GLM-5.3 Flash
Released 26 Aug 2026 under a straight MIT licence and, on price per unit of measured intelligence, the strongest value on the board. A 320B-parameter MoE with 18B active, scoring 42 on the Artificial Analysis Intelligence Index v4.3 — three points behind its own 753B flagship GLM-5.3, at $0.15/$0.50 against that model's $1.40/$4.40. That is roughly a tenth of the input cost for 93% of the score. It is also the open-weight model most teams can realistically self-host: 320B total is demanding but not rack-scale in the way Kimi K3's 2.8T is, and the 18B active count keeps inference cheap. 1M context, text and image in, text out, 117.2 tokens/second, 18 API providers. One caveat: Artificial Analysis flags it 'very verbose' at 180M output tokens across the index against a 140M median, so budget output tokens at roughly 1.3x what the headline rate implies.
1M
tokens
66K
tokens
$0.15
per 1M tokens
$0.5
per 1M tokens
117
tokens/sec
Aug 2026
2026-08-26
$0.33
per 1M tokens
286.2
quality per $
Capabilities
Benchmarks
Price vs Quality
Context Window in Context
- ▸ GLM-5.3 Flash1M
- GPT-4.11M
- Gemini 2.5 Pro1M
- Gemini 2.0 Flash1M
- Llama 4 Maverick1M
- GPT-5.51M
- GPT-5.5 Pro1M
- Claude Opus 4.71M
Compare With
Open Source: Licensed under MIT
Not on our gateway yet
GLM-5.3 Flash is open-weight, so you can run it yourself. Swfte Connect turns your deployment into a managed endpoint that speaks the same API as every other model in this directory.
curl https://api.swfte.com/agents/v2/gateway/chat/completions \
-H "Authorization: Bearer $SWFTE_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "zhipu:glm-5.3-flash",
"messages": [{"role": "user", "content": "Hello"}]
}'About GLM-5.3 Flash
GLM-5.3 Flash is a open-source AI model by Z.ai (Zhipu AI), released on August 26, 2026. It supports a context window of 1000K tokens and can generate up to 66K output tokens.
At $0.15 per million input tokens and $0.5 per million output tokens, its blended cost of $0.33/1M tokens makes it one of the most affordable models available. Its value score of 286.2 reflects the balance of quality and cost.
GLM-5.3 Flash is available as an open-source model under the MIT license, meaning you can self-host it for predictable costs or use it through API providers like Swfte Connect.
Using GLM-5.3 Flash with Swfte
Access GLM-5.3 Flash through Swfte Connect, our unified LLM gateway. Connect gives you a single API for 50+ models, with automatic routing, cost optimization, and fallback handling. You can also try GLM-5.3 Flash in our AI Playground before integrating.