--- title: "Z.ai: GLM 5.3 FlashX — unrated, priced in this catalogue · Undominated.ai" canonical: https://undominated.ai/models/z-ai__glm-5.3-flashx/ description: "Z.ai: GLM 5.3 FlashX: $0.370/M in, $1.25/M out. No independent quality score in this catalogue — unrated, not ranked, not scored zero." --- # Z.ai: GLM 5.3 FlashX — unrated, priced in this catalogue · Undominated.ai > Z.ai: GLM 5.3 FlashX: $0.370/M in, $1.25/M out. No independent quality score in this catalogue — unrated, not ranked, not scored zero. [Check base rates for this workload](/check/z-ai__glm-5.3-flashx/) [Cheaper alternatives](/alternatives/) [Family](/families/glm/) [Compare models](https://undominated.ai/compare/?models=z-ai%2Fglm-5.3-flashx) Comparison context Choose up to three standard models in Compare. Requirements and prompt length apply in Compare. This page keeps its stated price basis and workload controls. MODEL PROOF # GLM 5.3 FlashX Z.ai · 18 Sept 2026 Balanced Summarise Chat Code gen Agentic NOT INDEPENDENTLY RATED ## No independent LMArena score is published for this model. **$0.590** / 1M tokens Balanced · 3 tokens in per 1 out Evidence as of 23 Sept 2026 [openrouter/models](https://openrouter.ai/api/v1/models) Independent LMArena score Not independently rated Context window 1.05M Maximum output 131.07K Input modalities text, image, video Output modalities text Published input price $0.370 / 1M tokens Published output price $1.25 / 1M tokens Pricing kind fixed Inspect [complete billing conditions](#billing-details) and endpoint terms below. Every price dimension · USD per million tokens | Input | $0.370 /M | | --- | --- | | Output | $1.25 /M | | Cached input | $0.090 /M | | Cache write | Unknown /M | | Cache write 1h | Unknown /M | | Reasoning | Unknown /M | ### Who sells it The same weights, different shops. Cheapest is not like-for-like when serving precision differs. 1 provider offers · rates, limits and conditions Rates are USD per million tokens. Endpoint terms can differ even when the quoted price and precision match. A listed parameter is a provider declaration, not a task-success test. | Seller | Input | Output | Precision | Uptime (1d) | | --- | --- | --- | --- | --- | | Seller Z.AI z-ai/fp8 Endpoint terms Cached input /M $0.090 Context limit 1,048,576 tokens Output limit 131,072 tokens Tools Listed by endpoint Reasoning Listed by endpoint Promotional discount None reported Uptime · last 30 minutes 100.00% | Input $0.370 | Output $1.25 | Precision fp8 | Uptime (1d) 100.00% | ### Independent scores No independent benchmark has measured this model. Unrated is not a score of zero. ### Capability | Context window | 1M | | --- | --- | | Max output | 131K | | Input modes | text, image, video | | Tool use | yes | | Reasoning | always on | | Open weights | Unknown | ### Provenance | Price source | [openrouter.ai](https://openrouter.ai/api/v1/models) | | --- | --- | | Fetched | 2026-09-23 | | Quality data | unrated | GLM-5.3-FlashX is the high-speed variant of Z.ai's GLM-5.3-Flash, a native multimodal model delivering inference speeds of up to 200 tokens/s. Built on the same hybrid sparse and linear attention architecture... ## Questions this page answers What does GLM 5.3 FlashX cost? $0.370/M in, $1.25/M out in this catalogue, as of the fetch date on this page. That is the API row, not a subscription. Does GLM 5.3 FlashX have an independent quality score? GLM 5.3 FlashX has no independent quality score in this catalogue. Unrated is not a score of zero. What beats GLM 5.3 FlashX? GLM 5.3 FlashX has no independent quality score. Unrated is not a score of zero. Does this page use Artificial Analysis scores for GLM 5.3 FlashX? No. Artificial Analysis figures are not published here. Quality on this page is LMArena Elo where a score exists; otherwise the row is unrated. Does a missing score mean GLM 5.3 FlashX scored zero? Unrated is not a score of zero. MODEL MONUMENT ## Save or share this proof Download proof card · 1200 × 630 Preview and more sharing options Z.ai: GLM 5.3 FlashX. Balanced workload. Not independently rated. Evidence as of 23 Sept 2026. Copy model link Download square card · 1080 × 1080 Copy landscape image Share landscape card ## Related No independent quality score, so there is no dominator to name. Unrated is not a clean bill of health. - Side by side [GLM 5.3 Flash](/compare/z-ai__glm-5.3-flash--vs--z-ai__glm-5.3-flashx/) - Same vendor [GLM 5.3](/models/z-ai__glm-5.3/) - Z.ai models [Z.ai](/providers/z-ai/) - Where this model appears [effort](/effort/) - Same vendor [GLM 5.3 Flash](/models/z-ai__glm-5.3-flash/) - Same vendor [GLM 5.2](/models/z-ai__glm-5.2/) ## Badge The verdict as one SVG, for a README or a docs page. It states this model's dominance status at the balanced workload on the LMArena lens, with the date it was computed, and it is rebuilt with the catalogue — so it changes when the verdict changes, including to one you would rather it did not. Markdown Copy [![GLM 5.3 FlashX — Undominated.ai dominance verdict](https://undominated.ai/badge/z-ai__glm-5.3-flashx.svg)](https://undominated.ai/models/z-ai__glm-5.3-flashx/) HTML Copy GLM 5.3 FlashX — Undominated.ai dominance verdict Direct file: [https://undominated.ai/badge/z-ai__glm-5.3-flashx.svg](https://undominated.ai/badge/z-ai__glm-5.3-flashx.svg) — a static SVG, written by scripts/build-badges.mjs on every build, so the copy you embed is never older than the last deploy. ## Continue your investigation - [Explore model families](/families/) - [Compare a shortlist](/compare/) - [Check a model](/check/) - [Understand the evidence](/methodology/)