# GLM 5.3 Available in OpenRouter

> Source: <https://openrouter.ai/z-ai/glm-5.3>
> Published: 2026-08-19 08:30:24+00:00

GLM-5.3 is a large-scale reasoning model from Z.ai, built for complex software engineering and long-horizon agent tasks. It supports text input and output with a 1M-token context window, and improves on GLM-5.2 in coding and in the balance between performance and token efficiency.

Reasoning is always on and cannot be disabled. Reasoning efforts `low`

, `high`

, and `max`

are supported; `max`

is the default.

Modalities

In / Out Price

$1.40 / $4.40per 1M

Context

1M

Released

Aug 18, 2026

| $1.40 | $4.40 | $0.26 | 5.71s | 27 tps |

Throughput

27tok/s

P50, best across providers

Latency

5.71s

P50, best provider

99.91%

99.65%

When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the [Endpoints API](/docs/api/api-reference/endpoints/list-endpoints). [Learn more](/docs/provider-routing) about our load balancing and customization options.