GLM 5.2 vs GLM 5.3
Different efforts: non-thinking · low · Compare all at max
Terminal-Bench 4.0 Terminal-Bench 4.0 · source setting 2: Agents use a terminal to complete executable coding, system administration and research tasks in the 4.0 suite
GLM 5.2 · max1
GLM 5.334.8
DeepSWE 1.1 DeepSWE 1.1: Agents change repository code to resolve software engineering tasks under the stated DeepSWE edition
GLM 5.2 · max43.8
GLM 5.3 · max69
WebDev Arena WebDev Arena: Human pairwise preferences in the stated webdev vote pool
GLM 5.2 · max1,604
GLM 5.3 · max1,621
SciCode SciCode: Writing code for real scientific computing problems (physics, biology, math)
GLM 5.2 · max51.2
GLM 5.342
FrontierCode 1.1 FrontierCode 1.1: Agents implement changes in real repositories, graded against maintainer-defined requirements
GLM 5.2—
GLM 5.3 · max40.1
SWE-bench Pro (v2 full) SWE-bench Pro (v2 full): Agents resolve repository issues under the network-locked v2 protocol; full and 51-task Hard results are separate
GLM 5.2—
GLM 5.3 · max95.6
SWE-bench Pro (v2 hard) SWE-bench Pro (v2 hard): Agents resolve repository issues under the network-locked v2 protocol; full and 51-task Hard results are separate
GLM 5.2—
GLM 5.3 · max84.3
DeepSWE 1 DeepSWE 1: Agents change repository code to resolve software engineering tasks under the stated DeepSWE edition
GLM 5.2 · max41.5
GLM 5.3—
Terminal-Bench Science 0.1 Terminal-Bench Science 0.1: Agents complete expert-authored research workflows across five scientific domains in a terminal
GLM 5.2—
GLM 5.3 · max9.5
Terminal-Bench Hard (version unstated) Terminal-Bench Hard (version unstated): Agents solve difficult software, system-administration and data-processing tasks in a terminal
GLM 5.2 · max50.8
GLM 5.3—
| Benchmark | GLM 5.2 | GLM 5.3 |
|---|---|---|
| Terminal-Bench 4.0 | 1 · max | 34.8 |
| DeepSWE 1.1 | 43.8 · max | 69 · max |
| WebDev Arena | 1,604 · max | 1,621 · max |
| SciCode | 51.2 · max | 42 |
| FrontierCode 1.1 | — | 40.1 · max |
| SWE-bench Pro (v2 full) | — | 95.6 · max |
| SWE-bench Pro (v2 hard) | — | 84.3 · max |
| DeepSWE 1 | 41.5 · max | — |
| Terminal-Bench Science 0.1 | — | 9.5 · max |
| Terminal-Bench Hard (version unstated) | 50.8 · max | — |
Specs
| Spec | GLM 5.2 | GLM 5.3 |
|---|---|---|
| Input, per 1M | !$1.40 | !$1.40 |
| Output, per 1M | !$4.40 | !$4.40 |
| Cost per task? | — | $0.85 |
| Speed, tok/s | 171 | 126 |
| Context | 1M | 1M |
| Weights | Open | Open |
| Released | Jun 2026 | Aug 2026 |
| Memory (4-bit) | 452 GB | 452 GB |
| Licence | MIT | glm-5.3 |
| Commercial use | Allowed | Restricted |
| See images | — | — |
| Read PDFs | — | — |
| Hear audio | — | — |
| Watch video | — | — |
| Call tools | ✓ | ✓ |
| Force a tool call | Partial | — |
| Return strict JSON | ✓ | ✓ |
| Search the web | ? | ? |
| Run code | ? | ? |
| Use a computer | ? | ? |
What breaks when you switch
GLM 5.2 → GLM 5.3
Reasoning cannot be disabled›
Disabling reasoning is unsupported; keep reasoning enabled.
tool_choice auto · Z.ai API›
The first-party chat reference exposes only auto for tool_choice.
Complete unmodified reasoning_content›
Preserved thinking defaults on for Coding Plan and off for the standard API; when enabled, return complete unmodified reasoning_content in its original order to protect quality and cache hits.
Only one stop word›
Only one stop word is supported, so do not rely on a list of alternative stop sequences.
GLM 5.3 → GLM 5.2
Nothing known.