Z AI
GLM-5.1 (Reasoning)
GLM-5.1 delivers a major leap in coding capability, with particularly significant gains in handling long-horizon tasks. Unlike previous models built around minute-level interactions, GLM-5.1 can work independently and continuously on a single task for more than 8 hours—autonomously planning, executing, and improving itself throughout the process—ultimately delivering complete, engineering-grade results.
Z AI releasesModel Snapshot
TypeLanguage
ReleaseApr 7, 2026
Context202,800
Tagsreasoning, tool-use, implicit-caching, file-input
Overall
Rank #14 across 526
51.4
Coding
Rank #39 across 436
43.4
Blended Price
Rank #256 across 357
$2.15/M
Strength Profile
Percentile score by analysis domain.
* Cost is inverted: lower input, output, and blended prices rank higher.
Benchmark Percentiles
Higher bars mean stronger relative placement.
Model Details
Runtime
Output Speed46.8 tok/s
First Token1.10s
Max Output64,000
Pricing
Blended$2.15/M
Input$1.40/M
All Benchmarks
| Metric | Domain | Value | Rank |
|---|---|---|---|
| Artificial Analysis Intelligence Index | overall | 51.4 | #14 |
| Artificial Analysis Coding Index | coding | 43.4 | #39 |
| GPQA | reasoning | 86.8% | #44 |
| Humanity's Last Exam | reasoning | 28.0% | #40 |
| SciCode |