meta
GLM 5.3 Flash vs Muse Spark 1.3
63.0 overall · $2.00 / 1M
// z-ai
GLM 5.3 Flash
z-ai/glm-5.3-flash
reasoningtool callingimage inputvideo inputprompt caching
GLM 5.3 Flash costs $0.150 per 1M input tokens and $0.500 per 1M output tokens with a 1.0M-token context window.
A reasoning, tool-calling model from z-ai, released Aug 26, 2026. On LiveBench it scores 62.1 overall — #20 of 28 benchmarked models — and ranks highest in documents & design (#14).
- Input / 1M
- $0.150
- Output / 1M
- $0.500
- Context
- 1.0M
- LiveBench overall
- 62.1 · #20
Specs and pricing
| Input price USD per 1M prompt tokens | $0.150 |
|---|---|
| Output price USD per 1M completion tokens, reasoning included | $0.500 |
| Blended price 3:1 input:output — #90 cheapest of 350 listed models | $0.237 |
| Cached input read Blank means not priced separately — not free | $0.030 |
| Cache write | — |
| Context window | 1,048,576 tokens |
| Max output | 943,717 tokens |
| Input modalities | text, image, video |
| Tool calling | Yes |
| Extended reasoning | Yes |
| Knowledge cutoff | — |
| Listed | Aug 26, 2026 |
Also listed as z-ai/glm-5.3-flash:batch ($0.082 blended)— the same model at a different price or rate limit.
Benchmarks by category
LiveBench scores out of 100, with GLM 5.3 Flash's rank among the 28 benchmarked models listed here. Run: glm-5.3-flash.
What GLM 5.3 Flash costs to run
Monthly list cost across five workload shapes, using the published cached-input rate where there is one. A floor, not a quote — batch discounts and cache writes aren't included.
| Workload | Per month |
|---|---|
| Support chatbot 1.2K in / 400 out × 200K requests | $67.36/mo |
| RAG assistant 8K in / 600 out × 100K requests | $102.00/mo |
| Coding agent 40K in / 4K out × 20K requests | $92.80/mo |
| Document extraction 20K in / 1.5K out × 50K requests | $181.50/mo |
| Bulk classification 500 in / 20 out × 5M requests | $365.00/mo |
Compare GLM 5.3 Flash with
The benchmarked models closest to it on overall score.
moonshotai
GLM 5.3 Flash vs Kimi K3
64.6 overall · $4.14 / 1M
openai
GLM 5.3 Flash vs GPT-6 Luna
64.6 overall · $0.200 / 1M
GLM 5.3 Flash vs Gemini 3.8 Flash
59.2 overall · $1.65 / 1M
stepfun
GLM 5.3 Flash vs Step 5 Preview
58.6 overall · $1.43 / 1M
qwen
GLM 5.3 Flash vs Qwen3.8 27B
58.4 overall · $0.581 / 1M
GLM 5.3 Flash FAQ
How much does GLM 5.3 Flash cost?
GLM 5.3 Flash lists at $0.150 per 1M input tokens and $0.500 per 1M output tokens, with cached input reads at $0.030 per 1M. A RAG assistant handling 100K requests a month (8K tokens in, 600 out) comes to about $102.00 at list price.
What is the context window of GLM 5.3 Flash?
GLM 5.3 Flash accepts up to 1,048,576 tokens of context and can return up to 943,717 output tokens per response.
Does GLM 5.3 Flash support tool calling?
Yes — GLM 5.3 Flash supports tool (function) calling and exposes extended reasoning. It accepts text, image, video input.
How does GLM 5.3 Flash score on benchmarks?
On LiveBench release 2026-10-25 (run: glm-5.3-flash), GLM 5.3 Flash scores 62.1 overall, ranking #20 of 28 benchmarked models.
What is the API model ID for GLM 5.3 Flash?
On OpenRouter the model ID is "z-ai/glm-5.3-flash". It was listed on Aug 26, 2026.
More from z-ai
How these numbers are produced
- Price and specs — provider list data from OpenRouter, refreshed every 15 minutes. “Blended” is a 3:1 input:output mix.
- Scores and ranks — LiveBench release 2026-10-25. Ranks count only models that have a published run; a blank means “not evaluated”, never “bad”.
- Cost per point — the measured dollars LiveBench spent on the run, divided by the score it earned.
Published benchmarks rank models on someone else's tasks. Before committing, see LLM & agent evaluation for building an eval on your own.