When was GLM-4.6 released?

GLM-4.6 was released by Z.ai on Tuesday, Sep 30 2025.

GLM-4.6 was built by Z.ai. Chinese AI lab spun out of Tsinghua University (formerly Zhipu AI), building the open-weight GLM family. Rebranded internationally as Z.ai in 2025.

How much does GLM-4.6 cost?

GLM-4.6 costs $0.60 per million input tokens and $2.20 per million output tokens through the Z.ai API. Cached input is $0.11 per million tokens. Rates are pay-as-you-go API prices verified against Z.ai's published pricing on August 18, 2026.

What benchmark scores did GLM-4.6 get?

GLM-4.6 reports 1 tracked benchmark score — SWE-Bench Verified: 68%. Tracked scores may come from lab reports or independent benchmarks; source details accompany the benchmark data.

What is the context window of GLM-4.6?

GLM-4.6 has a context window of 200k. That is the maximum amount of input plus output the model can hold in a single request.

How many parameters does GLM-4.6 have?

GLM-4.6 is reported at 355B parameters.

Is GLM-4.6 open source?

Partly. GLM-4.6 is an open-weight model: the trained weights are free to download and run locally or on your own infrastructure, but the training data and code are not fully released and the license may restrict some commercial uses. It is not open source in the strict sense.

What came before and after GLM-4.6?

Z.ai's previous tracked release was GLM-4.5-Air on Jul 28 2025, 64 days earlier. It was followed by GLM-4.7 on Dec 22 2025.

GLM-4.6Open Weight

Released Sep 30 2025

GLM-4.6 is an AI model released by Z.ai on Tuesday, Sep 30 2025, 64 days after GLM-4.5-Air. It is an open-weight model — the trained weights are available to download and run. It is a 355B parameter model with a 200k token context window. Benchmark results (shown below) cover SWE-Bench Verified.

API pricing

Input: $0.60
Cached input: $0.11
Output: $2.20

Reasoning or thinking is supported.

USD per 1M tokens

Available from


Venice	$0.43	$1.75	200K	fp4
DeepInfra	$0.50	$2.00	200K	fp4
Novita	$0.55	$2.20	200K	bf16
Z.AI	$0.60	$2.20	200K	fp4

USD per 1M tokens

Benchmarks

SWE-Bench Verified

68%

#40 of 57

Compare GLM-4.6 with

GLM-4.6

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About

GLM-4.6, released September 30, 2025, refined Z.ai's 355B open-weight flagship with a context window expanded from 128K to 200K tokens and markedly stronger real-world coding — 68.0% on SWE-Bench Verified, up eight points from GLM-4.5, with token efficiency improvements that cut the cost of agentic runs.

Positioned aggressively against Claude Sonnet 4.5 (released the very next day) at a fraction of the price, GLM-4.6 became a staple budget option in coding agents like Claude Code-compatible harnesses and Cline. GLM-4.7 continued the line in December 2025 before the 744B GLM-5 generation arrived in February 2026.

Frequently asked questions

: GLM-4.6 was released by Z.ai on Tuesday, Sep 30 2025.
: GLM-4.6 was built by Z.ai. Chinese AI lab spun out of Tsinghua University (formerly Zhipu AI), building the open-weight GLM family. Rebranded internationally as Z.ai in 2025.
: GLM-4.6 costs $0.60 per million input tokens and $2.20 per million output tokens through the Z.ai API. Cached input is $0.11 per million tokens. Rates are pay-as-you-go API prices verified against Z.ai's published pricing on August 18, 2026.
: GLM-4.6 reports 1 tracked benchmark score — SWE-Bench Verified: 68%. Tracked scores may come from lab reports or independent benchmarks; source details accompany the benchmark data.
: GLM-4.6 has a context window of 200k. That is the maximum amount of input plus output the model can hold in a single request.
: GLM-4.6 is reported at 355B parameters.
: Partly. GLM-4.6 is an open-weight model: the trained weights are free to download and run locally or on your own infrastructure, but the training data and code are not fully released and the license may restrict some commercial uses. It is not open source in the strict sense.
: Z.ai's previous tracked release was GLM-4.5-Air on Jul 28 2025, 64 days earlier. It was followed by GLM-4.7 on Dec 22 2025.