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Compare performance benchmarks, coding intelligence, reasoning evaluations, context limits, and API economics between GLM 5.2 (Zhipu AI) and Step 5 Preview (StepFun).
| Metric / Capability | GLM 5.2 | Step 5 Preview |
|---|---|---|
| Developer / Organization | Zhipu AI | StepFun |
| Release Date | 2026-06-16 | 2026-10-08 |
| Deployment / Weights | Open Weights | Open Weights |
| Context Window | 1.0M tokens (1,048,576 tokens) | 1.0M tokens (1,048,576 tokens) |
| Input Pricing (/1M Tokens) | Free (Open Weights) | Free (Open Weights) |
| Output Pricing (/1M Tokens) | Free (Open Weights) | Free (Open Weights) |
| Benchmark / Domain | GLM 5.2 | Step 5 Preview | Advantage |
|---|---|---|---|
Artificial Analysis Intelligence Index Composite index aggregating 10+ evaluations of general reasoning and knowledge. | 33.7% | 43.7% | Step 5 Preview (+30%) |
Artificial Analysis Coding Index Composite index of coding and software-engineering evaluations. | 68.8% | — | — |
Artificial Analysis Agentic Index Composite index of tool-use and long-horizon agentic tasks. | 38.4% | — | — |
Artificial Analysis Coding Agent Index v2.0 Composite index of coding-agent systems (model + harness) across FrontierCode v1.1, SWE-Atlas-QnA, and Terminal-Bench v4. | — | 43.1% | — |
SWE-bench Pro Harder, contamination-resistant successor to SWE-bench spanning multiple languages. | 62.1% | — | — |
Terminal-Bench 4.0 Sandboxed command-line tasks requiring shell and file-system operation. | — | 33.3% | — |
ARC-AGI-2 Novel visual grid puzzles requiring abstract rule induction. | 22.8% | — | — |
GPQA Diamond Graduate-level physics, chemistry, and biology questions written by domain experts. | 91.2% | 93.5% | Step 5 Preview (+3%) |
Humanity's Last Exam Expert-written questions across hundreds of disciplines designed to resist saturation. | 40.5% | 46.5% | Step 5 Preview (+15%) |
FrontierMath v2 (Tiers 1-3) Unpublished, research-level mathematics problems across Tiers 1-3. | 59.2% | — | — |
Design Arena ELO Human-preference ELO across UI, 3D, data-visualization, and game-dev generations. | 1291 | — | — |
Step 5 Preview outperforms GLM 5.2 across 3 evaluated benchmarks compared to 0 for GLM 5.2, excelling in Artificial Analysis Intelligence Index, GPQA Diamond, Humanity's Last Exam.
Both models feature equivalent context windows of 1.0M tokens (1,048,576 tokens).
Both models have comparable pricing structures or open weight deployment options.
GLM 5.2 is an open-weights model. Step 5 Preview is an open-weights model.
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