# GLM-5.3 Now Available on Telnyx Inference

> Source: <https://telnyx.com/release-notes/glm-5-3-inference>
> Published: 2026-08-28 00:00:00+00:00

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GLM-5.3 is now available on the [Telnyx Inference API](https://telnyx.com/products/inference). It is a frontier-class reasoning model with intelligence comparable to Kimi K3, at roughly half the cost and twice the speed. The model runs on Telnyx-owned GPU infrastructure.

`zai-org/GLM-5.3`

. A 753B-parameter reasoning model with a 1M token context window, hosted on Telnyx-owned GPUs.`low`

, `high`

, and `max`

reasoning effort. `max`

is recommended for coding and complex analysis.Frontier intelligence has been locked behind premium pricing. GLM-5.3 changes that math. It matches Kimi K3 on the Artificial Analysis Intelligence Index while costing roughly half as much per token and generating output at twice the speed. Running on Telnyx-owned GPU infrastructure means inference stays on the same private backbone as your voice, messaging, and compute traffic. No cross-vendor hops, no reseller markup, no separate billing surface. For teams building AI agents that need frontier reasoning at production scale, the cost-per-task difference compounds fast.

`zai-org/GLM-5.3`

from the model dropdown.

```
curl https://api.telnyx.com/v2/ai/chat/completions \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "zai-org/GLM-5.3",
    "messages": [
      {"role": "user", "content": "Debug this Python function and explain the fix."}
    ],
    "thinking": {"type": "enabled"},
    "reasoning_effort": "max"
  }'
```

**Learn more** in the [Z.ai GLM-5.3 blog post](https://z.ai/blog/glm-5.3), the [Artificial Analysis model profile](https://artificialanalysis.ai/models/glm-5-3), or the [Inference API docs](https://developers.telnyx.com/docs/inference/models).