emails | 500k in / 50k out | $0.05 |
| A month of a busy support chatbot | 5M in / 2M out | $0.88 |
Strong choice for
Code
Regex Writing
Crafting regular expressions that actually match what you intend.
Data
JSON Extraction
Pulling structured fields out of unstructured text.
Data
Bulk Data Labeling
Cheaply tagging thousands of items with consistent labels.
Writing
Short-Form Summarization
TL;DRs of articles and emails at scale.
Writing
Email Drafting
Cold emails, replies, and outreach at the right tone.
Writing
Language Translation
High-quality multilingual translation.
Category rankings
Where Z.ai: GLM 5.3 Flash places across the 78 categories it ranks in. How we rank →
| # | Category | Score |
|---|---|---|
| #1 | JSON ExtractionData · of 25 ranked | 149 |
| #1 | Bulk Data LabelingData · of 25 ranked | 135 |
| #1 | Short-Form SummarizationWriting · of 25 ranked | 133 |
| #1 | Email DraftingWriting · of 25 ranked | 129 |
| #1 | Language LearningEducation · of 25 ranked | 129 |
| #1 | Customer SupportBusiness · of 25 ranked | 136 |
| #1 | Image CaptioningVision · of 25 ranked | 121 |
| #1 | Chat CompanionPersonal · of 25 ranked | 133 |
| #1 | Trivia & General KnowledgePersonal · of 25 ranked | 123 |
| #1 | Dataset AnnotationResearch · of 25 ranked | 145 |
| #1 | Real-Time ChatLatency · of 25 ranked | 118 |
| #2 | Video Auto-TaggingVideo · of 25 ranked | 123 |
| #3 | Sales / Cold EmailBusiness · of 25 ranked | 125 |
| #3 | Job Application DraftingBusiness · of 25 ranked | 125 |
| #3 | Journaling HelperPersonal · of 25 ranked | 125 |
| #3 | Recipe GenerationPersonal · of 25 ranked | 125 |
| #4 | Regex WritingCode · of 25 ranked | 139 |
| #4 | Language TranslationWriting · of 25 ranked | 139 |
| #4 | Resume WritingBusiness · of 25 ranked | 119 |
| #4 | SOP / Process DocsBusiness · of 25 ranked | 139 |
| #4 | Tutoring for KidsPersonal · of 25 ranked | 139 |
| #5 | Video SummarizationVideo · of 25 ranked | 162 |
| #7 | Code CompletionCode · of 25 ranked | 133 |
| #7 | Marketing CopyWriting · of 25 ranked | 133 |
| #7 | Standardized Test PrepEducation · of 25 ranked | 133 |
| #7 | Function / Tool CallingAgents · of 25 ranked | 158 |
| #8 | Self-Hosted / LocalCost · of 25 ranked | 117 |
| #9 | SQL GenerationCode · of 25 ranked | 175 |
| #10 | Browser AutomationAgents · of 25 ranked | 177 |
| #11 | Blog Post WritingWriting · of 25 ranked | 143 |
| #11 | Trip PlanningPersonal · of 25 ranked | 143 |
| #12 | Code DocumentationCode · of 25 ranked | 145 |
| #12 | Diagram ExtractionVision · of 25 ranked | 151 |
| #12 | Cheap Bulk InferenceCost · of 25 ranked | 137 |
| #13 | Data AnalysisData · of 25 ranked | 176 |
| #13 | Social Media PostsWriting · of 25 ranked | 119 |
| #13 | Meeting NotesBusiness · of 25 ranked | 153 |
| #13 | Voice Assistant BackendVoice · of 25 ranked | 123 |
| #14 | Frontend Component DesignCode · of 25 ranked | 149 |
| #14 | CSV / Spreadsheet CleanupData · of 25 ranked | 155 |
| #15 | OCR / Document ParsingData · of 25 ranked | 147 |
| #15 | Table Extraction from PDFsData · of 25 ranked | 147 |
| #15 | Financial AnalysisProfessional · of 25 ranked | 163 |
| #15 | Screenshot DebuggingVision · of 25 ranked | 145 |
| #15 | Chart & Graph ReadingVision · of 25 ranked | 155 |
| #15 | Character RoleplayPersonal · of 25 ranked | 153 |
| #15 | Fitness CoachingPersonal · of 25 ranked | 137 |
| #16 | Math TutoringEducation · of 25 ranked | 150 |
| #16 | Experiment DesignResearch · of 25 ranked | 160 |
| #17 | Unit Test GenerationCode · of 25 ranked | 157 |
| #17 | CI/CD PipelinesCode · of 25 ranked | 147 |
| #17 | Long-Document SummarizationWriting · of 25 ranked | 162 |
| #17 | Agent WorkflowsAgents · of 25 ranked | 198 |
| #17 | Coding AgentsAgents · of 25 ranked | 198 |
| #18 | Bug FixingCode · of 25 ranked | 186 |
| #18 | Physics TutoringEducation · of 25 ranked | 150 |
| #18 | Scientific CodingResearch · of 25 ranked | 186 |
| #21 | ETL ScriptingData · of 25 ranked | 157 |
| #21 | Medical Note SummarizationProfessional · of 25 ranked | 157 |
| #21 | History TutoringEducation · of 25 ranked | 147 |
| #22 | Code ReviewCode · of 25 ranked | 170 |
| #22 | Code RefactoringCode · of 25 ranked | 166 |
| #22 | Creative WritingWriting · of 25 ranked | 160 |
| #22 | Screenwriting & DialogWriting · of 25 ranked | 160 |
| #22 | Academic WritingWriting · of 25 ranked | 160 |
| #22 | Legal DraftingProfessional · of 25 ranked | 160 |
| #22 | Legal ResearchProfessional · of 25 ranked | 170 |
| #22 | Contract ReviewProfessional · of 25 ranked | 180 |
| #22 | Scientific ResearchProfessional · of 25 ranked | 170 |
| #22 | Essay GradingEducation · of 25 ranked | 170 |
| #22 | RFP ResponseBusiness · of 25 ranked | 176 |
| #22 | OKRs & Strategic PlanningBusiness · of 25 ranked | 160 |
| #22 | RAG PipelinesAgents · of 25 ranked | 166 |
| #22 | Long-Context Q&AAgents · of 25 ranked | 156 |
| #22 | Fiction CollaboratorPersonal · of 25 ranked | 170 |
| #22 | Math ProofsResearch · of 25 ranked | 160 |
| #22 | Literature ReviewResearch · of 25 ranked | 170 |
| #24 | Transcript CleanupWriting · of 25 ranked | 141 |
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Quick answers
- How much does Z.ai: GLM 5.3 Flash cost?
- $0.07 per million input tokens and $0.25 per million output tokens.
- What is Z.ai: GLM 5.3 Flash's context window?
- 1,310,720 tokens, roughly 1,966 pages of text in a single request.
- Does Z.ai: GLM 5.3 Flash support tool calling?
- It supports tool calling, structured output, a reasoning mode.
- Can Z.ai: GLM 5.3 Flash process images?
- Yes, it accepts image input.