GLM 5.3 Flash
GLM 5.3 FlashAlternatives?
CheaperMiMo v2.6 ProthinkingOpen+8%-53%$0.13Memory (4-bit): 193 GB → 615 GB+4
BetterMuse Glimmer 30BhighOpen+4%-80%$0.058Context: 1M → 131K
OpenStep 5 Previewthinking+10%+262%$1.03Memory (4-bit): 193 GB → 363 GB+3
CheaperGPT-6.1 Sollow+5%-54%$0.13Remove unsupported parameters+5CheaperGPT-5.6 Lunamax+5%-37%$0.18MiMo v2.6 ProthinkingOpen+8%-53%$0.13Memory (4-bit): 193 GB → 615 GB+4GPT-6.1 Sollow+5%-54%$0.13Remove unsupported parameters+5GPT-5.6 Lunamax+5%-37%$0.18Muse Glimmer 30BhighOpen+4%-80%$0.058Context: 1M → 131KGPT-6 Lunamax+4%-76%$0.068Function calling only with none · Chat Completions+3Muse Glimmer 30BhighOpen+4%-80%$0.058Context: 1M → 131KGPT-6 Lunamax+4%-76%$0.068Function calling only with none · Chat Completions+3GPT-6.1 Sollow+5%-54%$0.13Remove unsupported parameters+5MiMo v2.6 ProthinkingOpen+8%-53%$0.13Memory (4-bit): 193 GB → 615 GB+4GPT-5.6 Lunamax+5%-37%$0.18Step 5 PreviewthinkingOpen+10%+262%$1.03Memory (4-bit): 193 GB → 363 GB+3Muse Glimmer 30BhighOpen+4%-80%$0.058Context: 1M → 131K
Ling 3.1 FlashOpen+4%+252%$1.00Memory (4-bit): 193 GB → 343 GB+1
MiniMax M3thinkingOpen+4%+79%$0.51Context: 1M → 524K+3
DeepSeek V4.1 Flash 1017maxOpen+3%-8%$0.26Memory (4-bit): 193 GB → 458 GB+5GLM 5.3maxOpensame+607%$2.01Memory (4-bit): 193 GB → 452 GB+5GLM 5.2maxOpen-2%+419%$1.47Memory (4-bit): 193 GB → 452 GB+1GLM 5thinkingOpen-5%—$1 / $3.20Context: 1M → 203K+2GLM 5.1thinkingOpen-8%+259%$1.02Context: 1M → 203K+2GLM 5 Turbothinking-10%—$1.20 / $4Context: 1M → 203K+1GLM 4.7thinkingOpen-11%—$0.60 / $2.20Context: 1M → 203K+2GLM 5V Turbothinking-12%—$1.20 / $4Context: 1M → 203KGLM 4.5thinkingOpen-34%—$0.60 / $2.20Context: 1M → 131K+2All Z.ai models →Run it yourself
estimateHistory
3 versionsBenchmarks
in Chat & KnowledgeWatch out 5
Defaults to max · Self-hosted›
The Flash chat template falls back to max reasoning effort for missing or unrecognized values; pass low or high explicitly to reduce effort. Source ↗
Reasoning cannot be disabled›
Disabling reasoning is unsupported; keep reasoning enabled. Source ↗
tool_choice auto · Z.ai API›
The first-party chat reference exposes only auto for tool_choice. Source ↗
Complete unmodified reasoning_content›
Preserved thinking defaults on for Coding Plan and off for the standard API; when enabled, return complete unmodified reasoning_content in its original order to protect quality and cache hits. Source ↗
Only one stop word›
Only one stop word is supported, so do not rely on a list of alternative stop sequences. Source ↗
FAQ
How much does GLM 5.3 Flash cost?›
$0.15 per 1M input tokens and $0.50 per 1M output tokens; cached input $0.03 per 1M; cheapest via OpenInference at $0.047 / $0.16. A typical benchmark task costs about $0.28 at max effort.
Is GLM 5.3 Flash free to use?›
There is no free API; the cheapest paid price is $0.047 per 1M input tokens. The weights are open, so you can run it yourself.
How good is GLM 5.3 Flash, and what is it best at?›
#46 of 334 in Chat & Knowledge, #21 of 132 in Coding, #17 of 133 in Agents & Tool Use, #42 of 195 in Writing & Language, #27 of 37 in Vision & Documents. Strongest at: Coding, Agents & work tasks, Reasoning, Science, Long context, Knowledge.
Is GLM 5.3 Flash better than Grok 4.7?›
On AA-LCR (long context) 1.1, GLM 5.3 Flash scores 80 vs 80 — about the same. It is 77% cheaper per task.
How can I use GLM 5.3 Flash?›
Through the API of BaseTen, CoreWeave, Crusoe, DeepInfra, DigitalOcean and 21 more.
What is the context window of GLM 5.3 Flash?›
1M tokens, with up to 131K output tokens.
When was GLM 5.3 Flash released? Is there a newer version?›
Released 2026-08-26. It is the current version in its line.
Is GLM 5.3 Flash open source?›
Yes, the weights are open (MIT licence).
Can I run GLM 5.3 Flash locally?›
The weights are open and can be self-hosted; hardware needs are not confirmed yet.
Can GLM 5.3 Flash read images?›
It accepts text and images, video as input.
What is GLM 5.3 Flash?›
GLM 5.3 Flash is an open-weights language model from Z.ai, released Aug 2026.
What are the best alternatives to GLM 5.3 Flash?›
MiMo v2.6 Pro (cheaper), Muse Glimmer 30B (better), Step 5 Preview (open weights).